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TOUGH-SEAL™ ULTRA 60 is a tough and durable longer working time low viscosity potting compound and sealant that flows like maple syrup around electrical components to ensure complete coverage of your entire PCB or electronic assembly. Bulldog tough to endure over 2000 hours of rigorous reliability testing at 85C/85%, TOUGH-SEAL™ ULTRA, without any signs of […]

TOUGH-SEAL™ ULTRA is next generation TOUGH-SEAL: still bulldog tough, but bred even better!

See which Tough-Seal products work best for your application.

Tough-Seal is the KEY material for the electronic encapsulation of sensitive electrical components requiring premium thermal cycling performance.

All the Tough-Seals cure to completion at ambient temperatures. Tough-Seal 21 and 31 are designed to have faster initial gelation times than Tough-Seal 22 and 32.

Wherever working conditions are harshest, the Tough-Seal line stands up to punishment that causes other encapsulants to fail.

TOUGH-SEAL™ 42, Key’s newest addition to the TOUGH-SEAL™ Product Line, is a UL 94 V-0 LISTED, tough and durable fast gelling Potting Compound and Sealant with excellent Thermal Cycling Stability.  

TOUGH-SEAL™ 41 is a UL 94 V-0 LISTED, tough and durable fast gelling Potting Compound and Sealant with excellent Thermal Cycling Stability.