Poly 74-20 Liquid Rubber

SKU:
7420U24

Poly 74-20 Liquid Rubber is a two-part, liquid polyurethane system that cures (RTV) to a yellow, Shore A20 rubber. This is the softest rubber in the Poly 74-Series line of polyurethane mold rubbers. Poly 74-20 is a pourable rubber, but it can be easily thickened with PolyFiber II Thickener for brush-on application.

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

FOR INDUSTRIAL/PROFESSIONAL USE ONLY. 

$217.60
Current Stock:
Looking for larger sizes (e.g., drum kits)?
Please contact Customer Service at 800-858-5990 or sales@polytek.com

Technical Specifications

Mix Ratio by Weight:
1A:2B
Shore Hardness:
A20
Pour Time:
20 min.
Demold Time:
16 hr.
Cured Color:
Yellow
Mixed Viscosity:
800 cP
Specific Volume:
27.5 in³/lb
Specific Gravity:
1.01
Elongation:
1,060 %
Tensile Strength:
217 psi
Die C Tear Strength:
43 pli
Notes:
Shake or Stir Part B before use. The color of polyurethane Part Bs may change in color from batch to batch or may darken with age, but product performance is not affected.

More Information

Material Calculator

Technical Bulletin

Safety Data Sheet - Part A

Safety Data Sheet - Part B

Kit Components
Poly 74-20 Components
6-lb kit includes: 2 lb of Poly 74-Series Part A (~1 quart)
4 lb of Poly 74-20 Part B (~2 quarts)
24-lb kit includes: 8 lb of Poly 74-Series Part A (~1 gallon)
16 lb of Poly 74-20 Part B (~2 gallon)
120-lb kit includes: 40 lb of Poly 74-Series Part A (~5 gallons)
80 lb of Poly 74-20 Part B (~10 gallons)

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