GSA All Purpose Silicone Clear 300ml

The everyday silicone for sealing, weatherproofing and the hundred small gaps that let water and draughts in. Clear, so it disappears into the join.

It's a neutral-cure silicone that cures with moisture in the air to a tough, flexible rubber. It holds across a wide temperature range and shrugs off UV, rain and frost, which is what you want on gutters, flashings, downpipes and aluminium.

300ml cartridge for a standard caulking gun. Temperature range and surfaces are in the tabs below.