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Vermiculite in Kenya +254 722 401 175

Insulation World Kenya Limited is the leading wholesale distributor of exfoliated vermiculite in Kenya and Eastern Africa. Call us through +254 722 401 175 to place order.

What is Vermiculite?

Vermiculite is a hydrated magnesium aluminum silicate mineral which resembles mica in appearance. Vermiculite is formed by weathering or hydrothermal alteration of biotite or phlogopite. Vermiculite is mined using open cast mining techniques where the ore is screened and classified into five different particle sizes namely: Large, Medium, Fine, Superfine and Micron. Vermiculite undergoes significant expansion when heated. The mineral is expanding into worm-like strands. When expanded it drastically increases its volume and absorption ability. It is a silica mineral and are used in agriculture, horticulture, construction and industrial sectors. Vermiculite is also an excellent material for fire-proofing and insulation. It is also used for insulation or as a moisture-retentive medium for growing plants


Insulation World Kenya Limited is the leading wholesale distributor of exfoliated vermiculite in Kenya and Eastern Africa. Call us through +254 722 401 175 to place your order.

What is Vermiculite?

Vermiculite is a hydrated magnesium aluminum silicate mineral which resembles mica in appearance. Vermiculite is formed by weathering or hydrothermal alteration of biotite or phlogopite. Vermiculite is mined using open cast mining techniques where the ore is screened and classified into five different particle sizes namely: Large, Medium, Fine, Superfine and Micron. Vermiculite undergoes significant expansion when heated. The mineral is expanding into worm-like strands. When expanded it drastically increases its volume and absorption ability. It is a silica mineral and are used in agriculture, horticulture, construction and industrial sectors. Vermiculite is also an excellent material for fire-proofing and insulation. It is also used for insulation or as a moisture-retentive medium for growing plants

Properties of Vermiculite

High water retention capacity optimizing water efficiency

It enhances germination, root, and shoot development. Vermiculite continues to provide the benefits of moisture retention throughout the growth cycle.

High cation exchange capacity (CEC)

CEC indicates the value of a soil to retain cation nutrients. The cation process captures available nutrients, ammonia (nitrogen ions), magnesium, potassium and calcium for slow release

Aeration and thermal properties

Roots must have adequate level of oxygen from the soil and aeriation is the process that facilitates oxygen exchange.

Thermal ‘insulating’ properties

Vermiculite has excellent insulation properties

Neutral Carrier

Vermiculite is a registered animal feed carrier used in pre-mixes in the animal feed industry.


Vermiculite aggregates have been used in fire-proofing products for decades.

Applications of Vermiculite

Common applications of Vermiculite include Agriculture, Automotives, Carrier and Bulking Agents, Chemical Packaging, Construction and Concrete, Fire Protection, Horticulture, Industrial, Loose Fill Thermal Insulation, Masonry Insulation, Molten Steel Insulation, Packaging Films, Plasters, Refractory, Speciality Coatings, Swim Pool Liners e.t.c.


Exfoliated vermiculite is free-flowing, soft, non-organic, and absorbent. In the agriculture industry, vermiculite’s absorbency allows for a high volume uptake of appropriate fluid, and therefore a greater yield, all while retaining good handling. Below is a list of uses of vermiculite in agriculture/horticulture.

  • Growing medium
  • Holds water and nutrients, releases as required
  • It is also used as a water retention product for plants.
  • Excellent for root cutting.
  • Sterility prevents ‘damping off’ during transplanting

Vermiculite acts as a catalyst in animal feed, soaking up a range of essential nutrients, including:

  • Feed-grade fats
  • Vegetable oils
  • Choline chloride
  • Amino acids
  • Saccharide
  • Polyoxyethylene
  • Formalin
  • Vitamins
  • Molasses
  • And more

It also acts a slow release agent for the active ingredients carried, provides extra roughage, and mixes easily with other materials.

  1. AUTOMOTIVE USES OF EXFOLIATED VERMICULITE (Friction Linings, Gaskets, and Fluid Sealing)

Since the early 1900’s scientists and engineers have sought a unique combination of properties such as reinforcing stability and thermal stability for commercial gasket production. Today, properties derived from exfoliated vermiculite continue to meet the demands of thermal stability, reinforcing properties and the lubricating nature of gasket fields.


Fine Particulate Sized Vermiculite (FPSV)

Fine Particulate Sized Vermiculite (FPSV) and other finer grades of exfoliated vermiculite are used in friction linings for the automotive market. FPSV processed vermiculite is produced by thermal exfoliation in specially designed furnaces at ~1500°F  where it expands up to 11 times in volume. The expanded vermiculite is then purified to remove contaminants and further processed to consistently meet particle size and bulk density requirements. FPSV processed vermiculite is used as a functional filler in wet lay gaskets used in automotive, as well as friction materials.

Vermiculite is used for this application because of its:

  • Thermal resistance
  • Shape
  • Surface characteristics
  • Easy of addition to other raw materials
  • Acoustic absorption

Both organic and inorganic high-performance materials such as polyimide, aramid, graphite, ceramic, and others have been developed for automotive applications. While each of these materials has merit in commercial automotive, friction lining and gasket applications, no single material has been found to be adequate, and it is common practice to use a multiplicity of substances to develop such products. While vermiculite has a similar structure to exfoliated graphite, it does not oxidize and is therefore very appropriate for automotive applications, including:

  • Brake linings
  • Clutch discs
  • Rubber seals
  • Automotive paints and lacquers

Fluid Sealing

MicroLite® Vermiculite Dispersions has been shown to upgrade the heat and fire resistance, increase the abrasion resistance, and enhance the fluid sealing characteristics of many conventional substrates used in fluid sealing applications. Vermiculite dispersions take advantage of vermiculites layer mineral and charge characteristics to produce an inorganic, anisotropic, platy morphology that is particularly suitable in fluid sealing.

Because of the inherent high-temperature stability and oxidation resistance of vermiculite, the gaskets are intrinsically improved over graphite materials. No additional treatments or engineering considerations are needed to mask the oxidation potential. This makes for a user-friendly material that decreases post-manufacture handling.

Major benefits include extreme high-temperature stability, good torque retention, and superior oxidation resistance. It is thought the gaskets will have applicability in a wide range of stringent fluid sealing applications.


  1. Vermiculite as a Carrier and Bulking Agent

Vermiculite is used as a carrier and bulking agent across many industries, thanks to many of its renowned properties, including:

High Absorbency

Expanded vermiculite is highly absorbent and capable of wicking fluid and attracting nutrients.

Light Weight

Vermiculite adds mass to a product without the heavy weight of many other bulking agents. This increases ease of application and can help save on transportation and labor costs.


It won’t rot, mold, or decay—essential requirements for carrier and bulking agents.

Uses of Vermiculite as a Carrier and Bulking Agent


This highly absorbent material is often used as a carrier for liquid and solid fertilizers and chemicals. It helps ensure the products are dispersed evenly.


It is used for industrial waste clean-up and packaging for hazardous chemicals.

Animal Feed

It is a magnet for nutrients and can enhance animal food products so animals have a more nutrient-dense diet.

  1. Chemical Packaging (Lab Packs and Packaging Materials)

Lab Packs: Take No Risks

When it comes to safety, no risks should be taken, and vermiculite is a safety necessity when packaging hazardous materials. It provides a cushion and is absorbent—essential for shipping the hazardous liquids. The benefits of vermiculite Lab Packs include:


It is lightweight, minimizing shipping costs, and is also clean and non-abrasive


Its free-flowing property makes for quick, easy coverage. This tight coverage minimizes impact and shock.

Naturally absorbent material

Because it is absorbent, it can safely retain accident leaks.


It is non-flammable and does not emit fumes or odors.

Non-Reactive and inorganic

Vermiculite is a naturally occurring and completely inert mineral, eliminating problems that occur in other forms of packaging materials. It will not react with most common chemicals, ensuring possible leaks will be contained and safe during transport. When properly packed,

Packaging Materials

Exfoliate vermiculite can also be used to protect fragile objects. It is easily poured around irregularly shaped objects—hazardous and harmless alike—and provides a cushion against shock during handling and transportation.

It’s useful for packaging because of its unique qualities:

  • Highly absorbent
  • Non-flammable
  • Does not emit fumes or odors
  • Easy to use
  • Sturdy, yet soft


What makes our packing vermiculite different

Our packing vermiculite has fine particles that fill the tiny crevices many larger vermiculite ores miss. This means your items are more secure and less susceptible to damage.

  1. Construction and Concrete

There are numerous qualities that make vermiculite incredibly valuable in the construction industry, including:

  • Non-flammable
  • Non-combustible
  • Economical
  • Odorless
  • Does not emit toxic fumes
  • Does not attract pests/rodents
  • Does not deteriorate or decompose

Thanks to these attributes, vermiculite uses are vast.

Insulating and lightweight properties allow for applications in:

  • Loose fill insulation in masonry construction and attics
  • Loose fill in hollow cavities reduces noise transmission
  • Lightweight aggregate for fire insulation concretes
  • Manufacture of passive fire protection products
  • Fire resistant building boards
  • Chimney Lining

Building boards

Boards containing exfoliated vermiculite are often used to protect building elements from the effects of cellulosic fires. It is used as a core in firedoors, to build fire barriers, to encase or construct ductwork, and to protect steel building elements.

Potassium silicate or sodium silicate bound boards

When produced with the addition of vermiculite, these boards can withstand service temperatures of up to 1150C and are frequently used as backup insulation behind the carbon cathode in the potcells.

This process can be also used to manufacture acoustic panels to reduce reverberation time.


Exfoliated vermiculite is used in both hand- and spray-applied general building plasters to improve coverage, ease of handling, adhesion to a wide variety of substrates, fire resistance, and resistance to chipping/cracking/shrinkage.

Acoustic- and fire-protection products often use vermiculite combined with a binder such as gypsum, portland cement, or (more rarely) an air setting clay, plus fillers and rheological aids.

Lightweight concrete roofs and floors

Finer grades of exfoliated vermiculite can be added at site to portland cement and other aggregates for roof and floor concrete applications or lightweight concrete, with the intention of imparting the benefit of being lightweight and insulating.

Loose-fill insulation uses

It is heat-resistant, inert, inorganic, lightweight, and absorbent, making it an excellent loose fill insulation that protects against heat, sound, and moisture.

Raise the Roof with Vermiculite

Concrete roofs containing vermiculite are often used in conjunction with other insulation materials such as polystyrene board to form a total roofing system. When combined with a bituminous binder, vermiculite can help create a lightweight roof which has the advantages of low thermal conductivity, low moisture content, and easy placement by pouring directly from the bag and then tamping.

Rest Assured with Vermiculite

Vermiculite’s fireproofing characteristics are recognized nationally by offices of local building officials,  state rating bureaus, and insurance companies. Underwriters’ Laboratories, a global independent safety science company with more than a century of expertise in innovating safety solutions, have assigned up to 4-Hour ratings to room and deck systems that employ vermiculite as one of the components.

And they are made to last—concrete roofs made using vermiculite may be guaranteed by the applicator for up to 50 years!

  1. Fire Protection

Vermiculite is used to impart a high degree of fire protection in many industrial and construction applications. Its low density and impressive insulation properties make it useful in:

  • Building boards
  • Fire door cores
  • Encased ductwork
  • Steel building elements
  • Gypsum plasterboard
  • Cementitious spray

If it can’t stand the heat…add vermiculite!

Because vermiculite platelets are inorganic, vermiculite can be used as a high-temperature coating, binder, or filler in construction materials, gaskets, specialty papers, and high-temperature textiles. It can impart fire-resistance and upgrade the service temperature of the end product.

Coatings of vermiculite on fiberglass textiles have been shown to increase the service temperatures up to 1100C. These materials have found use in applications including safety fabrics, safety clothing, and thermal insulation.

  1. Horticulture

Vermiculite is an efficient growing aid commonly used in the horticulture industry. It acts as a magnet for nutrients and is revered for its ability to improve soil, resulting in a better crop.

Horticultural Vermiculite benefits include:

  • Improved aeration
  • Moisture retention
  • Faster root growth
  • Retains nutrients
  • Permanent, clean, and odorless
  • Will not turn moldy or rot

There are many ways vermiculite is used to encourage successful planting and growing.

Hydroponic Gardens

Vermiculite acts as a magnet for nutrients like potassium, calcium, and magnesium, making it a valuable and time-saving addition to passive hydroponics systems.

Soil gardens

Exfoliated vermiculite improves soil aeration while retaining moisture and nutrients to feed roots, cuttings, and seeds for fast growth. It is also useful for houseplants that may be more prone to soil compaction.

Carrier and Bulking Agents

It is a lightweight and efficient bulking agent for fertilizers, pesticides, and herbicides, ensuring even distribution.

Summer or Winter Mulch

Mixing vermiculite in with mulch can help retain moisture and insulate plant roots.

Flower Arrangements

Vermiculite can be added to water in vases to preserve flowers for a longer time than water alone.

  1. Industrial

Vermiculite’s numerous properties make it valuable for industrial uses:

Friction Lining

Finder grades of exfoliated vermiculite are used in friction linings, primarily for the automotive market. It is used for this purpose because of its thermal resistance, ease of adding to other raw materials, and its shape and surface characteristics.

High-temperature Insulation

Finer grades of vermiculite are used in the production of insulation, often mixed with sodium or potassium silicate.

Hot Topping in the Steel Industry

Vermiculite concentrate exfoliates immediately when poured onto hot metal to form an insulating layer that keeps the material hotter longer.

Mine Sealant

Vermiculite is used as an additive in Portland cement and used as a sealant in underground mines to prevent the ingress of methane, which might explode.

Paints, Sealants, Plastics, and Mastics

Finely ground vermiculite is added to improve their flame retardancy and enhance performance in areas where there is an excessive amount of ultraviolet light.

Refractory Gunning and Castable Mixes

Calcium aluminate cements and exfoliated vermiculite can be combined to produce refractory concretes and mortars.

Vermiculite Dispersions

Vermiculite dispersions, like MicroLite, are used in high-temperature coatings or binders for construction materials.

Well Drilling Materials

Vermiculite concentrate is used as a “lost circulation material” in drilling muds to prevent downhole pressure losses during well drilling and completion activities.

  1. Loose Fill Thermal Insulation

Vermiculite is ideal for loose fill insulation, protecting against heat, sound, and moisture.

It is heat-resistant, inert, inorganic, lightweight, and absorbent—all necessary attributes when creating an insulative product. Vermiculite is so useful and proven, and it has been a staple insulation in attics, lofts, walls, and high-temperature industrial applications for over half a century.

Also, it is one of the easiest products to apply; it just needs to be poured between joints and then leveled. It’s even ideal for filling odd-shaped spaces that require insulation.

  1. Masonry Insulation (Insulate Masonry Wall Cores or Cavities)

Masonry Insulation is free-flowing vermiculite used to insulate masonry wall cores or cavities.

It is lightweight, free-flowing, inorganic, and specially treated for water repellency. In addition, it increases the fire resistance rating and sound transmission classification of the wall system. Specially treated Masonry Insulation even eliminates moisture condensation.

No Time? No Problem

Masonry Insulation may be stored indefinitely. Plus, when installed with manufacturer’s recommendations, it does not require maintenance.

  1. Molten Steel Insulation (An Insulating Blanket that Reduces Heat Loss)

Molten Steel Insulation vermiculite expands when placed as a cover on molten metal, creating an insulating blanket, reducing heat loss.

Vermiculite is chemically inert, inorganic, and will not create smoke when heated. Molten Steel Insulation features specially sized and packaged vermiculite made just for use by the molten metals industry.

It’s Easy and Consistent—the Ideal Combination

Simply throw the bag onto the metal, and Metal Steel Insulation expands and spreads upon contact to provide insulating coverage. Because it is coarser when it expands, Molten Steel Insulation is less dusty than finer powder insulations.

You’ll know what to expect each time you use it; it is uniform in size for even flow characteristics and has repeatable chemistry from batch to batch.

And you don’t have to think twice about the bag—it is made of polyethylene and disintegrates upon contact with the molten metal.

  1. Packaging Films

Vermiculite packaging films are essential in numerous industries, and many consumers come in contact with a product enhanced with them every day.

Most often, this contact is in their kitchen, as vermiculite packaging films are frequently used as one of many layers of food packaging for a fresher product. It works because the vermiculite layer is electrically charged to keep oxygen from getting inside the bag. The dispersed platelets in this very thin layer create an impassable path for gas molecules.

Benefits of Vermiculite Packaging Films


It is a significantly better gas barrier compared to competing clear barrier materials, like polyvinylidene chloride (PVdC) and ethylene vinyl alcohol (EVOH).


When compared to other barrier methods, it has better moisture resistance and is not prone to flex-cracking. Plus, it is not corrosive.

Size variety

Vermiculite can be applied at different thicknesses to create different levels of gas barriers. This enables to it meet requirements of many packaging application.

Cost savings

Vermiculite packaging fills tend to be less expensive than alternative methods.

Environmental benefits

Vermiculite packaging provides better gas barriers with less material than other barrier methods. Plus, the coatings dissolve in landfills and do not inhibit the biodegradability of compostable packaging.

  1. Plasters

Exfoliated vermiculite is used in both hand- and spray-applied general building plasters to improve coverage, ease of handling, adhesion to a wide variety of substrates. It also increases resistance to fire, chipping, cracking, and shrinkage.

Proprietary and site mixed plasters can be applied to a variety of substrates including concrete, blockwork, expanded metal lath, and other plasters or renders.

Exfoliated vermiculite can also be combined with other aggregates, such as perlite, in plaster formulations.

  1. Refractory (Vermiculite for heat resistance)

Exfoliated vermiculite is used to impart heat resistance in products, often in the industrial industry.

When used for refractory purposes, the vermiculite is typically finer grade combined with sodium or potassium silicate. It is used to enhance:

  • Night storage heaters
  • Ceramic cooker hobs
  • Boilers
  • Cements
  • Building boards
  • High temperature/lightweight bricks
  • And more

When producing silicate-bound building boards, extra attention has to be paid to the dimensional stability of the shape. In many cases, these building boards have holes and penetrations to accept mounting brackets and fixing screws, which have to be very carefully placed.

The vermiculite refractory mixes are normally applied by mixing with the appropriate amount of water in a paddle mixer with rubber tipped blades.

  1. Speciality Coatings

Specialty coatings containing vermiculite are made from dispersions after the mineral has been finely delaminated, either chemically or physically. Vermiculite dispersions are used in high-temperature coatings or binders for:

  • Construction materials
  • Gaskets
  • Weld curtains
  • Specialty papers/textiles
  • Oxidation resistant coatings on carbon composites
  • As barrier coatings for films

When combined with other fillers, milled exfoliated vermiculite and a ‘paint type’ binder can be used as a wet spray-applied anti-drumming compound. These products are used extensively to dampen the vibration of architectural panels, like those used in curtain wall construction or as claddings in railway stations and tunnels.

  1. Swimming Pool Liners

(Double or triple the lifetime of your vinyl pool with vermiculite swim pool liners)

When combined with portland cement, finer grades of exfoliated vermiculite provide a base for swimming pool vinyl liners. This combination is used extensively in North America to stop the migration of stones which might puncture the vinyl liner, plus it accommodates movements in the water table. The use of vermiculite creates a smooth, soft, durable pool surface.

Why use Vermiculite in a Pool Liner Base?

Pool installers, property owners and pool owners everywhere can immediately tell the difference between pool liner base mixtures without Vermiculite versus those that are installed with Specialty Vermiculite’s Concrete Pool Base Aggregate. The obvious and clear differences are the ones you feel: swimmers all over the world will notice a tough, dry pool liner without vermiculite. And as a result of the hard liner, swimmers often come in contact with blisters and sores on their feet. When Specialty Vermiculite’s Concrete Pool Base Aggregate is a used as a precision-mixed blend, pool installers can almost guarantee property owners and pool owners will experience a textured, smooth surface finish. Outside of the easy installation and non-abrasive advantages, pool installers don’t have to worry about the ongoing liner maintenance compared to pools installed with packed sand or sand concrete bases which are subject to breaking.

Commercial Uses of Vermiculite

  • Molded shapes: this process involves mixing exfoliated vermiculite with inorganic bonding agents such as sodium silicate, cement (specific quantities), and other compounds, such as potassium ones, to produce an ‘earth damp’ mixture. This material is then hydraulically pressed into shape in a mold and then heat cured at temperatures up to 180 °C for up to 24 hours, depending upon the thickness of the moulded part. Such parts can withstand service temperatures of up to 1150 °C and are often used in the aluminium smelting industry as back-up insulation behind the carbon cathode in the potcells which contain the molten mixture of cryolite and alumina. The moulded shapes and boards are used in:
    • Open fireplaces
    • High-temperature or refractory insulation
    • Acoustic panels
    • Fireproofing of structural steel and pipes
  • Calcium silicate boards: exfoliated vermiculite is added to a calcium silicate slurry. This is then dewatered by pressing or by using one of the Fourdriner/Magnani/Hatschek processes to form a flat board which is then heat cured under pressure (typically 10–15 bar) for periods of up to 24 hours.
  • Brake linings: finer grades of exfoliated vermiculite are being used in brake linings primarily for the automotive market. The properties of vermiculite that make it an appropriate choice for use in brake linings include its thermal resistance, ease of addition to other raw materials to achieve a homogeneous mix, and its shape and surface characteristics.
  • Roof and floor screeds and insulating concretes: exfoliated vermiculite (typically the finer grades) can be added at site to Portland cement and other aggregates, rheological aids, and water to produce roof and floor concrete screeds which are lightweight and insulating. In many cases, vermiculite-based roof screeds are used in conjunction with other insulation materials, such as polystyrene board, to form a total roofing system. A bituminous binder can also be used with exfoliated vermiculite to produce a dry, lightweight roof screed which has the advantages of low thermal conductivity, low moisture content, and ease of placement (by pouring from the bag and then tamping).
  • Soilless growing medium: exfoliated vermiculite is combined with other materials such as peat or composted pine bark to produce soilless growing medium for the professional horticulturalist and for the home gardener. These mixes promote faster root growth and give quick anchorage to young roots. The mixture helps retain air, plant food, and moisture, releasing them as the plant requires them.[5] These mixes were pioneered by Boodley and Sheldrake. Exfoliated vermiculite is also used as a growing medium for hydroponics.
  • Seed germination: vermiculite, alone or mixed with soil or peat, is used to germinate seeds; very little watering is required. When vermiculite is used alone, seedlings should be fed with a weak fertilizer solution when the first true leaves appear. Start with one teaspoon of 5-10-5 soluble fertilizer per gallon of water, gradually increasing to one tablespoon (1:256 ratio) when transplanting.[6]
  • Storing bulbs and root crops: pour vermiculite around bulbs placed in container. If clumps are dug, allow to dry for a few hours in the sun and then place in cartons or bushel baskets and cover with vermiculite. The absorptive power of vermiculite acts as a regulator that prevents mildew and moisture fluctuation during the storage period. It will not absorb moisture from the inside of stored tubers, but it does take up free water from the outside, preventing storage rot.
  • As a soil conditioner: Where the native soil is heavy or sticky, gentle mixing of vermiculite—up to one half the volume of the soil—is recommended. This creates air channels and allows the soil mix to breathe. Mixing vermiculite in flower and vegetable gardens or in potted plants will provide the necessary air to maintain vigorous plant growth. Where soils are sandy, mixing of vermiculite into the soil will allow the soil to hold the water and air needed for growth.
  • As loose-fill insulation: Exfoliated vermiculite treated with a water repellent is used to fill the pores and cavities of masonry construction and hollow blockwork to enhance fire ratings (e.g. Underwriters Laboratories Wall and Partition designs), thermal insulation, and acoustic performance. Expanded vermiculite has also been used as thermal insulation in the attics and walls of houses and in water heaters, fire safes, stoves, furnaces, and refrigerators.[7]
  • Refractory/Insulation gunning and castable mixes: exfoliated vermiculite can be combined with high alumina (also known as calcium aluminate) cements and other aggregates such as expanded shale, clay, and slate to produce refractory/insulation concretes and mortars. In the early days of their use, these products were batched at or very close to the place of installation. This continues to be the case in some limited circumstances; however, more and more use is being made of pre-batched, proprietary mixes. Mixes containing vermiculite are used in areas where strength and corrosion/abrasion resistance are of secondary importance, the most important factor being the insulation performance of the in-place refractory lining. These mixes are used in industries including iron/steel, cement, and hydrocarbon processing
  • Cementitious fireproofing products: Exfoliated vermiculite is one the ingredients in the manufacture of cementitious and gypsum-based spray-grade fireproofing material, generally used as Passive Fire Protection products on structural steel and concrete.
  • As a constituent of a coating: vermiculite dispersions are typically either chemically or physically very finely delaminated vermiculite in a fluid medium. These dispersions can be used to make vermiculite ‘paper’ sheets by pouring them onto a piece of smooth, low surface-energy plastic, and allowing to dry. The resulting sheet can then be peeled off the plastic. Typical end-uses for vermiculite dispersions include inclusion in high temperature coatings or binders for construction materials, gaskets, specialty papers/textiles, oxidation-resistant coating on carbon based composites, and as barrier coatings for films.
  • As a packing material, valued for its high absorbency.
  • Waste treatment: the cation exchange capacity (up to 1,000 milliequivalents per kg) of vermiculite allows it to be used in fluid purification processes for waste water, chemical processing, and the pollution-control of air in mines and gases in industrial processes. In addition to its ion exchange properties, exfoliated vermiculite can retain liquids within the inter-laminar voids of the individual particles, as well as between the particles themselves.
  • As a substrate for various animals and/or a medium for incubation of eggs.
  • As a lightweight aggregate for plaster, proprietary concrete compounds, firestop mortar, and cementitious spray fireproofing: Exfoliated vermiculite is used in both hand and spray-applied general building plasters to improve coverage, ease of handling, adhesion to a wide variety of substrates, fire resistance, and resistance to chipping/cracking/shrinkage.
  • As an additive to fireproof wallboard.
  • As a component of the interior fill for firestop pillows, along with graphite.
  • As a carrier for dry handling and slow release of agricultural chemicals.
  • As a hot topping: both exfoliated and crude vermiculite have been used for hot topping in the steel industry. When poured onto molten metal, crude vermiculite exfoliates immediately and forms an insulating layer, allowing the material to be transported to the next production process without losing too much heat.
  • Used to permit slow cooling of hot pieces in glassblowing, lampwork, steelwork, and glass beadmaking.
  • Used in in-ground swimming pools to provide a smooth pool base: Finer grades of exfoliated vermiculite plus Portland cement may be combined either on-site or in a factory premix to provide a base for swimming pool vinyl liners. These mixes are pumped into place using a rotor stator pump, or hand poured.
  • Used in commercial hand warmers.
  • Used in AGA cookers as insulation.
  • Used in explosives storage as a blast mitigant.
  • Used to absorb hazardous liquids for solid disposal.
  • Used in gas fireplaces to simulate embers.
  • Used as part of a substrate for cultivation of fungi.
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