Surrey · England
Mastic man in Guildford
Bathroom resealing, window mastic and commercial sealant for Guildford’s Victorian suburbs, interwar garden village, student lets and town-centre offices.
- Old sealant cut out, never covered
- ARBOMaster approved
- One-year guarantee on every job
Your local mastic man for Guildford
Guildford mixes a historic county town with a university, a big hospital and a busy business park, so the sealant work here is varied. Mr Mastic covers Guildford from our base in Crawley, working in Merrow, Burpham, Stoughton, Onslow Village and the town centre on baths, showers, kitchens, windows, doors and outside joints.
We never seal over old silicone. Then we choose a sealant for the place it’s going: anti-fungal silicone in a shower, food-safe near a sink, flexible weatherproof mastic outside. If you want the new bead to match grey grout, coloured tiles or a cream bath, we offer colour-matched resealing too.
Charlotteville, Onslow Village and the growing suburbs
Guildford’s housing tells the story of its growth. Charlotteville, laid out from 1862, was one of the first planned suburbs in Britain, and its heart is now a conservation area. Victorian houses there often keep timber windows and painted joinery, where the joint between frame and brick needs a sealant that stays flexible and can be painted. On traditional sash windows, our page on traditional sand mastic explains a long-lasting option.
After the First World War, Onslow Village was planned as a garden city; only around 600 houses were built, and parts of it are also designated. Westborough followed in the 1920s and Dennisville in 1934, and Merrow and Burpham grew from villages into large suburbs. Many of these interwar and post-war homes now have their second or third bathroom, and we often find bath seals torn where the bath has moved, or uPVC windows whose mastic has hardened and cracked.
Newer homes add their own work. The old Stoughton barracks were redeveloped for housing in the 1990s, and newer flats and estates continue to appear around the town. Developer sealant in these homes often cracks in the first year or two as everything settles and dries.

Hills, sun and shade around the Wey
The River Wey runs through the middle of town, and much of Guildford is hilly, so some homes face full sun on one side and shade and damp on the other. Sun-baked south-facing frames dry their mastic out and make it brittle; shaded, damp walls hold moisture against joints. Older timber frames also swell and shrink through the year. We match the sealant to the frame and the exposure so it moves with the joint instead of splitting.
University, research park, hospital and hotels
The University of Surrey, established in Guildford by Royal Charter in 1966, brings a large student population, and with it halls, shared houses and plenty of rented flats. Shared bathrooms see heavy use, and seals need renewing between lets; our landlord’s guide to sealant sets out what to check.
Surrey Research Park is home to technology firms and offices with washrooms, kitchens and glazing that need sound joints. The Royal Surrey County Hospital at Park Barn sits nearby, along with care homes and clinics across the town, and Guildford’s hotels and guest houses need bathrooms turned around quickly. We can work out of hours and room by room.
How it works
- 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.
- Cut out and prepare. All the old sealant comes out, and the joints are cleaned, treated and dried.
- Lay the new bead. We apply the right product for each joint and tool it to a clean, even line.
- Cure and guarantee. We tell you when it can be used, and every job has our one-year guarantee.
Our services in Guildford
- Bathroom & kitchen resealing: Every joint in the bathroom and kitchen, from the bath edge to the worktop, stripped back and resealed with anti-fungal silicone.
- Window & door mastic: Cracked or shrunken mastic around window and door frames, sills and patio doors replaced with a weatherproof sealant.
- Commercial & hotel sealant: Commercial washrooms, kitchens and wet areas resealed floor by floor, so only a few rooms are out of use at once.
- Remedial sealant & repairs: Leaks and lifting beads from earlier sealant jobs put right, starting with finding out why they failed.
- Fire-rated sealant: Gaps in fire-separating walls and floors sealed with fire-rated products, following the tested details for each one.
- External & façade joints: Expansion joints in brick, render and cladding cut out and renewed at the right depth so they can move without splitting.
- New-build mastic & snagging: Failed builder sealant in new homes put right, and plot mastic for developers.
- Floor & skirting joints: Floor and skirting joints in homes, shops and warehouses sealed neatly and to the right depth.
- Regrouting: Shower and splashback grout replaced where it has cracked or stained, with silicone in the movement joints.
- Glazing & conservatory sealant: Leaking conservatory and rooflight joints, glass panels and shower screens resealed with silicone made for glass.
- Gutter, fascia & soffit sealing: Leaking gutter joints, end caps, fascia and soffit joints resealed with exterior sealant.
- Sand mastic for sash & case windows: Traditional burnt sand mastic renewed around sash and case windows and doors in stone and brick.
What you get with Mr Mastic in Guildford
Guildford homes and businesses get the same careful method we use everywhere. Behind it sits over two decades of sealant work, more than 2,847 completed projects and a 4.9-star Google rating built on 180+ five-star reviews. We’re fully insured, ARBOMaster approved and use Arbo and Everbuild products chosen for each joint. There are no surprises on cost: you’ll have a clear quote before we begin, and every finished job comes with a one-year guarantee.
Around Guildford
From the centre, the nearest railway station is London Road (Guildford) station. Local landmarks include Guildford House (0.8 miles south) and Guildford Castle (0.9 miles south). Around the centre, our work takes us to homes, rentals and businesses close to Sandfield Primary School, Guildford High School, Surrey Maths School and Church of St John the Evangelist. Green spaces within reach include Pewley Down and Pewley Hill.
What customers say
Rated 4.9 on Google from 180+ five-star reviews. Read the reviews on Google.
“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.”
“Harper Drive in Maidenbower — kitchen worktop had been leaking behind for a while. Came out the next day, sorted it properly. Really tidy job.”
“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.”
Where we work in Guildford
Choose your part of town for local details, or call 07833 053749 or email us and tell us your postcode.
- Abbotswood
- Artington
- Bellfields
- Burpham
- Chilworth
- Fairlands
- Jacobs Well
- Merrow
- Onslow Village
- Shalford
- Stoughton
- Sutton Green
- Westborough
- Wood Street Village
- Worplesdon
Other towns around Guildford
Questions from Guildford
Do you cover all of Guildford?
Yes. We cover the town centre and suburbs such as Merrow, Burpham, Stoughton, Park Barn and Onslow Village, plus nearby villages.
I let rooms to students near the university. Can you reseal between tenancies?
Yes. We reseal shared bathrooms and kitchens for landlords and letting agents, and can fit work into the summer changeover.
Can you seal around sash windows in a Charlotteville house?
Yes. We use flexible or paintable mastic to suit the frame, and can discuss traditional traditional sand mastic where it fits.
Can you match the sealant to coloured grout or a coloured bath?
Yes. We offer colour-matched sealant so the new bead blends in with your tiles, grout or sanitaryware.
Can you work on offices at Surrey Research Park outside working hours?
Out-of-hours working can be arranged for commercial jobs, so staff areas are back in use when people arrive.
Do you reseal hotel rooms in Guildford?
Yes. We work room by room so rooms go back into service as soon as the sealant has cured.
