Compat 45

SKU: 801629

Size: Pint Kit


Unit Size Net Weight
Pint Kit 2.18 lb
Gallon Kit 17.4 lb
Five Gallon Kit 87 lb



Compat 45 is a unique urethane mold rubber which will not inhibit the cure of most Smooth-On platinum or tin cure silicone rubbers. It features a low viscosity of 2600cps for easy mixing and pouring and cures with minimal bubble entrapment. It is recommended to apply vacuum degassing to Compat 45 for a bubble free cured urethane. Mix ratio is 1A:1B by weight or volume, pot life is 25 minutes and the rubber cures with an ultimate Shore hardness of Shore 45A. Cured rubber is dimensionally stable (low shrinkage), offers good wear resistance excellent library life. Use only with Ease Release 200 release agent. Applications include: casting silicone prop body parts, complex silicone parts for tooling, cushioning, animatronic skins, medical trainers, as well as for making rubber masters which can be molded using platinum or tin cure silicones without inhibition concerns. Size: Pint Kit 2.18Lb

Can be used with Smooth-ON Ecoflex (see exceptions), Dragon Skin, Smooth-Sil and Mold Star series platinum-cure silicones. Also suitable for use with Mold Max and Oomoo series tin-cure silicones.
Not for use with Ecoflex GEL, Ecoflex 00-10, Ecoflex Near Clear, Encapso-K, Rubber Glass, Solaris, Soma Foama, Sorta-Clear 12, and Sorta-Clear 37 silicones.
Use only with Ease Release 200 release agent.
To thicken Compat 45 for brush on applications, only use Urefil 11 filler. Recommended starting proportion: Mix 1 part Urefil 11 with 1A:1B of Compat 45. Add more in small amounts if necessary.
Technical Properties
Mix Ratio by Weight 85A:100B
Mix Ratio by Volume 1A:1B
Pot Life 25 minutes
Cure Time 16 hours
Color Off White
Shore Hardness 45A
Mixed Viscosity 2,600 cps
Shrinkage < .001 in./in.
Specific Volume 24.7 cu. in./lb.
Specific Gravity 1.12g/cc
Tensile Strength 629 psi
100% Modulus 137 psi
Elongation @ Break 772%
Die C Tear Strength 101 pli



Payment & Security

Mastercard PayPal Visa

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

You may also like