Silpak R-3700-20 Translucent, Pourable Platinum Silicone System, Food Safe

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Silpak R-3700-20 Translucent, Pourable Platinum Silicone System, Food Safe
Categories:	Polymer; Thermoset; Rubber or Thermoset Elastomer (TSE)
Material Notes:	Silpak R-3700-20 Liquid Silicone Rubber is a two-component, room temperature curing mold rubber. R-3700-20 silicone rubber is platinum activated, which, unlike tin-activated systems, do not shrink on cure or deteriorate over time. Molds made from R-3700-20 offer good chemical resistance, making them an appropriate choice when planning to cast polyesters, polyurethanes (plastic, foam, rubber), epoxies and more. It offers excellent release properties, making release agents unnecessary in many applications. Additives to vary the viscosity and cure time of the liquid rubber as well as hardness and color of the cured rubber are available. Features: Food Safe, Complies with 21CFR 177.2600 Low viscosity Easy release properties High Tear Strength Cures at room temp or accelerate with heat Easy Mix ratios Applications: This rubber system is used to make parts or molds used to cast the following: Polyester Epoxy Thermoplastics (polyvinyl) Urethane Any material where a release free casting is required Low melt metal (350°F) Wax Soap Plaster Information provided by Silpak a division of Polytek Development Corp.
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Physical Properties	Original Value	Comments

Specific Gravity	1.14 g/cc
Viscosity	5000 cP	Initial Base
	5500 cP	Initial Mixed
	6000 cP	Initial Activator
Storage Temperature	60.0 - 90.0 °F

Mechanical Properties	Original Value	Comments
Hardness, Shore A	25
Tensile Strength	480 psi
Elongation at Break	600 %
Tear Strength	150 pli

Thermal Properties	Original Value	Comments
Shrinkage	0.00 %

Processing Properties	Original Value	Comments
Cure Time	4.00 - 5.00 hour	Demold
Shelf Life	6.00 Month

Descriptive Properties
Color	White Translucent
Mix Ratio	1 Base : 1 Activator	by weight
	1 Base : 1 Activator	by volume
Pour time	15 min
Specific Volume	24.3 in3/lb

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PSILPAK021 / 318658

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