Mr Mastic · South East, London and Scotland
Colour-matched resealing
White isn’t always right. We reseal with clear, grey, black or a colour chosen to suit your tiles, grout, worktop or frames.
- Dark tiles or grout
- Stone and coloured worktops
- Coloured window frames
When colour matching helps
- Dark or patterned tiles, where a white bead stands out
- Grey or coloured grout, where the sealant should match the grout lines
- Stone, wood-effect and coloured kitchen worktops
- Grey, black and coloured uPVC or aluminium window and door frames
- Natural stone around fireplaces and on outside walls
How we match the colour
Sealant comes in a wide range of colours. We look at the tiles, grout, worktop or frame in daylight, choose the closest match from the ranges we use and, where it helps, show you before we start. On some surfaces clear sealant is the best match, though it shows dirt underneath more, so the joint has to be perfectly clean first. Our guide to coloured sealant and colour matching explains the options.
Real colour-matched jobs
At a kitchen in Harper Drive, Maidenbower, Crawley, we replaced 30-year-old shrunken sealant along the worktop with a colour-matched sanitary silicone, using a food-safe product beside the sink, and finished the same day.
Same preparation, any colour
Whatever the colour, the old sealant comes out completely, the joint is cleaned and dried, and the new bead is tooled neatly. Colour is a finish; preparation is what makes it last. See silicone removal.
What it costs
Our mastic calculator gives a guide price straight away. The exact price depends on how much old sealant has to come out, mould, how many joints there are and whether anything else needs doing on the same visit. Call or email with a few details (photos help) and we’ll give you a clear quote before any work starts.
What customers say
Rated 4.9 on Google from 180+ five-star reviews. Read the reviews on Google.
“Called for a bathroom reseal and the mastic man showed up on time with all the right equipment. Brilliant attention to detail. The sealant looks perfect and they kept everything tidy.”
“We had old mastic that needed replacing throughout our kitchen and bathrooms. The mastic man professional was knowledgeable, quoted fairly, and delivered excellent quality work. Highly recommend!”
“Professional mastic man service from start to finish. They assessed the work properly, gave a clear quote, and executed the job perfectly. Very satisfied with the results.”
Colour-matched resealing: common questions
Can you match grey grout?
Yes. We choose a grey sealant that matches your grout as closely as possible.
Is clear sealant a good choice?
Sometimes. It hides well on glass and some surfaces, but anything underneath shows through, so preparation matters.
Do you colour-match window mastic?
Yes. We match frames and walls outside too; see window and door mastic.
Is it guaranteed?
Yes. Every job comes with our one-year guarantee.

