Unit Size Net Weight Pint Kit 1.9 lb Gallon Kit 15.4 lb Five Gallon Kit 77 lb Smooth Cast 66D can be cast rotationally or solid for a variety of industrial and art-related applications. Fully cured castings are semi-rigid and exhibit good impact resistance. Castings resist moisture and mild solvents and can be machined, sanded and painted. Color effects are possible by adding SO-Strong tm color tints. New mercury free formulation. PropertiesTechnical Properties Mix Ratio by Weight 100A:93B Mix Ratio by Volume 1A:1B Pot Life 7 minutes Cure Time 60 minutes Color Grey Shore Hardness 66D Mixed Viscosity 120 cps Shrinkage 0.01 in./in. Specific Volume 26.4 cu. in./lb. Specific Gravity 1.05g/cc Tensile Strength 2,400 psi Elongation @ Break 20% How do I remove release agent from my cured urethane casting if I want to prime or paint the casting? Removing a silicone-based release agent from your cured urethane casting is not easy. The most effective way is to sand blast or bead blast the surface of your casting. However, sand blasting removes a micro thin layer of the castingÕs surface. If not done properly, you can damage or remove fine detail. Soap Wipe or brush the casting with a soap that has high alkali content. Cascade brand dishwashing gel is highly alkaline and also contains baking soda, which is an advantage. Solvents Wipe or brush the casting with Acetone, Toluene, Isopropyl Alcohol or Mineral Spirits. Important: follow all safety precautions when using flammable liquids. You can then prime and paint your casting.Media VideoDocumentation Technical Bulletin Special Order Items PRODUCT ADVISORY: The products listed below are currently SPECIAL ORDER items and require pre order. Lead times may vary - For more information please contact our staff.796315 - Smooth Cast 66D - Five Gallon Kit Related ProductsRELATED PRODUCTS: Ease Release 200