Master Bond‘s Supreme 42HT-2ND Black is a two-part, non-drip epoxy system designed for bonding, sealing, and coating applications. It’s capable of withstanding temperatures up to 450° F (232° C) and provides a glass-transition temperature (Tg) of 130° to 135° C.
The material meets NASA low-outgassing standards and is recommended for applications that require vacuum compatibility.
Supreme 42HT-2ND Black is electrically insulative with a volume resistivity greater than 1014 ohm-cm. This compound has a Shore D Hardness of 75 to 85 at 75°F and withstands rigorous thermal cycling. It passed damp heat reliability testing for 1,000 hours at 85° C and 85% relative humidity.
It offers a high-strength profile, with a tensile strength of 9,000 to 10,000 psi and a tensile modulus of 300,000 to 350,000 psi at 75° F.
With a forgiving mix ratio of 100 to 40 by weight or 100 to 50 by volume, this paste consistency material can be easily applied with the use of a gun dispenser or spatula. It cures at ambient temperature in two to three days, or faster with the addition of heat. Adding heat not only speeds up the curing process but also optimizes the overall performance properties.
Supreme 42HT-2ND Black is available in standard packaging, double barrel cartridges for gun kits, as well as pre-mixed and frozen syringes.