Tough-Seal 42 A

1 of 8 products in this brand
Tough-Seal 42 A is a flame retardant version of Tough-Seal 22. The self-extinguishing flame retardant performance meets UL 94V-0 requirements and has been validated by UL for the official rating. KEY Tough-Seal 42A/Bachieves flame retardant properties without antimony or halogenatedcompounds. Like Tough-Seal, it is a tough and durable two component, hybrid epoxy elastomer that features excellent thermal cycling and exceptional flexibility.

Chemical Family: Epoxy & Epoxy Derivatives

Product Type: 2K (2 component) Sealant, Encapsulant, Epoxy Sealant, Potting Compound, Structural Sealant

Application Area: Electrical Components

Compatible Substrates & Surfaces: Aluminum, Metal, Plastics

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Identification & Functionality

Features & Benefits

Applications & Uses

Application Area
Compatible Substrates & Surfaces
Applications & Advantages
  • Excellent thermal cycling performance & thermal shock resistance
  • Resilient, Tough, Durable
  • Low embedment stress on electronics, Low shrinkage
  • UL 94V-0 Rating
  • Antimony Free
  • Halogen Free Flame Retardants
Instruction for Use

MIX RATIO ByWEIGHTVOLUMEKEY Tough-Seal 42Part A53A1 AKEY Tough-Seal 42Part B100 B2 B

Combine Part A and B and mix thoroughly, being careful to limit entrapped air during mixing. Scrape sides, walls and bottom of container. Pour material into part and cure.Bulk meter-mix dispensing machines and convenient cartridges provide air free mixing

Properties

Color
Physical Properties
ValueUnitsTest Method / Conditions
Viscosity at 77°F (25°C)28000cP
Brookfield RVT at 20rpm6
Specific Gravity1.2
Density (lbs/gal)10
Gel Time (100g) at 25°C (77°F)60minutes
Hard Cure at 25°C (77°F)Overnight
Full CureWithin 24-72hours
Accelerated Cure at Mild Heating 66 to 80°C (150-175°F)Yes
Mechanical Properties
ValueUnitsTest Method / Conditions
Hardness vs Temperature -25°C (-13°F)80Shore AD2240
Hardness vs Temperature -75°C (-103°F)90Shore AD2240
Hardness vs Temperature 100°C (212°F)59Shore AD2240
Hardness vs Temperature 120°C (248°F)54Shore AD2240
Hardness vs Temperature 150°C (302°F)49Shore AD2240
Hardness vs Temperature 25°C (77°F)75Shore AD2240
Hardness vs Temperature 5°C (41°F)78Shore AD2240
Hardness vs Temperature 50°C (122°F)65Shore AD2240
Tensile Strength 25°C (77°F) 327psiD638
Hardness vs Temperature 66°C (150°F)63Shore AD2240
Elongation at Break 25°C (77°F)140%D638
Hardness vs Temperature 80°C (176°F)61Shore AD2240
Linear Shrinkage (Upon Cure) 25°C (77°F) max. 0.001in/inD2256
Hardness vs RT Cure 1 Hour at 25°C (77°F)0Shore AD2240
Hardness vs RT Cure 2 Hours at 25°C (77°F)0Shore AD2240
Hardness vs RT Cure 4 Hours at 25°C (77°F)29Shore AD2240
Hardness vs RT Cure 8 Hours at 25°C (77°F)38Shore AD2240
Hardness vs RT Cure 12 Hours at 25°C (77°F)45Shore AD2240
Hardness vs RT Cure 1 Day at 25°C (77°F)55Shore AD2240
Hardness vs RT Cure 2 Days at 25°C (77°F)63Shore AD2240
Hardness vs RT Cure 3 Days at 25°C (77°F)69Shore AD2240
Hardness vs RT Cure 4 Days at 25°C (77°F)69Shore AD2240
Hardness vs RT Cure 1 Week at 25°C (77°F)71Shore AD2240
Hardness vs RT Cure 1 Month at 25°C (77°F)75Shore AD2240
Thermal Properties
ValueUnitsTest Method / Conditions
Heat Capacity,Cp 25°C (77°F) 1.69J/g°KE1461
Thermal Conductivity 25°C (77°F) 0.29W/m°KE1461
Coefficient of Thermal Expansion -65°C to 75°C167ppm/°CE831
Electrical Properties
ValueUnitsTest Method / Conditions
Dielectric Strength at 25°C (77°F)310Volts/milD149
Volume Resistivity at 25°C (77°F)1.2 x 10 12 Ω-cmD257
Dielectric Constant at 25°C (77°F) 1 kHz5.5D150
Dielectric Constant at 25°C (77°F) 1 kHz5D150
Dielectric Constant at 25°C (77°F) 60 Hz5.75D150
Dissipation Factor at 25°C (77°F) 1 MHz0.026D150
Dissipation Factor at 25°C (77°F) 1 kHz0.028D150
Dissipation Factor at 25°C (77°F) 60 Hz0.064D150

Safety & Health

Safety & Handling

Avoid all contact with skin, eyes, clothing and food. Wash thoroughly after handling.

Storage & Handling

Shelf Life & Storage Info

KEY Tough-Seal 42A (PC2042A) 12Months from Date of Manufacture (-18°C to 35°C)

KEY Tough-Seal 42B (PC2042B) 12 Months from Date of Manufacture (-18°C to 35°C)

KEY Tough-Seal 42ABCartridges 12 Months from Date of Shipment (-18°C to 35°C)