Commercial sealant contractors in Coombe, Greater London
Commercial sealant contractors in Coombe, backed by over 20 years in commercial sealing. Fully insured and CHAS accredited.
- Sanitary sealant that has gone black and patchy
- A top-up bead over failed sealant, now lifting
- Smeared sealant across finishes from a rushed job
Commercial sealant contractors across Coombe
Send drawings, photos or a joint schedule, or tell us about the site, and we’ll come back with a fixed quote.
FAQs: Coombe
Do you work in London buildings with loading restrictions?
Yes, most London buildings have access rules of some kind, and we plan around them. Send the building rules and access times with your enquiry.
Do you cover business parks and estates near Coombe, such as Shannon Commercial Centre?
Yes. Our area takes in Coombe and its surroundings, with estates and business parks such as Shannon Commercial Centre included. Send details of the unit and the work through our quote form for a quick quote.
How long do sealant joints last?
It depends on movement, UV and weather, cleaning, traffic and the product. Treat them as maintenance items and inspect them regularly.
Are you CHAS accredited?
Yes. CHAS accredited, Constructionline member, and our applicators hold CSCS cards.
Do you seal on top of existing sealant?
No. We cut the old material out and clean the joint back before sealing, since fresh sealant will not bond reliably to aged material.
How is commercial sealant work priced?
Start with whatever information is to hand. Questions or a site visit follow where needed, and then a fixed quote for the agreed scope.
Is the old sealant taken out first?
Every failed bead is cut out completely. New sealant can’t grip the old bead, so laying over it never lasts; the faces are then cleaned and prepared.
Sealant applicators in Coombe
A reseal stands or falls on the preparation underneath it. Old silicone gives new sealant nothing to grip, so every trace of it is removed. Where the sealant maker specifies a primer for that substrate, it goes on before the new bead and the joint depth is controlled with backing rod. We work on washrooms and tea points, external facade joints and window and door perimeters, and what we’re called in for most is greasy, split joints in a kitchen or tea point and frame sealant that has cracked, shrunk or pulled away. Searching for sealant specialists in Coombe? We’ve been sealing commercial buildings since 2005, with CSCS-carded applicators.
In Coombe, as anywhere, the first joints to go are usually the ones that work hardest: frame perimeters in the sun, floor joints at doorways and anything that gets wet every day.
In London, most commercial sealant work happens in buildings that stay open: offices with staff at their desks, shops trading below flats and receptions that can’t be roped off for long. Work is split into zones agreed with the building or facilities manager, so the premises keep working around us.
We sign every job off with a 12-month guarantee. The promise is simple: if the work we did fails within twelve months, we return to fix it.
- Location
- Coombe (KT2, KT3, SW20)
- Region
- Greater London
- Guarantee
- 12 months on every job
- Quotes
- Fixed quote, scope in writing
- Phone
- 01277 525 020
- Last updated
- 3 November 2026
Leave it or put it right?
Patching the worst lengths can be the right call on a tight budget. Where the remaining sealant is just as old, it tends to fail soon after. Where it helps, we quote a patch and a full reseal side by side. In a London building, a failed joint rarely affects only one party: water travels through shared structures, and a small leak becomes a dispute between occupiers. Dealing with it early is simpler for everyone.
We don’t publish prices, since every building and every scope is different. Call for a quote and we’ll price your job on its own details.
Why choose Mastic Doctor in Coombe
- Constructionline member for supplier checks
- Colours confirmed for the specified product
- Matching to RAL references, product permitting
- Joints cleaned back to sound surfaces
Take a look at our cost guide or how we’re accredited.
Owners, agents and contractors
Blocks and communal areas make up much of the work for housing associations and agents. We phase the work so people keep access, and each stage is agreed with your contact.
Main contractors use us as their sealant subcontractor, on new build and refurbishment alike. Programme, specification and site rules come first.
Common problems we fix in Coombe
Resealing over the top is a false economy we come across often. New silicone has nothing to key into, so the top layer lifts, holds water and hides what’s going on. By the time it shows, there can be two or three layers to cut out.
These are often picked up first by site or facilities staff:
- Layers of sealant, all of them failing
- Weathered facade sealant that no longer flexes
- Damp patches where an external joint has failed
- Movement joints packed with grit and debris
On a business park such as Shannon Commercial Centre, 1.5 miles south-east of Coombe, sealant work tends to follow fit-outs: receptions, tea points, washrooms and frame perimeters.
What to look for in a quote
- What level of public liability insurance do they hold?
- Is depth set with backing rod, or bond-breaker tape in shallow joints?
- Whether their applicators hold CSCS cards
- Whether old or failed sealant will be cut out, not overlaid
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.
Some joints are best left to specialists: for example fire-rated seals that must match a tested detail, trafficked floor joints and external movement joints. Getting these wrong typically costs more in the end than doing them right.
Sealant on show in Coombe’s commercial buildings
Seven care or nursing homes sit less than 2 miles from Coombe. In care settings, a neat joint at a kitchen worktop or a lounge window is part of keeping the place easy to clean, often in colours that suit the décor. The area within 2 miles of Coombe holds plenty of hotels. Refits in hotels bring joints at vanity tops, bar counters and reception desks where the colour has to suit the scheme, with rooms done in turn while the rest stay let.
Shops and cafés around stations like Norbiton station (to the south-west of Coombe) trade from early, so work is timed around them. Units at places like Bentall Centre, 1.8 miles west of Coombe, are refitted as brands change, and the joints have to suit each new scheme.
Coombe is about 1 mile north of New Malden, in Greater London. Our applicators travel to Coombe for work on sealant joints. Across Greater London, 764 places are covered, Coombe among them. Sites around London have their own page, about 9 miles away.
We take on sealant joints across the KT2, KT3 and SW20 postcode area, for business premises of every kind. Streets here include West Road, Crown Road and Traps Lane, and sites on any of them can send details for a fixed quote. Close to Coombe, our area also takes in Motspur Park (1 mile south-east), Coombe Hill (1 mile north), Kingston Vale (1 mile north-east), Norbiton (1 mile south-west) and New Malden (1 mile south). Bigger towns within reach include London (9 miles north-east), City of Westminster (8 miles north-east), Marylebone (8 miles north-east), Kensington (6 miles north-east), St Pancras (10 miles north-east) and Shoreditch (11 miles north-east).
Local landmarks in Coombe
We work on buildings around Canbury School, Coombe Girls' School and The Royal Oak Public House and the streets around them. For rail, the closest station is Norbiton station, about 1 mile south-west. Well-known places in the area include Bentall Centre (1.8 miles west) and White Lodge Museum (1.8 miles north). Open spaces near Coombe include Kew Gardens Lake and Kingston Hill Road area.
How a job runs
Inspect, seal, sign off: every visit follows that pattern. First comes an inspection and agreement on scope, then the work is carried out to the specified product and detail, and the job ends with a walk round and sign-off. Planning a London job such as one in Coombe starts with access. Send the building rules and access times with your enquiry.
- First, details reach us through the quote form or a site visit.
- The cause is diagnosed and the scope priced as a fixed quote.
- Where parts of the building must stay open, the work is phased.
- Old sealant is cut out completely, never sealed over.
- Each joint gets a suitable sealant, laid to depth and tooled.
- A final walk-round, then the 12-month guarantee applies.
Preparing the site
- Point out any areas we must not close
- Make sure the joints can be reached
- Explain the parking and delivery arrangements
Request a quote
We quote a fixed sum against the scope you give us, so you know the figure before anyone is on site. To ask for one, give us a call on 01277 525 020 or use the quote form.
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What else we do in Coombe
What we can’t put right
We seal joints; we don’t mend everything behind them. Sealant alone won’t deal with:
- Water from a services leak rather than a joint
- Cracking that needs a structural engineer to look at it
- Misted, cracked or failed glazing units (a glazier’s job)
If you’re not sure, just call 01277 525 020 or send photos by email and we’ll give you a straight answer.
What we seal
- Floor and threshold joints
- Kitchen worktops and splashbacks
- Movement joints in walls and floors
- External facade joints
- Window and door perimeters
- Washrooms and tea points