Larsen ColourFast Silicone Sealant 300ml

Larsen ColourFast Silicone Sealant is a premium-grade, low-modulus sanitary silicone, colour-matched to Larsen ColourFast 360 grout for a seamless, coordinated finish. Highly flexible and fast-curing, it forms a durable, waterproof, mould-resistant seal around baths, basins, showers, sinks and tiled areas — interior and exterior.

Key features

• Colour-matched to ColourFast 360 grout for a flawless grout-to-seal finish
• Low-modulus & highly flexible – absorbs movement without cracking
• Mould & mildew resistant – stays cleaner for longer in wet areas
• Waterproof, durable elastic seal with low dirt pick-up
• Excellent adhesion to baths, basins, shower enclosures, toilets, glass and glazed tiles
• Fast-curing, premium sanitary-grade silicone
• Interior & exterior sanitary and construction use

Technical specification

Where to use it

Sealing around baths, basins, shower trays and enclosures, sinks, splashbacks, worktops and tile perimeters – anywhere a flexible, watertight, mould-resistant joint is needed.

How to apply

1. Make sure surfaces are clean, dry and free of dust, grease and old sealant.
2. Cut the nozzle to the required bead size and load into a sealant gun.
3. Apply a continuous bead into the joint.
4. Tool to a smooth finish within a few minutes; remove any masking tape before the silicone skins over.

Refer to Larsen's Technical Data Sheet for cure times and full guidance.

FAQ

Does the silicone match the grout? Yes – it's colour-matched to Larsen ColourFast 360 grout, so the seal blends with your grout joints.

Is it mould resistant? Yes – it cures to a mould- and water-resistant finish, ideal for bathrooms and wet areas.

Where can I use it? Baths, basins, showers, toilets, glass and glazed tile surrounds, interior and exterior.

What size is the cartridge? 300 ml – fits a standard sealant gun.