Silicone Sealant - excellent adhesive strength. Ideal for use on copper and applications involving large gaps. High temperature resistance. Label-free. LOCTITE® SI 5990 is a non-corrosive silicone sealant and cures on exposure to moisture in the air to form a tough rubber gasket. The nature of LOCTITE SI 5990 reduces the migration of liquid product after application to the part. It has excellent temperature resistance characteristics and can also be used for electrical insulating applications.
LOCTITE SI 5990 is a non-corrosive silicone sealant. It is cured by atmospheric humidity and forms a permanently elastic seal. Due to its thixotropic behavior, LOCTITE SI 5990 reduces migration of the liquid product after application to the part. It offers excellent temperature resistance. Typical applications for this product are those with an operating temperature range up to 350 °C. Health & Safety.