Hylomar Hylosil Instant Gasket Sealant – 40ml (F/SL303HY/040M)

Description

Genuine Hylomar · Part no. F/SL303HY/040M

Safety: Danger. Causes skin irritation. Causes serious eye damage. Read the label before use.

Hylomar Hylosil Instant Gasket Sealant is a 40ml tube of clear, engineering-grade silicone that forms a gasket in place and stays permanently flexible. It fills gaps up to 4mm, works up to 250°C, resists most automotive fluids, and sticks to glass, metal, wood and plastics, so it serves beyond the engine too.

Good to know

• How big a gap can it fill? Up to 4mm, so it copes with flanges that aren't perfectly flat as well as replacing cut gaskets; a wider gap means the parts need attention first.
• Is it the same as Hylomar Universal Blue? No: Blue is a non-setting jointing compound, while Hylosil is a silicone that cures to a flexible, rubbery seal, from the same maker.
• When can the engine run? Once the silicone has cured, so allow the time on the tube before refilling oil or coolant; clean and degrease both faces before applying for the bond to hold.

Which one?

Sensor-safe and rated to 300°C: Q-Bond Ultra Strong Gasket Maker (QB7GM). Granville's clear acetoxy silicone in a tube: Granville Instant Gasket (0233).

Key features

• 40ml tube
• Clear engineering-grade silicone
• Fills gaps up to 4mm
• Up to 250°C
• Bonds glass, metal, wood and plastics

Specification