TotalBoat Glass Micro balloon bubbles or Microspheres 5 Quarts

Glass Microballoons


Low-cost, low-density microscopic sodium borosilicate hollow glass spheres can be mixed into epoxy systems and polyester resins to thicken and extend without adding weight. Creates a lightweight, sandable compound ideal for fairing.

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Product Description

  • Lightweight glass balloons or bubbles that are easy to sand when cured. Perfect for smooth finish work.
  • Provides good impact strength
  • Can be used alone or blended with TotalBoat Silica Thickener (sold separately) to prevent sagging on vertical and overhead surfaces
  • Color: White
  • Size: Available in 1-Quart and 5-Quart sizes
  • Always wear proper safety protection when blending Glass Microballoons and other fillers into mixed resin/hardener, and when sanding
  • Not recommended for gluing

Where to use TotalBoat fillers

Add these Glass Microshperes to epoxy to create a lightweight fairing compound that’s easy to sand or shape. If sagging is a concern, Silica Thickener may be added. TotalBoat fillers can be used with either epoxy or polyester resins to change the resin properties for various uses, such as bulking out the resin or making it easy to sand. Because fillers can affect the pot life of a resin, create a small trial batch first to determine how much working time you’ll have.

Glass Microballoons Milled Glass Fibers Silica Thickener
Fairing ✔ (blended with Glass Microballoons)
Filleting ✔ (blended with Glass Microballoons)
Vertical Surfaces ✔ (in thick enough concentration)
Reducing Shrinkage
Reducing Weight
Surfboard or Sailboard Repair


TotalBoat Glass Microballoons SDS

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