Commercial washroom and wet-area sealing in Downe, Greater London
Need washroom sealing in Downe? It’s simple: send details, get a quote, we seal, guaranteed.
- Failed sealant in a tea point or staff kitchen
- Open joints at the base of cubicle panels
- Failed sealant behind washroom basins
Washroom sealing for businesses in Downe
Photos, a specification or a quick description of the joints is enough to start a fixed quote.
Washroom sealing for commercial buildings in Downe
Since 2005 we have resealed commercial washrooms for facilities teams, contractors and building owners. Our applicators are CSCS-carded, and we are CHAS accredited and a Constructionline member. We are fully insured. Our workmanship is guaranteed for 12 months. We work on accessible toilets and changing rooms, kitchens and tea points and showers, trays and wet room floors, and the usual reasons a site gets in touch are sealant lifting along a tray edge and sealant stained black around basins and showers. For commercial sealant work in Downe, you deal with one contact from quote to sign-off, for single jobs and planned programmes alike.
Washrooms in London offices, hotels and gyms are used hard from morning to evening. Mouldy or split sealant at vanity tops, IPS panels and urinals is replaced with anti-mould sanitary silicone, in phases so some facilities stay open.
Work we carry out comes with a 12-month guarantee. Should something we installed fail, ring 01277 525 020 or email a schedule or drawings and we will come back to it.
- Place
- Downe (BR6)
- Wider area
- Greater London
- Guarantee
- 12 months on our workmanship
- Quote
- Fixed quote, scope in writing
- Call
- 01277 525 020
- Last updated
- 3 November 2026
Keeping Downe washrooms open while we work
London offices and hotels normally can’t close all their washrooms at once, so we phase the work core by core or floor by floor with the building manager. The 2 miles around Downe include two care or nursing homes. Assisted bathrooms and wet rooms in care settings need sanitary sealant that stays cleanable. We plan the work with the manager so residents are disturbed as little as possible.
Schools such as Downe Primary School have toilets, changing rooms and kitchens that are best resealed in the holidays. Downe is inside London’s ULEZ, as is the rest of Greater London; tell us about loading bays, goods lifts and parking when you send details.
Downe is about 4 miles south-west of Orpington, in Greater London. Anywhere in BR6, it works the same way: details in, fixed quote out, then sealing and a 12-month guarantee. Downe is one of 764 places we cover in Greater London. Sites around London have their own page, roughly 13 miles from Downe.
Anyone looking for washroom sealing in BR6 gets the same process as the rest of our area: send details, get a quote, we seal, guaranteed. We cover commercial and managed buildings on High Street, North End Lane and Belle Vue Road and the roads nearby. We also cover Farthing Street (1 mile north-west), Hazelwood (1 mile east), Luxted (1 mile south), Leaves Green (1 mile west) and Single Street (2 miles south). Nearby towns on our patch include London (13 miles north-west), City of Westminster (15 miles north-west), Marylebone (15 miles north-west), St Pancras (15 miles north-west), Shoreditch (14 miles north-west) and Hoxton (15 miles north-west).
Around Downe
Around Downe, our work takes us to commercial buildings near The Queens Head pub, Charles Darwin School and South Park. The closest station to Downe is Chelsfield station, about 2.6 miles north-east of the centre. Nearby you will also find Crofton Roman Villa (2.7 miles north-east) and Princess Royal University Hospital (1.8 miles north). The countryside around Downe includes Downe Bank Nature Reserve and Betsom's Hill.
From enquiry to sign-off
The first thing on site is a walk round with your contact, to confirm the scope, the order of work and any areas we must keep clear. Then we strip out anything that has failed, prepare every joint and seal it. All of Greater London is in the ULEZ, and kerbside space in Downe can be scarce. Let us know about any on-site parking or loading arrangements when you send the job details.
- Every room is surveyed and the failed joints listed.
- The fixed quote sets out the rooms, the products and the phasing.
- The whole of the old bead is removed.
- Joints are degreased and dried.
- A sanitary silicone bead is laid and given a smooth tooled finish.
- Each area is handed back when ready.
Preparing the site
- Send any specification or drawings in advance
- For older buildings, check the asbestos register before work
- Tell us what induction or permit system the site runs
Ask for a quote
A good quote starts with a clear picture: the joints involved, quantities, access and the product called for. Send what you have, and we will arrange a site visit if anything is unclear.
Read more
What happens if it’s left?
Sealing on top of old silicone saves nothing. Silicone won’t grip silicone, so it lifts and holds moisture underneath. Cutting out completely and cleaning back takes a little longer and lasts. Access in London is hard enough to arrange once, so it makes sense to deal with every failing joint while access is in place.
Access often affects the price as much as the sealing: joints within easy reach take less time than ones that need access equipment. Tell us how the joints are reached and call for a quote.
Why choose Mastic Doctor in Downe
- Old sealant cut out, never sealed over
- 12-month guarantee on workmanship
- Colours confirmed for the specified product
- Sealing commercial buildings since 2005
Read how commercial sealant jobs are priced and how we’re accredited.
Different surfaces, different methods
Wet-room floors and floor-to-wall joints
Wet floors are common in accessible showers and changing rooms so the edges are checked carefully.
Showers and trays
A tray flexes every time it’s used and is constantly wet. Tray joints are where many washroom leaks start.
Keeping the joints sound
For the best life from the joints:
- Keep a record of which washrooms need attention
- Keep washrooms out of use until we say the sealant has cured
- Inspect washroom sealant regularly
- Don’t leave an open joint at a basin or tray
Add washroom sealant to routine inspections. Look for black spotting, cracks, peeling edges and gaps at the busiest fittings and photograph anything new.
A split joint at a shower tray can leak for a long time before anyone sees it. By then, other trades may be needed as well so failed joints are worth acting on quickly.
More services for Downe
Questions about Downe
Do you work in London buildings with loading restrictions?
Yes. Inductions, permits and timed loading are routine for us in London. Say when the building is occupied and when it’s quiet, and we will plan accordingly. We allow for the ULEZ, which covers every borough
Is a hospital such as Princess Royal University Hospital somewhere you can work?
Yes, provided the work is planned with the site’s estates team. Before anything starts, the estates team agrees permits, inductions and infection-control measures with us.
What do you charge?
Every job gets its own fixed quote. To get one, ring 01277 525 020 or email drawings and photos.
Will all the toilets be closed at once?
The work is phased so users always have somewhere to go. One washroom, one bank of cubicles or one changing room is done at a time around your site hours and access windows.
What sealant do you use in washrooms?
Sanitary silicone with anti-mould additives in the majority of cases. We use neutral-cure versions on stone, some metals and near mirrors.
Can you work to our specification?
Yes. Send it with your enquiry, and we will price the work to it.
Is it possible to just clean mouldy silicone?
Cleaning may lighten it, but the mould returns. New anti-mould sanitary silicone is the treatment and check the ventilation isn’t the cause.
When to call us in Downe
Decorators’ caulk and general sealants sometimes end up where sanitary silicone belongs. They aren’t made for constant wetting and they discolour and fail early.
Any of the following is a good reason to get the joints checked over:
- Failed joints along IPS and cubicle panels
- Split or peeling sealant at shower trays
- Users noticing mouldy joints
- Gaps where vanity tops meet the wall
Church halls and community buildings, such as those at St Mary's Church, have kitchens and toilets used by many groups, and their sanitary sealant works hard.
What your quote should include
- Their public liability cover
- The terms of the workmanship guarantee
- Whether their applicators hold CSCS cards
- Will RAMS and insurance details be available?
When to bring in a specialist
General builders and handymen seal joints, but it isn’t their main trade. A specialist brings correct preparation, depth control with backing rod and a product suited to that particular joint, which is what makes a joint last.
The visible bead is only part of the job. Backing rod, primer where specified and a joint designed to move with the building are easy to get wrong without experience.