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TotalBoat Glass Microballoons make for a great low-cost, low-density filler. They are white, hollow, and made of sodium borosilicate. To prevent sagging, Silica Thickener may also be combined with the microballoons.
To prepare for use, start by thoroughly mixing your resin/hardener. Then add in TotalBoat Glass Microballoons and your bulking agent. Blend well. TotalBoat Silica Thickener may then be added if applicable. ALWAYS remember to stir from the bottom to the top.