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Loctite SI 5940 Silicone Sealant - Black

Loctite SI 5940 Silicone Sealant - Black

Loctite SI 5940 Sealant - 310ml



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  • Description
  • Benefits
  • Technical Info
  • Shipping Explained

Loctite SI 5940 Silicone Sealant - Black

Loctite SI 5940 is a black, 1-part, room temperature vulcanising acetoxy silicone paste sealant. It is primarily used as a general-purpose sealing and bonding agent, space-filling rubber adhesive or formed-in-place gasket. It adheres to clean metal, glass, most non-oily woods, silicone resin, vulcanised silicone rubber, ceramic, natural and synthetic fibre and many painted and plastic surfaces.

This product is ideal for automotive, household electrical and aerospace applications.

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  • Excellent resistance to ageing, shrinkage, cracking and discolouring
  • Solvent-free
  • Cures on exposure to moisture in the air to form a tough, flexible, waterproof, oil-resistant silicone rubber bond
  • Typically used in applications with an operating range of -50°C to +200°C and can intermittently reach temperatures up to +220°C
  • Tack-free in 5 minutes

Technical Information:

Chemical Basis / BaseAcetoxy Silicone
Cure Through Volume6 mm
Extrusion Rate200 g/min.
Fixture Time30 min.
Fixture Time Temperature30 °C
Gap Fill6 mm
Key CharacteristicsThixotropic
Physical FormPaste
SubstratesCeramic, Composite, Glass, Metal: Aluminum, Metal: Steel, Plastic
Tensile Shear Strength1.3 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.

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