Mastic Man High Wycombe: Window, Bathroom & Commercial Sealant
From hillside terraces to Cressex trade units, we are the mastic man and sealant contractor High Wycombe homeowners, landlords and builders call for neat, long-lasting mastic and silicone sealant.
- From Bedford
- About 37 miles, via the M1 and M40
- Villages on this page
- 14
- Typical work
- Terraces, flats & commercial units
- We work for
- Homeowners, landlords & builders
Sealant work in a busy Chilterns valley town
High Wycombe climbs both sides of the Wye valley, and that mix of streets gives a mastic man plenty of variety.
Victorian and Edwardian terraces around Totteridge, Desborough and Bowerdean have sash replacements and bays where the old window mastic has shrunk away from the brick. Downley, Hazlemere and Terriers have larger semis and detached homes, many with uPVC frames sealed fifteen or twenty years ago and now overdue for re-mastic work.
Down in the valley bottom, the Cressex and Sands industrial estates, new apartment blocks near the station and retail units in the town centre need commercial sealant: movement joints, cladding perimeters and shopfront glazing. As a sealant specialist covering High Wycombe, we handle both the domestic and the commercial side.
Chair-making made High Wycombe famous, and some former furniture works around Oakridge and Desborough Road are now flats with large original openings. Those big frames move more than ordinary windows, so they need a joint designed for movement rather than a thin smear.

Mastic and silicone sealant services in High Wycombe
Bathroom resealing High Wycombe
Bath, shower and basin silicone fully cut out, cleaned and replaced with anti-mould sanitary silicone, not smeared over the top.
Bathroom resealing →Window & door mastic
External mastic around uPVC, timber and aluminium frames raked out and renewed, colour-matched to brick, render or frame.
Window & door mastic →Kitchen sealant
Worktop, upstand and sink silicone replaced cleanly, from oak and laminate to quartz and granite.
Kitchen sealant →Commercial sealant contractor
Shopfronts, cladding, curtain wall and façade joints for industrial and retail units in the valley.
Commercial mastic →Expansion & movement joints
Brick, block and concrete movement joints resealed with polyurethane sealant and the right backer rod.
Expansion joints →Landlords & letting agents
Rented flats and HMOs resealed between tenancies, so rooms are ready on time.
More High Wycombe services: kitchen sealant · concrete joint sealing · window and door mastic · bathroom and shower resealing · expansion and movement joints · façade and curtain wall sealing
Re-mastic windows and doors on hillside homes
Homes on the steep streets of High Wycombe take wind-driven rain head on, and failed window and door mastic is often the first place water gets in. We cut out the old sealant, prepare the joint and apply a low-modulus silicone or polyurethane sealant that can move with the frame.
Where gaps are deep we fit backer rod first, so the joint is the right depth and will not tear. On render and painted brick we pick a colour that blends in, rather than a thick white line.
- Old window mastic removed completely
- Backer rod fitted where joints are deep
- Colour-matched mastic sealant
- Neat tooled finish, no smearing

Shower resealing that stays clean
Black mould in shower silicone is one of the most common calls we get from High Wycombe. The fix is to remove every trace of the old sealant, kill the mould, let the joint dry properly and reseal with a quality sanitary silicone.
We do the same for kitchens, wet rooms and en-suites, and for builders and bathroom fitters who want the final sealant done by a specialist applicator. Our guide on why shower silicone goes black explains more.
We are also a polysulphide and polyurethane sealant applicator for commercial joints, handle new-build plot mastic and snagging, and use non-staining sealant on listed buildings. Draughty uPVC doors? A fresh line of window and door mastic usually solves it. As sealant specialists we cover all of High Wycombe and the wider Buckinghamshire area.

Insured & pre-qualified
Peace of mind for homeowners, builders and main contractors.
- £10m Employer’s LiabilityInsurance cover
- £5m Public Liability & Professional IndemnityInsurance cover
- Constructionline Silver member

- CSCS Skilled WorkerSealant Applicator (NVQ Level 2)
Over 20 years in construction
Products we use
Professional-grade sealants and adhesives from leading manufacturers.
Brand names and logos are trademarks of their respective owners and are shown to identify products we use. No endorsement is implied.
Our services in High Wycombe
Popular sealant services for homes and businesses in High Wycombe: Slab and floor joints, New build plot sealing, Sealant cost guide. See all our mastic and sealant services.
Villages we cover near High Wycombe
Hazlemere, Tylers Green and Penn to the north-east, Downley, West Wycombe and Lane End to the west, and Flackwell Heath, Wooburn Green and Loudwater towards the M40. If you are searching for a mastic man near me anywhere around High Wycombe, we can help.
Nearby town pages: Bedford (our base) · Aylesbury · Chesham · Hemel Hempstead · Region page: the South East
- Hazlemere
- Tylers Green
- Penn
- Downley
- West Wycombe
- Lane End
- Flackwell Heath
- Wooburn Green
- Loudwater
- Naphill
- Walters Ash
- Hughenden Valley
- Great Kingshill
- Stokenchurch
High Wycombe sealant questions
How much does a mastic man cost in High Wycombe?
It depends on how many metres of joint there are, the access and the sealant needed. Send a few photos on WhatsApp and we will give you a clear fixed price for the mastic or silicone work, with no surprises on the day.
Can you reseal a shower or bath in High Wycombe this week?
Usually, yes. Bathroom and shower resealing is a short job, and we plan High Wycombe visits so the old silicone is removed, the joint dries and the new sealant has time to cure.
Do you do commercial mastic work on High Wycombe industrial estates?
Yes. We price movement joints, shopfront and cladding perimeters, curtain wall and concrete joint sealing for owners, builders and main contractors, with RAMS on request.
Which sealant do you use on windows and doors?
Mostly low-modulus silicone or polyurethane sealant, chosen for the frame and the masonry. On older or sensitive surfaces we use non-staining products.
Need a mastic man in High Wycombe?
WhatsApp a photo of the joint to 07757 772 880 or call 01234 607 252 for a quick quote on window mastic, bathroom resealing or commercial sealant in High Wycombe. Contractors can email drawings or a joint schedule to office@pioneersealants.co.uk. We have over 20 years in construction behind us.
- Opening hours
- Monday – Friday8:00am – 6:30pm
- Saturday9:00am – 4:00pm
- SundayClosed










