Silicone Tri-Clamp/ Tri Clover Gaskets Silicone Tri-Clamp Gaskets are intended to be used when using alcohol as an extraction solvent instead of butane or propane. Silicone has an excellent chemical resistance to alcohols and is the preferred gasket material when using Jacketed Reactors or Tri-Clamp Buchner funnels for post-processing winterization because they have very low extractable characteristics. Silicone gaskets also offer a very good temperature range and will retain their original | BVV Silicone Tri-Clamp Gaskets.