Poly-Optic 1420 Clear Casting Resin is a two-part, liquid polyurethane resin that cures (RTV) to a water-clear, Shore D85 plastic. It cures to a tough, impact and heat-resistant plastic that can be polished and machined and is used extensively in prototyping applications. Heat cure (150F – 180F) is required to achieve optimum physical properties. When cured at room temperature, the result is a brittle, glass-like casting.

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), a chemical known to the State of California to cause reproductive harm. For more information, go towww.P65Warnings.ca.gov.

FOR INDUSTRIAL/PROFESSIONAL USE ONLY.

Technical Specifications

Mix Ratio by Weight:2A:1BShore Hardness:D85Pot Life:15 min.Demold Time:8 hr. @ 150F / 30 min. @ 175FCured Color:Water-ClearMixed Viscosity:250 cPSpecific Volume:26.3 in/lbSpecific Gravity:1.05Elongation:5.3 %Tensile Strength:7,900 psiElastic Modulus:171,500 psiFlexural Modulus:250,000 psiFlexural Strength, 5% Strain:12,600 psiHeat Deflection Temp.:168FMax Exotherm:311FNotes: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. Shrinkage in polyurethane resins is caused by gelling while hot then cooling.

Technical Bulletin

Safety Data Sheet – Part A

Safety Data Sheet – Part B