Mastic Sealing in Hillingdon
We carry out mastic sealing for building owners, managing agents and housing associations in Hillingdon and the surrounding area. Send details for a fixed quote.
- Window mastic that has split and shrunk
- Leaks at window and door perimeters
- A mix of products and colours from past repairs
Mastic sealing for businesses in Hillingdon
Tell us what needs sealing and where, with photos or drawings if you have them, and we’ll price it.
Mastic sealing in Hillingdon
We work for building owners, landlords with commercial or block portfolios, managing agents and housing associations. A planned, building-by-building programme often works better than reacting to each complaint and we quote and schedule each building in turn. Site teams most often ask us about repeated reactive repairs to the same buildings and communal area joints that look neglected, on shopfronts below residential blocks, window and door perimeters on blocks and external wall and movement joints. Facilities teams, main contractors and managing agents in Hillingdon tend to want the same three things: a clear scope, tidy work and joints that don’t fail again.
For managing agents in Hillingdon, resident access, notice periods and the building’s rules shape the job. We work to the agent’s notice and access plan, so residents know what’s happening.
The 12-month guarantee covers our workmanship: preparation, application and finish. Damage, later alterations by others and movement beyond what the joint was designed for sit outside it.
- Location
- Hillingdon (UB10, UB8, UB9, HA4)
- Region
- Greater London
- Guarantee
- A 12-month guarantee
- Quote
- A fixed quote before we start
- Call
- 01277 525 020
- Updated
- 3 November 2026
Honest limits
We seal joints; we don’t mend everything behind them. On its own, sealant can’t deal with:
- Broken glass or failed sealed units
- Asbestos-containing sealant, which we don’t remove
- Masonry that has broken away beside the joint
If in doubt, call 01277 525 020 or email the details over and we will say what we think.
Where we work in Hillingdon
- Balcony and threshold joints
- Window and door perimeters on blocks
- Communal kitchens and washrooms
- External wall and movement joints
- Communal entrances and stairwells
- Shopfronts below residential blocks
Hillingdon: questions and answers
Can you work in a London building with booked loading and goods-lift slots?
Yes. Booked loading bays, goods lifts and permit-to-work systems are normal for London jobs. Share the building’s contractor rules and we’ll work to them.
Do you cover business parks and estates near Hillingdon, such as Park View Industrial Estate?
Yes, sites like Park View Industrial Estate are within our area, along with the rest of Hillingdon. Photos and a short description are enough for a first look.
Can you send RAMS and CSCS details before starting?
Tell us what site paperwork you need (RAMS, insurance certificate, CSCS details) and we will confirm with the quote. We are CHAS accredited and a Constructionline member.
Do you work with property factors and landlords?
We do. Most of our mastic sealing is for agents, factors, housing associations and portfolio landlords and work can be quoted per building or as a whole.
What do you charge?
There isn’t a price list, because every site is different. With photos or drawings, we can give you a fixed quote.
Will you come and look before quoting?
Photos, drawings or a schedule are often enough to quote. If the job needs a look first, we’ll arrange a visit before quoting.
Will you just go over the old sealant?
No, never. Sealing over old material is one of the classic causes of early joint failure, so everything comes out first.
Do you need mastic sealing in Hillingdon?
Occasionally the substrate fails, not the sealant for example where render or brick edges crumble. If the edges are unsound, we say so before quoting the sealing.
Common reasons buildings call us in:
- Water getting in round frames after rain
- Patchy repairs in mismatched sealant
- Communal area joints that look neglected
- Failed external movement joints
If you own or manage units on a site such as Park View Industrial Estate, 1.5 miles to the south of Hillingdon, failed mastic on frames, door surrounds and external joints can be dealt with unit by unit.
Questions to ask before you book
- What the guarantee covers, and for how long
- Whether primer will be used where the manufacturer specifies it
- Will CSCS-carded applicators be on site?
- Is depth set with backing rod, or bond-breaker tape in shallow joints?
After the work
To get the most from the new sealant:
- Encourage occupiers to report problems at frames
- Keep a record of when each building was resealed
- Share your contractor requirements early
- Share the asbestos register when you send details
If paintable sealant was used, decoration can follow once it has cured. Non-paintable silicone shouldn’t be painted over.
Mastic fails gradually, then all at once in a wet spell. Acting at the first signs keeps it a straightforward reseal and saves internal repairs.
Surface by surface
External movement joints
Failed sealant is removed, backing rod inserted to control depth and the joint resealed with a grade whose movement class fits.
Tenement and older buildings
Older buildings, including Scotland’s sandstone tenements, have their own joint details. We look at the substrate before choosing a sealant.
Block-wide mastic in Hillingdon
London blocks come with residents to inform, access to agree and often a concierge or estate office to work with. We work to your notice and access plan.
Trustees of buildings like Church of St John can bring frame and external mastic into a planned maintenance list. Blocks of flats and mixed-use buildings often cluster around stations such as West Drayton station (to the south-west of Hillingdon) and their window and balcony mastic tends to age at the same rate across a building.
Hillingdon is about 2 miles north-west of Hayes, in Greater London. We cover commercial sites throughout Hillingdon. 764 places across Greater London fall within our area, Hillingdon among them. For work in that direction, see our London page, about 15 miles away.
We cover the UB10, UB8, UB9 and HA4 postcode districts. If your site is on The Larches, Brampton Road and Clifton Gardens or close by, send details and we’ll quote for mastic joints. Main routes into Hillingdon include the B465 and B467, which helps when planning parking and deliveries for the job. Nearby places we also cover include Uxbridge (1 mile west), Ickenham (1 mile north), Cowley (2 miles south-west), Yiewsley (2 miles south-west) and Hayes (2 miles south-east). Bigger towns within reach include London (15 miles east), City of Westminster (13 miles east), Marylebone (13 miles east), Kensington (11 miles east), St Pancras (14 miles east) and Hampstead (12 miles east).
Local landmarks in Hillingdon
Locally, jobs take us to sites close to Highfield Primary School, Norman Leddy Memorial Gardens and Oak Wood School, among other places. Hillingdon’s nearest station is West Drayton station, roughly 2.2 miles south-west. Other landmarks nearby include Hillingdon Museum and Archives Services (1.4 miles north-west) and Hillingdon Hospital (1 mile south-west). Not far away are Northala Fields and Gutteridge Wood and Meadows.
Diagnose, treat, sign off
At the end of each section, the masking comes off, the area is cleaned and every joint is checked. Where the sealant needs time to cure before use, we tell you and sign the area. The ULEZ covers the whole of Greater London, and parking near a job is rarely simple. Let us know about any on-site parking or loading arrangements when you send the job details.
- A building-by-building inspection lists the failed joints.
- The quote is fixed and split as suits you.
- We agree the programme and dates with you.
- Old mastic is removed and the joint faces prepared.
- New sealant goes in with backing rod and primer where needed.
- We check the finished work and confirm the guarantee.
What we need from you
- Let building users know which areas are affected
- Flag any permit to work we will need
- Explain the parking and delivery arrangements
Ask for a quote
Need a figure for a tender or a budget? Send the scope and any drawings, and we will return a fixed quote that you can work with. If you have questions first, call 01277 525 020 or send photos by email.
Related advice
Also in Hillingdon
Why act early in Hillingdon
Failed perimeter mastic lets cold air in around frames and the windows normally get the blame. In many cases, new perimeter sealant deals with it where the frames themselves are sound. Failed sealant in a building in Hillingdon can quickly affect neighbours, tenants or the floor below: water travels through shared structures, and a small leak becomes a dispute between occupiers. Putting it right early is less disruptive than dealing with the consequences.
Access often affects the price as much as the sealing: easy-to-reach joints are quicker than those that need equipment to get to. Tell us how the joints are reached and call for a quote.
What you get with us
- Colours chosen to suit frames, cladding or finishes where possible
- Health and safety: CHAS accredited
- Fully insured
- 12-month guarantee on workmanship
Take a look at how commercial sealant jobs are priced or our accreditations and insurance.