- UL94 V-0
- Long working time
- Medium viscosity
- 200% elongation
- Shore Hardness: 87A
- Excellent Thermal Cycling Stability from -40°F (-40°C) to 302°F (150°C)
- Applications include: automotive LED lighting, automotive sensors
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. This UL APPROVED , medium viscosity material is self-leveling and flows like chocolate syrup around electrical components to ensure complete coverage of your entire PCB or electronic assembly. (UL File#: QMFZ2.E135297)
TOUGH-SEAL™ 42 has a longer 60 minute working time and a Shore Hardness of 87A, which is similar to the hardness of the heel of a men’s dress shoe. TOUGH-SEAL™ 42 reaches 94% of its full hardness after an overnight cure or with a heat cure of 1 hour at 80°C (176°F). TOUGH-SEAL™ does not exotherm or shrink during curing, therefore there is no embedment stress induced on the electronic components that could cause damage and failure of the PCB or electronic assemblies. Sensitive electronics can be potted safely with low embedment stress TOUGH-SEAL™.
With a high elongation of 200% when fully cured, TOUGH-SEAL™ 42 maintains exceptional flexibility and thermal cycling stability from –40°C to 150°C (-40°F to 302°F) without pulling back, wilting, or cracking. This ensures a tough seal that will stop moisture or other contaminants from damaging sensitive PCB’s and electronics.
TOUGH-SEAL™ has very aggressive adhesion to aluminum, making it a perfect choice for potting aluminum housings in LED lighting applications. TOUGH-SEAL™ bonds extremely well with most polymers. For housing and wire insulation materials that are exceptionally difficult to bond to, we offer our KEY PR1200 PRIMER, an aggressive adhesive promoter that is simple to use.
Color, Part A
Viscosity at 25°C, cP, Part A, (RVT #5, 20 RPM)
Specific Gravityat 25°C, Part A
Color, Part B
Viscosity at 25°C, cP, Part B, (RVT #5, 20 RPM)
TOUGH-SEAL™ is a superior family of KEY sealants available in four standard formulations to fit a variety of potting applications. While all TOUGH-SEAL™ formulations are durable hybrid epoxy elastomers that grip and protect under the most aggressive conditions, they are available in a combination of properties that vary in hardness, gel-time, working time, and flow.
Your Evaluation Kit will include everything you need to perform your own high quality product evaluation for your application.