System Three White Glass Microspheres, 1 Quart Tub Description These bulking agents are hollow, clear microscopic spheres that serve as a low-cost, low-density filler. The average particle size of these microspheres is 55 microns. Add to your epoxy resin kit and hardener mix to create a light- weight fairing compound with good compressive strength. System Three epoxy resin mixture can be blended with a small amount of Silica Thickener to prevent sagging. Features: Glass Microspheres: These bulking agents are hollow, clear microscopic spheres that serve as a low-cost, low-density filler; Use as epoxy thickener Versatile Application: When added to epoxy resin and hardener mix, they make a good, heat-resistant, light-weight fairing compound with good compressive strength Measure And Mix: Mix the desired amount of resin and hardener, add glass microspheres in increments, and mix thoroughly by stirring from the bottom to the top until the desired consistency is reached Extra Features: Glass Microspheres can be blended with a small amount of fumed silica thickener to prevent sagging in you epoxy system Tips And Tricks: Clean hands, exposed skin, and work surfaces with mild soap and water Product Details: Brand: System Three Material: Glass Microspheres Compatible Material: Glass Color: White Item Package Quantity: 1 Is Discontinued By Manufacturer ‏ : ‎ No Package Dimensions ‏ : ‎ 6.5 x 4.2 x 3.9 inches; 8.01 Ounces Item model number ‏ : ‎ 3145S16 Date First Available ‏ : ‎ October 23, 2013 Manufacturer ‏ : ‎ System Three Resins, Inc. Best Sellers Rank: #64,260 in Industrial & Scientific (See Top 100 in Industrial & Scientific) #218 in Tile Epoxy Adhesives #218 in Tile Epoxy Adhesives Customer Reviews: 4.6 4.6 out of 5 stars 180 ratings