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Thermal Insulation Fillers

Geocon Products offers a wide range of Thermal Insulation Fillers to suit specific needs. Beyond the previously mentioned examples, there's a whole world of possibilities for superior insulation. For instance, products like hollow glass microspheres are gaining traction. These tiny glass bubbles trap air, creating a lightweight and highly effective barrier against heat transfer.  Another option is ceramic microspheres, which offer excellent thermal stability and can be easily incorporated into various materials due to their good flow properties. In applications where maintaining a balance between insulation and heat dissipation is important, boron nitride cooling fillers come into play. Made from a lightweight ceramic compound, boron nitride provides good thermal conductivity while maintaining insulative properties. This makes it ideal for electronics components that need to operate efficiently without overheating.

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Approx. 1,400 / kg Get Latest Price

Product Brochure
Product Details:
Minimum Order Quantity50 kg
FormBorosilicate Glass
Hs Code70192000
Molecular Weight179.93
Packaging Size50 kg
Packaging TypeCorrugated Box with Liner

We offer 3M Hollow Glass Microspheres for Thermal Insulation Applications. The high strength and low thermal conductivity (0.06 – 0.2 W•m-1•K-1 at 0°C)* of 3M™ Glass Bubbles make them ideal additives in pipeline and riser insulation. These inert particles are completely compatible with all other components of the insulating system, including polyurethane, polypropylene and epoxy. What''s more, these hollow glass microspheres are virtually insoluble in water…providing better utility in underwater applications.

Typical application area where Thermal Conductivity can be reduced: -

PVC Window Profiles & Frames
Insulation Profiles
Solar Reflective Paints

Additional Information:
  • Item Code: 15
  • Port of Dispatch: Bhiwandi
  • Production Capacity: 1000 kg
  • Delivery Time: Ex Stock
  • Packaging Details: 50 Kg BOX

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Approx. 10,000 / Kg Get Latest Price

Product Brochure
Product Details:
Minimum Order Quantity25 Kg
Packaging Size25 kg
Grade StandardTechnical Grade
Physical FormPowder
Usage/ApplicationHigh-Performance Lubricant, Mold Release, Refractory, Thermal Conductive Plastics & Coatings.
Packaging TypePail or Box

3M™ Boron Nitride Cooling Fillers:Supercharge Thermal Performance

Challenge: Electronic miniaturization and increasing power densities are pushing thermal management solutions to their limits. Plastics, commonly used in electronics, are often poor heat conductors.

Solution: 3M™ Boron Nitride Cooling Fillers offer a revolutionary approach to managing heat in electronic devices.


• Superior Thermal Conductivity: Boost thermal conductivity of polymers by 2-8 times compared to alumina fillers, effectively transferring heat away from critical components.
• Exceptional Electrical Insulation: Maintain high electrical resistivity (>10^15 Ohm*cm) and breakdown strength, ensuring component safety and functionality.
• Processability Advantage: Minimize equipment wear and extend tool life due to the fillers' low abrasiveness compared to other ceramic fillers.
• Lightweight Design: With a density of 2.25 g/cm³, 3M BN fillers enable lightweight composite materials (1.2 – 1.6 g/cm³) for weight-sensitive applications.
• Form Variety: Available in platelets, flakes, and agglomerates, allowing for tailored thermal conductivity in both in-plane and through-plane directions.


• Injection Molded Parts: Housings, sockets, and other components requiring improved heat dissipation.
• Potting Resins: Isolate and protect electronic components from heat and moisture.
• Thermal Interface Materials (TIMs): Foils, pads, and greases for efficient heat transfer between components and heat sinks.
• Electric Motors: Improve heat management in stators, windings, and hairpins.
• High-Temperature Insulation Foils: Enhance thermal performance while maintaining excellent electrical insulation properties.

3M BN Cooling Fillers are a versatile solution for a wide range of thermal management challenges. Contact us today to learn more about how these innovative fillers can help your electronics run cooler and more efficiently.

Additional Information:
  • Item Code: 122
  • Production Capacity: 1000 Kg
  • Delivery Time: 1 week
  • Packaging Details: 25 Kg Box or Pail

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Approx. 150 / Kg Get Latest Price

Product Details:
Model Name/NumberGP-200
FinishGrey Powder
Hs Code681599990
Molecular FormulaAlumino Silicate
Molecular WeightNA
Packaging Size25 Kg
Packaging TypeBags
Size/Dimension20 Micron
Usage/ApplicationCoating Additive
Weight2.4 g/cc
Inner Hole DiameterNA
Median Particle Diameter7 micron

Grey Series Ceramic Microspheres

Imagine a tiny, lightweight ceramic ball – that's a Grey Series ceramic microsphere! These remarkable materials are revolutionising industries like construction and transportation.

What are Grey Series Ceramic Microspheres?

Made primarily of silica and alumina, Grey Series microspheres are spheres Lightweight

  • High Strength
  • Heat Resistant
  • Chemical resistance
  • Abrasion resistance
  • Acid resistance


  • Industrial Coatings
  • High build epoxy coating
  • Refractory and Foundry coating
  • Anti Fouling Marine Coatings
  • Polymeric floors
  • Beyond Construction and Transportation:
    • Filtration media in industrial processes.
    • Fireproofing and insulation materials.

Benefits of Using Grey Series Microspheres

  • Weight Reduction: Leading to improved efficiency and performance across industries.
  • Enhanced Durability: Contributing to the longevity of products they're incorporated into.
  • Cost Savings: Lower transportation and construction costs due to weight reduction.
  • Environmentally Friendly: Reduced energy consumption in buildings due to lightweight construction.

The Future is Bright

As research and development continue, the potential applications of Grey Series microspheres are expected to expand. We can anticipate advancements in production methods, material science, and exploring sustainable sources.

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Approx. 1,600 / Kg Get Latest Price

Product Brochure
Product Details:
Model Name/NumberS28HS
Hs Code70182000
Packaging Size35 kg
Packaging TypeLD liner inside inside a box

3M™ Glass Bubbles S28HS are hollow glass spheres with a typical density of 0.28 g/cc and an isostatic crush strength of 3,000 psi. These glass bubbles are designed for numerous applications such as deep water syntactic foams and airless spray coatings. The bubbles produce strong, stable voids with low thermal conductivity, helping the coating achieve the necessary compressive strength.
3M™ Glass Bubbles S28HS are engineered hollow glass spheres made from water-resistant and chemically-stable soda-lime borosilicate glass. Like all 3M™ Glass Bubbles, our S28HS glass bubbles are water and oil resistant, providing better utility in underwater applications. Additionally, they are non-combustible and non-porous, so they do not absorb resin; and their low alkalinity makes this product compatible with most resins while providing a stable viscosity and a long shelf life.

3M glass bubbles are a superior alternative to many conventional fillers and additives such as silicas, calcium carbonate, talc, clay and other materials used in demanding applications. Our low-density spheres are used in a wide range of industries to reduce part weight, lower costs and enhance product properties – making them more reliable and affordable.

The benefits don’t end there; although these hollow spheres have thin walls, they have an impressive isostatic crush strength of 3,000 psi, making them suitable for a number of buoyancy applications, including additives in buoys and moorings. S28HS bubbles have a fractional survival rate of 90%, at 3,000 psi for consistent performance and greater survivability.

Notably, 3M™ Glass Bubbles S28HS are lower density 3,000 psi glass bubbles that offer significantly less weight, for better thermal conductivity at a given depth rating. These glass bubbles provide significantly lower density for better thermal conductivity at a given depth rating compared with S35 glass bubbles.

3M glass bubbles S28HS bubbles can be used in many applications. One area where they excel is in airless spray coatings. Here’s how it works – an airless spray pumps a liquid that shoots through a nozzle. When bubbles are added to a coating, they have to survive this process and remain intact, meaning it’s important to pick bubbles on the basis of strength. Our bubbles offer sufficient strength at a minimal density.

In general most of airless spray equipment is in the 2,500-4,000 psi range. Our S28HS may work well for airless spray depending upon the formulation. It’s not just the fact that it has a 3,000 psi rating, this bubble has an average diameter of 30 microns, and 0.28 g/cc density. This unique combination of strength, overall particle size and density means this bubble may be well suited for airless spray coatings.


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Vinit Jartare  (Director)
Geocon Products
A 312, Pratik Industrial Estate, Mulund, Goregaon Link Road Bhandup West
Mumbai - 400078 , Maharashtra , India
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