Loctite SI5660 Silicone Sealant – Grey – 100ml (2064521)

Name: Loctite SI5660 Silicone Sealant - Grey - 100ml (2064521)
Brand: Loctite
SKU: LOC-2064521
Price: 20.69 GBP
Availability: InStock

£20.69 inc. VAT

9 in stock

Next-day delivery Order by 1pm Monday and it’s with you on Tuesday.

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100ml grey gasket silicone
For gearboxes and cast housings
Oil and coolant resistant

Next-day UK delivery £3.99 (order by 1pm Mon–Fri), or free click & collect from our Bulwell shop — 2–4 Carey Road, NG6 8AT. Choose collection at checkout, then pick it up any time in opening hours (Mon–Fri 9–5:30, Sat 9–1) — just quote your order number.

Next-day UK delivery £3.99 (order by 1pm Mon–Fri). Home delivery only: click & collect isn’t available for this item. With items from our shop in the same order, delivery is £5.99 (two parcels).

SKU: LOC-2064521 Category: Fillers, Sealants & Adhesives Brand: Loctite

Description
Additional information

Description

Genuine Loctite · Part no. 2064521

Safety: Warning. Suspected of causing cancer. Read the label before use.

Loctite SI5660 is a 100ml grey silicone sealant made for gasketing where oil and coolant resistance matter, typically on transmissions and cast metal housings. It cures with moisture from the air into a tough rubber gasket and resists water and glycol, so it suits gearbox casings, axle covers and coolant-wetted housings.

Good to know

Why choose this for a gearbox? It is made for transmissions and cast housings, where joints see gear oil and some movement; a general silicone may not last as long there.
Will it handle coolant joints? Yes, it is water and glycol resistant, so it suits housings that carry antifreeze as well as oil.
How do I prepare cast faces? Scrape off all old sealant without gouging the casting, degrease, and dry; lay a thin, even bead inside the bolt holes.
When can I refill the oil? Give it time to cure before filling and running; follow the curing time on the tube.

Which one?

For pressed steel sumps and covers with big gaps or joint movement, Loctite SI5980 Silicone Flange Sealant – Black (2064235) is designed for that; for a smaller multipurpose tube, Loctite SI5926 Silicone Instant Gasket – Blue (1123349).