Greater London · England
Commercial sealant contractors in NW9
We cover every part of the NW9 postcode district, which takes in Colindale, Grahame Park and The Hyde. Every joint is properly prepared, with a 12-month guarantee.
Mastic and sealant across NW9
Tell us what needs sealing and where, with photos or drawings if you have them, and we’ll price it.
Towns and villages in NW9
- Colindale
- Grahame Park
- The Hyde
- West Hendon
- Kingsbury
- Burnt Oak
- Neasden
- Wembley
- Hendon
- The Burroughs
- Wembley Park
- Queensbury
- Dollis Hill
- Staples Corner
What we do in NW9
- Coloured and colour-matched sealant
- Commercial washroom and wet-area sealing
- Construction and new-build mastic
- Industrial and floor joint sealing
- Fire-rated sealing and fire stopping
- Facade and window perimeter sealing
- Mastic sealing for building owners and managing agents
- Commercial sealant contractors
- Expansion and movement joint sealing
- Every service
Tell us what needs doing and your postcode and we’ll come back with a price: give us a call on 01277 525 020 or email a schedule or drawings.
Our commercial sealant contractors service in NW9
Inside a commercial building, sealant does a lot of quiet work: around sanitaryware, along worktops and splashbacks, at window boards, partition heads and floor junctions. Externally it keeps rain out of frame perimeters, panel joints and movement joints. We deal with internal and external sealant joints alike. Site teams most often ask us about hardened, chalky sealant on south-facing or exposed elevations and shrunken sealant along kitchen worktops and splashbacks, on window and door perimeters, movement joints in walls and floors and kitchen worktops and splashbacks.
Before any cutting starts, the area is protected: tape along each joint edge and covers over finishes, stock and equipment close by. On site, the work typically takes as long as the agreed scope needs, from a single visit to a programme spread over several weeks, and our waste is bagged and taken away as we go.
- We start with the evidence: photos, drawings or a look on site.
- A fixed quote follows, with removal and preparation included.
- Sequence, access and working times are settled before the first joint is touched.
- Each joint is stripped, cleaned back to sound faces and primed where the maker specifies.
- Backing goes in, the new sealant is laid and tooled, and the area is left neat.
- Completed areas are signed off with you under our 12-month guarantee.
Pricing in NW9
No two sites price the same: the joint sizes, the specified product, access and working hours each have a bearing. A fixed quote follows once we understand the job.
Why choose Mastic Doctor
- Sealing commercial buildings since 2005
- CSCS-carded applicators
- Colour agreed before work starts
- Specification-led, product-correct work
Request a quote
Tell us about the building, the joints and when you need the work done, and we will put a fixed quote together. The easiest way is to call the office on 01277 525 020 or use the quote form.
Around Colindale
In Colindale, that means premises near St Matthias the Apostle church, Moon Under Water pub and Colindale Primary School, among other places. Also close by are Kisharon College (1.2 miles east), Sunny Hill Park (0.8 miles east) and Saracens High School (0.5 miles north). Colindale’s nearest station is Hendon station, about 1 mile south-east. Well-known places in the area include Edgware Community Hospital (1.3 miles north-west) and Brent Cross Shopping Centre (1.5 miles south-east). Not far away are Darland's Lake and Parliament Hill.
Commercial sealant contractors across NW9: the area picture
In NW9, much commercial sealant work follows refits in shops, offices and hotels in places such as Burnt Oak, Neasden and Wembley. Where the joint is on show, a colour that suits the finish is part of the job.
Around the motorway corridors of the South East, business parks and industrial estates are common, and we cover NW9 along with the rest of the region.
Colindale: Sites a few miles apart, such as Colindale Retail Park and Silk Bridge Retail Park, can share one programme and one point of contact. Refits at hotels like Hendon Hall Hotel, 1.3 miles east of Colindale, bring joints at vanity tops, bars and reception desks that guests see every day.
Work for main contractors and building owners
Housing associations and managing agents often need work done across blocks and communal areas. Work can be phased so residents and staff keep access throughout, and each stage is agreed with your contact.
If you look after buildings for someone else, you need clear quotes and clear reporting. You get a fixed quote, an agreed scope and a walk round at the end.
How the job changes by surface
Window and door perimeters
The perimeter joint between a frame and the structure keeps rain out of the reveal. We remove the old seal, prepare the faces, fit backing where needed and seal again with a product chosen for both the frame and the wall.
Movement joints in walls and floors
Floor joints that take trolleys or forklifts need a tougher filler or sealant. The choice comes down to how much the joint moves and what runs over it; if the arrises are broken, we’ll say so before sealing.
What sealant work can’t fix
Honesty saves time and money. New sealant won’t cure:
- Faulty windows rather than failed perimeter sealant
- Structural cracks or movement the joints weren’t designed for
- Roof leaks that only look like a joint problem
Why deal with it now?
Reactive resealing, a leak at a time, tends to cost more overall than a plan. A planned programme groups work by building or area, cuts repeat visits and gives you a budget figure. We can help you prioritise, starting with the joints most likely to let water in.
Questions to ask before you book
- Can the work be phased to keep areas open?
- How long is the guarantee, and what does it include?
- What site paperwork they can supply
- The named product and why it was chosen
Common problems we fix in NW9
External sealant takes a steady beating from the weather. Sunny elevations dry the surface out and exposed ones take driving rain, so beads chalk, stiffen and lose their stretch. Once it stiffens, the joint opens up at the next big temperature swing.
These are often picked up first by site or facilities staff:
- Frame mastic that has hardened and come away from the wall
- Wall and floor joints that have lost their seal
- Shrunken sealant along kitchen worktops and splashbacks
- External beads that have gone brittle and cracked
Common questions from NW9 clients
How long does a job like this take?
That varies with the scale of the job, but the work normally takes a few hours to several days on most single sites, depending on joint lengths and access. Larger or phased jobs take longer, and we’ll give you a timescale with the quote.
When is resealing likely to be due?
There’s no fixed lifespan: movement, exposure, cleaning, traffic and the product all play a part. Treat them as maintenance items and inspect them regularly.
Could the old sealant in an older building contain asbestos?
Some older mastics did contain asbestos. That’s why we ask for the asbestos information first, and stop if a material is suspect until it’s tested.
Can weather delay the job?
Outside, yes. Sealant needs a dry joint and a temperature within the product’s range, so frost, rain or cold mornings can delay outside work. Internal work is rarely affected.
Do your applicators hold CSCS cards?
Yes. Our applicators hold CSCS cards, which many sites require.
Are you CHAS accredited and on Constructionline?
Yes. We’re CHAS accredited, we are a Constructionline member and we use CSCS-carded applicators.
How do we get a quote?
Send what you have, even a few photographs and rough lengths. We follow up with questions or a visit where needed.