A brown powdery substance used in conjunction with cyanoacrylate adhesives to fill in cracks on hard plastic surfaces. Slice each side of the crack so as to create a V-shaped valley. Place a bead of Flex Bond along the full length of the bottom of the valley. Add Micro Balloon until the crack is filled level with the surrounding surface. (Use caution as the reaction between the adhesives and the Micro Balloon can cause skin burns.) Pour a small amount of Bond/Ca across the surface of the Micro Balloon. Fill imperfections with Flex Bond. Sand, texturize or grain, and paint as necessary.