Glass Micro Balloons

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General purpose lightweight filler for use in polyurethane resins. When blended with resin, these hollow glass spheres make a lightweight, sandable filler. The average bubble is le ss than 70 microns, about a quarter of a grain of sand. Select this unique size and shape for a variety of reasons: Tiny spheres blend readily for an evenly spreadable paste. They are adaptable to a variety of production processes such as spraying, casting, and molding. Low density reduces weight, lowers costs, and enhances properties for finished parts. Spheres provide lower viscosity, improved flow and reduce shrinkage and warp. Add filler after adding catalyst to resin. Mix ratio is 3:1 (filler to resin by volume). Show more