Insert WELD is military-grade, high-viscosity rubber toughened adhesive great for carbon and aluminum shafts. It's quick bond time (+/- 30 seconds), gap filling (.008") and shock resistance make it one of the best adhesives on the market. Black High-Viscosity Rubber Toughened Great for Carbon & Aluminum Shafts Shock Resistant .008 Gap Filler 3700 psi Strength Military Grade Max 90 sec Bond Time Temp Rated -65 F to +280 F