LOCTITE SI 5660

Gasketing Products

Silicone Sealant - excellent adhesive strength. Ideal for applications involving large gaps. Label-free. Excellent resistance against water/glycol.

LOCTITE SI 5660 is a silicone sealant and cures on exposure to moisture in the air to form a tough rubber gasket. The nature of LOCTITE SI 5660 reduces the migration of liquid product after application to the part. It has been designed especially for gasketing applications where good resistance against oils and coolants is required. Typical applications include transmissions and cast metal housings. The product has leading health and safety features.


  • Flange sealant for flexible flanges
  • Excellent glycol resistance
  • Oil resistant
  • Grey colour
  • Leading in health & safety features