PMC 746

Unit Size	Net Weight
Gallon Kit	24 lb
Five Gallon Kit	120 lb

 

PMC746 Polyurethane rubber was developed to make molds for casting gypsum plasters. Like PMC744, this product is well suited for use as a rubber case mold - especially large case molds where extra rigidity is required. Due to its durability and moisture resistant properties PMC746 is also used by zoos and museums for a variety of mold-making, display and exhibit applications. PMC746 contains no mercury.
Other applications include making plaster block molds, reproducing ornamental plaster (architectural restoration), pre-cast concrete molds, casting waxes, Smooth-On rigid polyurethanes and epoxies and also formaking a variety of special effects for movies and theatres.

Technical Properties

Mix Ratio by Weight	2A:1B
Mix Ratio by Volume	2A:1B
Pot Life	15 minutes
Cure Time	16 hours
Color	from Amber to Blue
Shore Hardness	60A
Mixed Viscosity	1,200 cps
Shrinkage	< .001 in./in.
Specific Volume	26.9 cu. in./lb.
Specific Gravity	1.03g/cc
Tensile Strength	700 psi
100% Modulus	220 psi
Elongation @ Break	650%
Die C Tear Strength	100 pli

 

Technical Bulletin

PRODUCT ADVISORY:
The products listed below are currently SPECIAL ORDER items and require pre order.
Lead times may vary - For more information please contact our staff.

700600 - PMC 746 - Gallon Kit
700610 - PMC 746 - Five Gallon Kit