Tough-Seal

Tough-Seal is bulldog tough and bred to grip and protect, under the most aggressive conditions.
tough-seal label design

Tough-Seal is a superior family of KEY sealants for potting electrical and electronic components that provides a reliable grip and exceptional encapsulating protection for any potting application where premium thermal cycling performance, excellent thermal shock resistance, and outstanding environmental and corrosion protection are a must.

Eight Formulations

Which Tough-Seal is Right For You?

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.

Tough-Seal Comparison Table

Tough-Seal vs. Other Potting Compounds

Tough-Seal is a RoHS Compliant, easy-to-mix, two component durable hybrid epoxy elastomer that offers a unique combination of KEY properties not commonly found in just one potting compound. It offers the heat resistance of an epoxy, the flexibility of a urethane and the durable encapsulating protection of a silicone. ToughSeal is not a urethane, so it is isocyanate-free and it is not moisture sensitive.

With exceptional flexibility at temperatures as low as -103°F (-75°C) and high temperature resistance up to 302°F (150°C). Tough-Seal grips in the cold, when other potting compounds contract, and maintains a tough seal in the heat, when other potting compounds wilt. Tough-Seal does not crack, so electronic components remain protected from moisture. When exposed to moisture, Tough-Seal also offers Anti-Microbial protection. Tough-Seal does not support fungal growth and meets the requirements of MIL-STD-810G Method 508.6.

With very low exotherm in large volume pours, extremely low shrinkage, and little to no expansion or contraction with temperature changes, ToughSeal is gentler on sensitive circuitry, than hard epoxies, delivering low embedment stress upon cure and during thermal cycling.

Tough-Seal provides durable encapsulating protection that guards electrical components from exposure to the harmful effects of the environment better than typical epoxies, urethanes and silicones.

Key Tough-Seal Properties:

  • Faster and Longer Working Times
  • Isocyanate-Free / Not Moisture Sensitive
  • Low Embedment Stress
  • Exceptional Moisture Protection
  • Minimal Expansion & Contraction with Temperature Changes
  • Excellent Low Temperature Flexibility from -103°F (-75°C)
  • High Temperature Resistance up to 302°F (150°C)
  • Excellent Thermal Shock Resistance
  • Strong Adhesion to Thermoplastics & Wire Insulation
  • Aggressive Aluminum Adhesion
  • Anti-Microbial – MIL-STD-810G Method 508.6
  • RoHS Compliant
  • Faster and Longer Working Times
  • Isocyanate-Free / Not Moisture Sensitive
  • Low Embedment Stress
  • Exceptional Moisture Protection
  • Minimal Expansion & Contraction with Temperature Changes
  • Excellent Low Temperature Flexibility from -103°F (-75°C)
  • High Temperature Resistance up to 302°F (150°C)
  • Excellent Thermal Shock Resistance
  • Strong Adhesion to Thermoplastics & Wire Insulation
  • Aggressive Aluminum Adhesion
  • Anti-Microbial – MIL-STD-810G Method 508.6
  • RoHS Compliant

Read More About Tough-Seal

Tough-Seal Solves Problems

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

Read More
Tough-Seal Cures

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.

Read More
Tough-Seal Performs

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

Read More

Order your Tough-Seal Evaluation Kit Today!

Your Evaluation Kit will include everything you need to perform your own high quality product evaluation for your application.

Evaluation Kit – Tough-Seal