Poly 74-20 is a 1A:2B mix, A~20 hardness, polyurethane liquid rubber that cures in ~16 hours and is designed for making high-performance, high-strength rubber molds for casting materials such as plaster (for millwork, home décor, etc.), wax (candles & lost wax patterns) and resins (polyurethane, polyester, epoxy - with proper release agents).

Release sealed patterns with 2300 spray release.

Poly 74-20 is particularly well-suited for casting concrete (veneer stone, architectural cast stone elements, concrete counter tops) and often eliminates the need for concrete release agents. Poly 74-20 molds can be poured as supplied or brushed-on by mixing in Poly Fiber II thickener. 
Poly 74-20 liquid rubber is an excellent multi-purpose, economical mold material that will provide long mold life, durability and consistent performance under high volume casting applications.

WARNING: 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 www.P65Warnings.ca.gov. 

Want Premium Performance From Your Veneer Stone Molds? Go No Further Than Poly 74-20. The best release properties for concrete or stone.
Call Us To Discuss How to use this product release-free for concrete, stone, and gypsum applications.

For professional use only. Use in well ventilated area.

Mixing Ratio: 1A: 2B
Durometer: 20 Shore A
Working Time: ~30 Minutes
Color: Yellow
Mixed Viscosity (cP): 800

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