Essex · England
Mastic man in Colchester
Sealant work across Colchester, from Dutch Quarter cottages and Lexden houses to Highwoods, the Garrison homes and student lets near the university.
- Anti-fungal silicone as standard
- 20+ years in the trade
- Guaranteed for a year
Resealing and mastic work across Colchester
Colchester became a city in 2022, and it has one of the widest spreads of housing in Essex: historic streets inside the old walls, Victorian and inter-war suburbs, large post-war and 1980s estates, and new neighbourhoods on former army and hospital land. Mr Mastic is based in Crawley and covers Colchester and the villages around it, coming up the A12.
We reseal baths, showers, kitchens and basins, replace mastic around windows and doors and seal external joints. A good seal in a busy bathroom lasts years, not months, if the old material is fully removed and the joint is dry before the new bead goes in. Our guide to how long silicone sealant lasts explains what shortens its life.
Historic quarters, big estates and former army land
North of the High Street, the Dutch Quarter has more than 60 historic houses, several of them listed, and Lexden Village has its own conservation area. Older houses like these have walls and floors that move, and bathrooms squeezed into small rooms. We often find several layers of old sealant on top of each other, which all have to come out before a lasting joint can be made. Where a bath has dropped slightly on an old floor, we pack the gap first so the new bead isn’t stretched thin.
Greenstead is Colchester’s largest estate, and Highwoods was built in the early 1980s, with the first owners moving in around 1983. Homes from that time are now on their second or third set of sealant, and window and patio door mastic laid decades ago has usually hardened and pulled away from the brick.
Newer homes have arrived in large numbers. The Garrison area has new housing on roads such as Roberts Road, Sergeant Street and Garrison Parade, Severalls Hospital was replaced with more than 700 homes after it closed in 1997, and Stanway has the Lakelands development. In new builds, sealant often fails in the first year or two as the house settles, and we cut it out and reseal it properly.

Riverside flats, university towers and student lets
The Hythe has been changing from an old port into a residential area, with new blocks of flats by the River Colne. On the University of Essex campus at Wivenhoe Park, six 1960s towers remain a local landmark. Blocks and towers bring practical questions: booking a parking space, using lifts, and making sure a failed shower seal is dealt with before it reaches the flat below. We can liaise with managing agents and residents so the job runs smoothly.
Exposed riverside and upper-floor windows take a lot of wind-driven rain, and the mastic around them works hard. We use a flexible, weatherproof sealant with backing rod where gaps are deep, and our external joints page explains how we seal brick, render and frames outside.
Student houses, healthcare and retail parks
With the university nearby, Colchester has many shared houses and student flats, where bathrooms get heavy use and need resealing between tenancies. Our landlord sealant service is set up for agents and landlords who need quick turnarounds.
Colchester Hospital serves the area, and care homes, surgeries and clinics around the city need sealant that is easy to keep clean. Retail and leisure sites at Tollgate, Stane Retail Park and the Northern Gateway have customer washrooms and food areas, and we can work outside opening hours. Hotels and guest houses in the city see the same heavy bathroom use, and we reseal them room by room so rooms are back in use quickly.
How a job runs
- Get in touch. Call or email with the job, your postcode and a few photos if you have them.
- Quote and booking. We quote clearly before anything starts and fix a day that works for you.
- Preparation first. Old sealant out completely, surfaces cleaned, mould treated and the joint left dry.
- Seal and finish. The right sealant for each joint is applied and tooled to a neat, even finish.
- Cure and guarantee. We tell you when it can be used, and every job has our one-year guarantee.
Our services in Colchester
- Bathroom & kitchen resealing: Bathroom and kitchen joints taken back to a clean, dry surface and finished with fresh anti-fungal silicone that won’t lift.
- Window & door mastic: Frame perimeters inside and out resealed with flexible, colour-matched sealant, with backing rod where the gap is deep.
- Commercial & hotel sealant: Sealant programmes for offices, hotels, care settings and schools, with early or late working where it helps.
- Remedial sealant & repairs: Leaks and lifting beads from earlier sealant jobs put right, starting with finding out why they failed.
- Fire-rated sealant: Fire-rated sealant for service penetrations and frame gaps where it has been specified, applied to the tested details.
- External & façade joints: Split or perished joints in walls and cladding replaced with exterior sealant designed to stretch with the building.
- New-build mastic & snagging: Snagging sealant for new homes and plot-by-plot mastic for builders and developers.
- Floor & skirting joints: Skirting-to-floor gaps, tiled floor movement joints and concrete floor joints sealed with the right product.
- Regrouting: Crumbling grout in showers and wet areas raked out and refilled, so water stays out of the wall behind.
- Glazing & conservatory sealant: Conservatory, rooflight, glass panel and shower screen joints resealed with glazing silicone.
- Gutter, fascia & soffit sealing: Gutter unions, outlets and fascia joints that leak in heavy rain cleaned and resealed.
- Sand mastic for sash & case windows: Sash and case window surrounds in stone and brick re-pointed with traditional sand mastic.
Choosing a mastic man in Colchester
Colchester is a fair way from our Crawley base, so we plan each visit to get the job done properly in one trip. You’ll be dealing with a fully insured firm with over 20 years’ experience and ARBOMaster approved applicator status, using Arbo and Everbuild sealants. We’ve completed 2,847+ projects and hold a 4.9-star Google rating from more than 180 five-star reviews. A clear quote comes first, and a one-year guarantee follows the finished job.
Around Colchester
For trains, Colchester Town station is closest to the centre. Places most people will know nearby are Lion Walk (less than half a mile south-east), Social History Museum (less than half a mile south) and Colchester Castle (less than half a mile east). Closer in, we work on homes, rented flats and businesses near St John's Green Primary School, Colchester Sixth Form College, Church of St Peter and The Bay And Say Public House. For open space, Westhouse Wood is close by.
What customers say
Rated 4.9 on Google from 180+ five-star reviews. Read the reviews on Google.
“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.”
“1950s terrace on Crossways — bath had black mould coming back constantly. Mr Mastic stripped it all back and did it properly. Bathroom looks brand new.”
“New build in Forge Wood — shower seal had failed after 16 months. Mr Mastic came out quickly, removed everything and did it properly. Perfect finish and no more leaks.”
Neighbourhoods we cover in Colchester
Find your area below, or call 07833 053749 or email us with your postcode and a few details.
- Abbey Field
- Beacon End
- Berechurch
- Braiswick
- Camulodunum
- Crockleford Heath
- Great Horkesley
- Greenstead
- Lexden
- Mile End
- Old Heath
- The Hythe
- West Bergholt
Other towns around Colchester
Questions from Colchester
Do you cover all of Colchester?
Yes. We cover the city centre, the Dutch Quarter, Lexden, Stanway, Highwoods, Greenstead, Mile End, the Hythe, Berechurch and the Garrison area, plus nearby places such as Wivenhoe.
Can you reseal bathrooms in student houses between tenancies?
Yes. We work with landlords and agents to reseal baths, showers and kitchens in the gap between one tenancy and the next.
The sealant in my new Severalls or Garrison home has cracked. Is that normal?
It’s common in new homes as they settle. We remove the builder’s sealant, prime where needed and reseal.
Can you seal around windows on an upper-floor flat?
We can reach most windows from inside or with standard access. For high-rise work we’ll talk through access with you or the managing agent first.
Do you work in care homes and clinics?
Yes. We use anti-bacterial and anti-fungal sanitary silicone and can work around residents and patients.
Can you seal over the old sealant?
No. New silicone won’t bond properly to old silicone, so we always remove the old bead completely first.
How soon can I use the shower?
Usually after around 24 hours. We’ll confirm the cure time for the product we used.
