Mastic Man Westminster: Marylebone, Pimlico & Maida Vale
Marble bathrooms in Mayfair and Marylebone, stucco terraces in Pimlico and Belgravia, mansion flats in Maida Vale and St John’s Wood: we are the mastic man and sealant contractor Westminster homeowners, agents and contractors call.
- From Bedford
- About 55 miles, via the M1
- Postcodes
- W1, W2, W9, SW1 and more
- Typical work
- Mansion flats, stucco terraces & offices
- We work for
- Homeowners, agents & fit-out firms
Homes and mansion blocks behind the West End
Most people think of Westminster as offices, shops and Parliament, but tens of thousands of people live in its mansion blocks, mews houses and stucco terraces.
In Marylebone, Mayfair, Belgravia and Knightsbridge, high-end bathrooms are finished in marble, limestone and bespoke glass, where the silicone has to be a fine, perfectly straight, non-staining line. We reseal them for homeowners, property managers and interior contractors, matching the colour to the stone.
In Pimlico, Maida Vale, Bayswater, Paddington and St John’s Wood, the work is more varied: mansion-flat bathrooms and kitchens, sash windows in painted stucco, and doors and balconies that need fresh mastic.
The long white terraces of Pimlico, laid out by Thomas Cubitt, and the red-brick mansion blocks of Maida Vale are typical of the buildings we seal here, each needing a sealant colour that disappears into the façade.

Mastic and silicone sealant services in Westminster
Marble & stone bathrooms
Non-staining silicone on marble, limestone and natural stone, finished to a fine, straight line.
Bathroom resealing →Sash window mastic Westminster
Discreet, colour-matched perimeter sealant on painted sashes and stucco reveals.
Window & door mastic →Doors, balconies & terraces
Balcony doors, terrace thresholds and mews doors sealed against rain and draughts.
Doors & thresholds →Property managers & agents
Reseals in managed flats between tenancies, booked around building rules.
Commercial & fit-out
Office washrooms, glazing and façade joints for contractors across the West End.
Commercial mastic →More Westminster services: expansion and movement joints · kitchen sealant · bathroom and shower resealing · façade and curtain wall sealing · concrete joint sealing · window and door mastic
On site now at Salisbury Square, City of London
Our current project is in the City: stone-to-frame perimeter sealing on the new law courts at Salisbury Square, with Arbosil XL 1099 S non-staining silicone.
Fine sealant lines on expensive finishes
On a marble bathroom, the wrong silicone can leave a dark halo in the stone within weeks. We use a non-staining silicone made for natural stone, mask every joint and finish to a consistent, fine profile.
It is the same thinking we apply on the stone façade at Salisbury Square, just indoors.
- Non-staining silicone for stone
- Every joint masked
- Colour matched to the stone
- Fine, straight finish

Working in mansion blocks and managed buildings
Mansion blocks have porters, lift bookings, parking rules and set working hours. Tell us the building rules when you book and we will plan the visit around them, with dust sheets down and the bathroom left clean.
We reseal baths, showers, basins and kitchens, and the window and door mastic outside where the building allows.
As a sealant specialist and specialist applicator, we also offer bathroom resealing in Westminster for wet room and en-suite joints, shower resealing in Westminster, low-modulus mastic sealant on listed stucco and uPVC replacement frames, re-mastic work for managing agents, and expansion joints and cladding sealed with polyurethane or polysulphide and backer rod. For new-build plot mastic and snagging we provide RAMS. For City and West End commercial work, see our Westminster and City of London page.

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.
Westminster neighbourhoods we cover
Marylebone, Mayfair, Soho and Fitzrovia, St James’s, Belgravia, Pimlico and Victoria, Paddington, Bayswater and Little Venice, and Maida Vale, St John’s Wood and Queen’s Park in the north. If you are looking for a mastic man near me in Westminster, call or WhatsApp us.
Postcode districts we cover: W1, W2, W9, SW1, NW1, NW8, WC2, W10.
London pages: Mastic Man London · Area page: Westminster & the City · Nearby boroughs: Islington · Brent · Project: Salisbury Square · Contact us
- Marylebone
- Mayfair
- Soho
- Fitzrovia
- Covent Garden
- St James’s
- Belgravia
- Pimlico
- Victoria
- Westminster
- Paddington
- Bayswater
- Little Venice
- Maida Vale
- St John’s Wood
- Queen’s Park
Westminster sealant questions
Can you reseal a marble bathroom without staining the stone?
Yes. We use a non-staining silicone made for natural stone, mask the joints and finish to a fine line in a colour that matches the marble.
How much does a mastic man cost in Westminster?
High-end finishes and building rules both affect the price. Send photos and the building’s requirements and we will confirm a fixed figure.
Can you work around mansion block rules?
Yes. Tell us about lift bookings, porters, parking and working hours and we will plan around them.
Which Westminster postcodes do you cover?
All of them, including W1, W2, W9, SW1, NW8, WC2 and the Westminster parts of NW1 and W10.
Need a mastic man in Westminster?
Marylebone, Pimlico or Maida Vale? Call 01234 607 252 or WhatsApp 07757 772 880 for a Westminster quote. 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










