Free Uk Delivery
On Orders above £60
60 Day Returns
Free Expert Advice
No Leak Guarantee
01209 202944
Castrol Bike
Loctite SI 5660 Silicone Sealant - Grey

Loctite SI 5660 Silicone Sealant - Grey

Loctite SI 5660 Sealant - 100ml



Checking Stock



Add To Basket

  • Description
  • Benefits
  • Technical Info
  • Shipping Explained

Loctite SI 5660 Silicone Sealant - Grey

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 this sealant 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, although it is ideal for a variety of applications involving large gaps.

The product has leading health and safety features.

PDF Downloads:

Download the Technical PDF


  • Flange sealant for flexible flanges
  • Excellent water/glycol resistance
  • Oil resistant
  • Leading in health & safety features
  • Label-free
  • Excellent adhesive strength
  • Ideal for applications involving large gaps

Technical Information:

Cure Through Volume2.5 mm
Cure Through Volume Time24 hr.
Gap Fill1 mm
SubstratesMetal, Plastic
Tensile Shear Strength1.8 N/mm²


SHIPPING IS FREE* for orders of £60 and over , regardless of the weight of your order.
We've tried to keep all other shipping costs as low as we can.

Carriage starts at just £0.95 (inc VAT) for small items, with our most common courier rate set at £4.99 for orders of 5kg (enough for 5 litres of oil).

  • *Free shipping is available for UK Royal Mail, UPS Access Point™ (click & collect) and standard UK courier services (not express / priority / islands).
  • Courier surcharges mean we are unable to offer free "to the door" courier shipping from us in Cornwall up to Highlands / Grampian in Scotland - and because we send a lot of liquids, not every courier option is available to us. UPS Access Point™ (click & collect) is available as a free shipping option across Scotland, Wales and England, wherever there is a UPS Access Point™ Location.
  • Carriage charges are based on weight - please see our table of carriage costs for full details (although adding an item to your cart and viewing the calculated carriage is often easier!).
  • Priority shipping is also available.

How long will it take to get my order?

We give an estimate of delivery dates as you shop and in your basket. The vast majority of items are held in stock and dispatched from our UK warehouse and we'll do all we can to get your order to you as quickly as possible.

Share this product:

Review Opie Oils

Review Stars

Rated Excellent