Silicone Gaskets
Silicone gaskets are used most often in applications that require resistance to extreme temperatures, as they are able to operate normally in temperatures ranging from -100 degrees Celsius up as hot as 250 degrees Celsius.
Silicone is also naturally UV-resistant, making silicone gaskets a popular choice for outdoor uses. There are types of silicone that are UL-94V0 rated, a must for transit and electronic uses. Silicone also performs very well in compression tests.
Silicone gaskets are versatile and available in a number of varieties of the material, including reinforced silicones, high tear strength silicones, and electrically and thermally conductive silicones.
Silicones are divided into two categories based on their processing methods: silicone foam and silicone sponge. Silicone sponge is made from a silicone gum compound that is mixed with pigment, catalyst and blowing agent, then heat-cured. The final product is closed-cell silicone sponge, which has the best properties for efficient sealing, even when exposed to rough weather conditions. Open-cell and closed-cell silicone foam are made from liquid silicone which is catalyzed, mixed, cast, and cured, resulting in a continuous roll. Silicone gaskets are made from an uncured blend of a silicone compound that is applied to the mating parts and allowed to cure after assembly.