Microspheres (also known as micro balloons) are ultra-lightweight hollow glass spheres with a particle size of 20–200 microns, designed to enhance the performance and workability of polyester and epoxy resins. When blended into resin, these microscopic spheres displace volume with air, dramatically reducing weight and improving sanding, handling, and flow properties—making them a versatile filler for a wide range of applications.
Microspheres – Lightweight Filler for Epoxy & Polyester Resins
| SKU | Size | Made on Request | Price | Buy | Cart |
Description
Key Features & Benefits:
- Improves Sanding & Workability – Creates a softer, easier-to-sand composite for efficient finishing
- Lightweight Fill – Displaces 4–6x the weight of resin for low-density, high-build applications
- Low Shrinkage – Helps minimize cure shrinkage for more dimensionally stable repairs and builds
- Excellent Flow Properties – Spherical shape acts like tiny ball bearings, improving spread and application
- Customizable Consistency – Mix ratios range from viscous paste to thick, non-sag filler
- Economical – More cost-effective than pre-mixed resin fillers
Practical Applications:
- Ideal for surfboard and sailboard repairs
- Lightweight fairing and filling compound in marine and automotive fabrication
- Custom blends for DIY repairs, fiberglass reinforcement, and hobbyist projects
- Excellent for above-waterline repairs when sealed properly
- Suitable for gap filling, edge bonding, and smoothing surfaces prior to finish coating
Add a review
Currently, we are not accepting new reviews
Q & A
Ask a question
There are no questions yet
1 review for Microspheres – Lightweight Filler for Epoxy & Polyester Resins