Poly-Optic® 1411 Clear Casting Resin is a two-part, liquid polyurethane resin that cures (RTV) to a water-clear, Shore D80 plastic. This product has a simple 1A:1B mix ratio by volume. Vacuum and/or pressure casting techniques are recommended for this product. Cure inhibition can occur when casting this resin in tin-cured silicone rubber molds – use a platinum-cured silicone rubber mold if working with silicones. WARNING: This product contains Phenylmercuric acetate (CAS 62-38-4) chemicals known to the State of California to cause reproductive harm. For more information, go to www.P65Warnings.ca.gov. FOR INDUSTRIAL/PROFESSIONAL USE ONLY. Technical Specifications Mix Ratio by Volume:1A:1B Mix Ratio by Weight:100A:90B Shore Hardness:D80 Pot Life:9 min. Demold Time:30 min. Cured Color:Water-Clear Mixed Viscosity:600 cP Specific Volume:25.8 in³/lb Specific Gravity:1.07 Linear Shrinkage:0.0018 in/in Elongation:7 % Tensile Strength:6,083 psi Elastic Modulus:133,956 psi Flexural Modulus:250,992 psi Flexural Strength, 5% Strain:8,478 psi Heat Deflection Temp.:138°F Max Exotherm:228°F Notes":Demold time varies with thickness of casting and the amount of Poly-Optic Part X Accelerator added. The thinner the casting, the longer the demold time. Technical Bulletin Safety Data Sheet - Part A Safety Data Sheet - Part B Kit Components Poly-Optic® 1411 Components 3.8-lb kit includes: 2 lb of Poly-Optic® 1411 Part A (~1 quart)1.8 lb of Poly-Optic® 1411 Part B (~1 quart) 15.2-lb kit includes: 8 lb of Poly-Optic® 1411 Part A (~1 gallon)7.2 lb of Poly-Optic® 1411 Part B (~1 gallon) 76-lb kit includes: 40 lb of Poly-Optic® 1411 Part A (~5 gallons)36 lb of Poly-Optic® 1411 Part B (~5 gallons)