Mastic Man Croydon: Commercial & Domestic Sealant Contractor
From the new towers around East Croydon to semis in Shirley and Sanderstead, we are the mastic man and sealant contractor Croydon builders, managing agents and homeowners call for clean, long-lasting mastic and silicone sealant.
- From Bedford
- About 70 miles, via the M1 and M25
- Postcodes
- CR0, CR2, CR5, CR7 and more
- Typical work
- Towers, offices, flats & family homes
- We work for
- Contractors, landlords & homeowners
Sealant work in London’s southern office capital
Croydon has more tall buildings going up than almost anywhere outside central London, and every one of them is a long list of sealant joints.
Around East Croydon, Wellesley Road and the old Whitgift Centre site, residential towers and refurbished 1960s office blocks need window perimeter mastic, curtain wall and cladding joints and movement joints sealed from MEWPs or cradles. We price those packages for main contractors and façade subcontractors.
Further out, Addiscombe, Thornton Heath, Norbury and South Norwood are streets of Victorian and Edwardian terraces, while Purley, Coulsdon, Sanderstead and Selsdon have larger inter-war and post-war homes. That is where most of our domestic window and door mastic, bathroom resealing and kitchen sealant work in Croydon comes from.
The Fairfield Halls refurbishment and the Purley Way retail parks add a lot of commercial glazing and shopfront sealant.

Mastic and silicone sealant services in Croydon
Tower & façade sealant Croydon
Curtain wall, cladding and window perimeter joints on residential and office towers, sealed to the façade spec from MEWPs or cradles.
Façade & curtain wall →Window & door mastic
Cracked external mastic around uPVC, timber and aluminium frames cut out and replaced in a colour that suits the brick or render.
Window & door mastic →Bathroom resealing Croydon
Mouldy bath, shower and basin silicone fully stripped and replaced with anti-mould sanitary silicone.
Bathroom resealing →Expansion & movement joints
Podium, car park and brickwork movement joints resealed with low-modulus polyurethane sealant and backer rod.
Expansion joints →Kitchen sealant
Worktop, upstand and sink joints resealed neatly on laminate, oak, quartz and granite.
Kitchen sealant →Managing agents & landlords
Flats resealed between tenancies, and communal window mastic surveyed and priced block by block.
More Croydon services: façade and curtain wall sealing · bathroom and shower resealing · window and door mastic · concrete joint sealing · kitchen sealant · expansion and movement joints
On site now at Salisbury Square, City of London
Our current City job: perimeter sealing between natural stone and window frames at the new law courts, using Arbosil XL 1099 S. Towers in Croydon get the same care.
Re-mastic work on Croydon apartment blocks
A lot of the flats built around Croydon town centre in the 2000s are now at the age where the original silicone and polyurethane sealant has hardened, split or lost adhesion. Water tracks in at the window head or the cladding interface and shows up as damp inside a flat several floors down.
We survey the joints, write a simple joint schedule and re-mastic the elevation in sections, cutting the old sealant out completely.
- Joint survey and photo report
- Old sealant cut out, not overlaid
- Correct primer and backer rod
- RAMS and insurance documents provided

Bathrooms, kitchens and windows in Croydon homes
For Croydon homeowners the jobs are usually smaller but just as fussy: a shower tray that leaks into the kitchen ceiling, a bath with black mould along the back edge, or a front door where the mastic has fallen out of the reveal.
We remove the old sealant, treat the mould, let the joint dry and reseal with the right silicone for the job, so the new joint lasts rather than going black again in six months.
We also handle new-build plot mastic and snagging, and colour-match sealant to stone and brick. Draughts round a uPVC door? Fresh door mastic usually cures it.

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.
Croydon neighbourhoods we cover
From Croydon town centre and East Croydon out to Purley, Coulsdon and Kenley in the south, Shirley and Addiscombe to the east, and Thornton Heath, Norbury and South Norwood to the north. If you are looking for a mastic man near me anywhere in Croydon, call or WhatsApp us.
Postcode districts we cover: CR0, CR2, CR5, CR7, CR8, SE25, SE19, SW16.
London pages: Mastic Man London · Area page: south-east London · Nearby boroughs: Bromley · Project: Salisbury Square · Contact us
- Croydon town centre
- East Croydon
- South Croydon
- Addiscombe
- Shirley
- Thornton Heath
- Norbury
- South Norwood
- Selhurst
- Waddon
- Purley
- Coulsdon
- Kenley
- Sanderstead
- Selsdon
- New Addington
Croydon sealant questions
Do you take on sealant packages for Croydon tower projects?
Yes. We price window perimeter, cladding, curtain wall and movement joint sealant for main contractors and façade firms, provide RAMS and insurance documents, and work from MEWPs, towers or cradles as the site allows.
How much does a mastic man cost in Croydon?
Pricing depends on joint length, access and product. Homeowners can WhatsApp three or four photos; contractors can send a joint schedule or elevations and we will return a priced breakdown.
Can you reseal a shower in Croydon without retiling?
Usually, yes. If the tiles and tray are sound, we strip the old silicone, clean and dry the joint and reseal it. If the leak is coming from failed grout or the tray itself, we will tell you.
Which Croydon postcodes do you cover?
All of them, including CR0, CR2, CR5, CR7, CR8 and the SE25, SE19 and SW16 parts of the borough.
Need a mastic man in Croydon?
Croydon job coming up? Call 01234 607 252 or WhatsApp 07757 772 880 with photos or drawings and we will price it quickly. 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










