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Loctite SI 5660 Grey RTV Silicone Sealant

Loctite SI 5660 Grey RTV Silicone Sealant
Loctite SI 5660  is a Silicone Sealant - excellent adhesive strength. Ideal for applications involving large gaps. Label-free. Excellent resistance against water/glycol. Read more
From £4.75 excl VAT
(£5.70 Inc VAT)

Product Information

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


  • Loctite SI 5660
  • Grey RTV Silicone Sealant
  • Supplied in various sizes

Specifications and Information

Technical Information

Product Code
Commodity Code
Country Of Origin

Document Downloads

Sil-Mid Limited DO NOT GUARANTEE that the information in these documents is the most up to date information available from the manufacturer, there are times when updated information is released and we are not made aware immediately.

Delivery information

Orders over £50 placed online will now qualify for FREE UK Mainland delivery*

Orders under £50 placed online for UK Mainland delivery is £8.00*

**Orders requiring Pre 10.00am Next Day delivery has also been lowered from £35.00 to £21.00, orders placed through the office will incur additional charges.** 

International delivery (door to door delivery) is available for selected countries worldwide. Shipping will be automatically calculated based on the weight, location and hazardous nature of the goods. Customers can also choose ex works to arrange their own collection.

Please refer to our delivery page for more information.