Silicones Inc. GI-739 5 Gallon Kit

Availability: In stock (2)

XT-739 is a thixotropic (resistant to flow) tin catalyzed silicone designed to be used when painting or spraying onto vertical surfaces. XT-739 does contain the mold rotting thixoadditives widely used today, but offers the end user the same ease of use and detail reproducibility. When catalyzed with one of our library life extending catalysts (see supplemental products) and stored correctly, a longer life of the cured mold should be expected. Its high tear strength, elongation and tensile strength make it an excellent choice for any mold making application. It is also resistant to inhibition by most common mold making substrates, eliminating the need to use mold sealers.

Typical Properties

Color -- Base: White Activator: Teal

Viscosity (cps) --  Base: 325,000 - 400,000 Activator: 900 - 1100 Mixed Viscosity 300,000 - 350,000

Mixing Ratio (B/A) By weight: 100 / 10 By volume: 100 / 11.1

Working Time 1 to 1.5 hours

Cure Time 16 - 18 hours

Shelf Life 6 months

Shore A Hardness 18

Tear Resistance (ASTM D624) 70 ± 10 ppi

Tensile Strength (ASTM D412) 275 ± 25 psi

Elongation (ASTM D412) 500 ± 50 %

Shrinkage 0.10 % -- Specific Gravity 1.10 Coverage (in3 / lb) 25.2

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