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74-20 Brush-on Urethane Rubber Kit

  • $249.00

Our 74-20 kit helps get you started making brushed on molds for wax, plaster, and concrete casting. 74-20 is a very popular "pourable" rubber but may also be thickened for brushed on applications by adding the provided PolyFiber Thickener. 74-20 is a soft and stretchy, 20A urethane rubber that is ideal for molding statuary and other complicated parts. Use Hydrocal + Hemp, or thickened resin, such as 1512, for a mother mold. Mother mold materials not included.

Prop 65 WarningWARNING: This product can expose you to chemicals including Toluene diisocyanate (TDI), which is known to the State of California to cause cancer. For more information, go to

Kit includes 24lb kit (~3 Gallons) of 74-20, 1lb PolyFiber Thickener, Nitrile Gloves, stir sticks, brushes, graduated mixing cups, and 2300 spray release.

Technical Data: Poly 74-20 Datasheet 
                           Poly 74-20 Part A MSDS      Poly 74-20 Part B MSDS

                           Poly Fiber II MSDS

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