Therefore, they do not need an annealing furnace to cure and can help saving energy costs and additional production stages. The Fermasil 91 silicone foam system with a lower viscosity of up to 25,000 mPa?s has been developed for groove applications and the Fermasil 93 thixotropic system with a viscosity of 80?-?130,000 mPa?s for applications on even or inclined surfaces. The application process takes place with a two-component low-pressure mixing and dosing system from Sonderhoff Engineering. Fermasil 93 has a compression set of < 15 %, while it is just < 10 % for Fermasil 91. The silicone foam sealings can be used at temperatures from - 50 °C to 180 °C, and even up to 350 °C in the short term. The mechanical and chemical properties of the sealings are also maintained under these extreme operating conditions, says Sonderhoff.