Shower resealing

What a shower reseal covers

A shower has more joints than people expect, and a leak can start at any of them:

• the joint between the shower tray and the walls
• the vertical joints where the enclosure or screen profile meets the tiles
• the bottom joint where the screen or door meets the tray
• joints around the valve, riser rail and shelves, where they need it

We cut out the old silicone from each joint, clean and dry it, treat any mould and reseal with anti-fungal sanitary silicone. Most single showers take a couple of hours.

Why showers leak at the sealant

A shower tray takes the full weight of someone standing in it, every day, and any movement in the tray works the sealant joint around it. Steam and splashing keep the joints damp for hours, which is how mould gets into the silicone. And in new homes, sealant is often applied in a hurry onto dusty or unprimed surfaces. Once a joint has a gap, water runs behind the tiles or under the tray, which is why a shower leak often shows up as a stain on the ceiling below before you see anything in the bathroom.

A real shower reseal: Forge Wood, Crawley

At a new build in Forge Wood, Crawley, the shower tray seal had failed after 16 months and water was getting under the tray. The developer’s sealant had gone onto a gritty, unprimed surface. We took out the tray perimeter and all the enclosure joints, primed the surfaces and resealed with sanitary silicone. The customer: “Mr Mastic came out quickly, removed everything and did it properly. Perfect finish and no more leaks.”

When it isn’t the sealant

A cracked tray, a tray that rocks because its base has failed, a leaking shower valve or waste, or failed tanking behind the tiles won’t be fixed by resealing. We check the tray is firm before we reseal, and if the problem is something else we’ll tell you. Our guide to whether a shower leak is the sealant has simple checks you can do first.

Frameless screens and wet rooms

Frameless glass screens need the joint where the glass meets the wall and floor resealed with a silicone suited to glass and wet areas. In a wet room, the floor-to-wall joints sit in standing water, so they need anti-fungal sanitary silicone and careful preparation. We reseal the visible joints; tanking under the floor is a different job.

Looking after a resealed shower

Leave the new sealant for the full cure time before using the shower (usually around 24 hours). After that, run the fan, squeegee or wipe the screen and tray edge after use, and clean with a mild cleaner. See how long to wait after sealing.

Shower resealing near me

Searching for shower resealing near you? We cover London, the South East and all of Scotland, from city flats to village homes. Pick your town below, see all areas, or call and tell us your postcode.

What it costs

It depends on how many joints there are, how much old sealant has to come out, mould, and whether the screen joints need doing too. Call or email with a few details (photos help) and we’ll give you a clear quote before any work starts.