Henkel launches “next generation” PU potting solution

Henkel is responding to the need for reliable potting compounds for use in corrosive environments with the launch of Loctite Stycast US 8000 A/B, a next generation two component polyurethane potting compound designed to deliver exceptional electrical insulation, mechanical durability, and long term reliability in demanding environments. This new solution strengthens Henkel’s portfolio of high performance encapsulation materials and supports customers seeking enhanced protection for mission critical industrial and power electronics assemblies.

Loctite Stycast US 8000 A/B is engineered for reliability from the inside out. Its ultra low ionic content (<20 ppm) minimizes corrosion and prevents silver migration in high humidity environments — one of the leading causes of leakage currents and short circuits. With a UL 746 RTI rating of 140°C and UL 94 V 0 flammability certification, the material provides proven thermal endurance and safety. Electrically, its dielectric strength of 24 kV/mm and surface insulation resistance above 10⁸ Ω after 500 hours at 85°C/85% RH ensure long term insulation stability even under extreme environmental stress.

Thanks to its low mixed viscosity (3,800–5,800 mPa·s) and standard 4:1 mixing ratio, Loctite Stycast US 8000 A/B offers smooth, consistent dispensing and excellent flow into narrow gaps and complex geometries — supporting void free encapsulation and efficient high volume manufacturing. Its ability to cure at room temperature or through accelerated heat schedules enables process flexibility and reduced energy consumption. Mechanically, the material delivers a balanced combination of strength and flexibility, with Shore A hardness of 89, 9 MPa tensile strength, and 87% elongation, allowing it to absorb vibration and thermal expansion without cracking or losing adhesion.

“At Henkel we are committed to enabling the next generation of reliable, energy efficient electronic systems. With the launch of Loctite Stycast US 8000 A/B, we are expanding our advanced protection portfolio to support customers facing increasingly harsh environmental and compliance requirements,” said Eric Zhai, global senior market strategy manager for power and industrial automation at Henkel Adhesive Technologies.

“Through close partnership with our customers, Henkel is delivering materials that drive reliability, compliance, and long term sustainability,” continued Zhai. “Loctite Stycast US 8000 A/B is a powerful example of how innovations can rapidly progress from concept to production — helping manufacturers reduce field failures, extend product lifetimes, and meet the growing demands placed on modern electronic systems.”

Photo: © Henkel

Loctite Stycast US8000 AB (in German)