Our Glass Microspheres are great for lightweight, low-density composite resin filling. This resin filler is clear and hollow, allows for easy sanding, and is great for filling in voids, fiberglass fabric weaves, and cracks when added to a resin. You can rest assured that your batch will be within specs every time, with the same color, viscosity, strength, and application characteristics as you would expect from a high-quality product. 

Sizes: 2.5 Quart Tub, 5 Quart Tub, 5lbs or 20lbs