South Croydon mastic sealing
Commercial sealant work in South Croydon for contractors, FMs and building owners: mastic sealing for building owners, managing agents and housing associations, quoted at a fixed price.
- Complaints coming in block by block
- A mix of products and colours from past repairs
- Cracked, hardened mastic round windows on a block
Mastic sealing near South Croydon
Tell us what needs sealing and where, with photos or drawings if you have them, and we’ll price it.
How we handle mastic sealing in South Croydon
Different joints need different sealants. Low-modulus neutral-cure silicone suits many window perimeters and external movement joints, while hybrid polymer sealants grip many materials and are often paintable, and colours are confirmed for whichever product is used. If you have draughts at frames across a block and open joints in brickwork or panels, we can help. Sealant applicators who only do sealant are a different proposition from a general trade with a gun in the van: on jobs in South Croydon, preparation and product choice get the time they need.
London has a large stock of purpose-built blocks, mansion flats and converted buildings managed by agents and housing associations. Window and door perimeters, balcony joints and communal areas all have mastic that ages together across a building, which is why block-wide programmes make sense.
A 12-month guarantee applies to all our work in Greater London. Should something we installed fail, call the office on 01277 525 020 or email us and we’ll come back to it.
- Location
- South Croydon (CR2, CR8, CR0)
- Wider area
- Greater London
- Guarantee
- 12 months on our workmanship
- Quote
- A fixed quote before we start
- Phone
- 01277 525 020
- Updated
- 3 November 2026
When something else is needed
A few problems need another trade or a different fix, and we point that out rather than sealing over them:
- Old mastic suspected of containing asbestos, which must be tested and dealt with by a specialist first
- Leaks from above rather than through a joint
- Glazing that needs replacing
If you are not sure, just speak to us on 01277 525 020 or email drawings and photos and we will give you a straight answer before you book.
Where we work in South Croydon
- Balcony and threshold joints
- External wall and movement joints
- Communal entrances and stairwells
- Shopfronts below residential blocks
- Window and door perimeters on blocks
- Communal kitchens and washrooms
How a job runs
The first thing on site is a walk round with your contact, agreeing which joints are in scope, where to start and what must stay open. After that, any old or failed material is removed, each joint is prepared and the new sealant goes in. In South Croydon, most buildings stay in use during the work, so we agree zones and timings with the building or facilities manager. Areas are handed back as each section is finished.
- First comes a look at the joints and, for older buildings, the asbestos records.
- The products and programme are set out in a fixed quote.
- Failed mastic is removed completely.
- The joints are prepared and resealed with the right product.
- Buildings are completed in turn.
Before we start on site
- Explain the parking and delivery arrangements
- Send asbestos survey details if the building is pre-2000
- Move anything stored against the joints
Quotes
A handful of photos and a postcode is the fastest way to a quote. Send them through the quote form, or phone 01277 525 020 or email us to discuss it first.
Related advice
For managing agents and facilities managers
For main contractors, we work as the sealant subcontractor on new-build and refurbishment projects. Programme, specification and site rules come first.
Planned maintenance programmes are welcome: resealing failed joints building by building, on a schedule that suits your budget. Sites in South Croydon can sit alongside others in a wider programme.
What happens if it’s left?
Mixed repairs by different contractors leave a patchwork of products and colours. A block-wide reseal gives one product, one colour and one guarantee and one 12-month guarantee. In South Croydon, each extra visit means more notices, permits and disruption, so cutting the old sealant out fully and doing it right once is the better route.
Larger quantities, tricky access or phasing all shape the price. Site requirements like inductions and permits play a part as well.
Why us?
- Specification-led, product-correct work
- CHAS accredited contractor
- Constructionline member
- Old sealant cut out, never sealed over
Take a look at how commercial sealant jobs are priced and our accreditations and insurance.
Doing it in-house
Some joints are best left to specialists: fire-rated seals that must follow a tested detail, trafficked floor joints and external movement joints among them. A poor seal in places like these tends to cost more to put right later.
Using site staff can make sense for a small touch-up, but larger jobs are different: a specialist brings efficiency, a consistent finish and a 12-month guarantee.
Places near South Croydon
Other services in South Croydon
Questions about South Croydon
Can you work in a care home near South Croydon with residents in?
Yes, with the manager deciding the order and timing of rooms. We follow the home’s own procedures throughout.
Do you work for managing agents with blocks near Sanderstead station?
Yes, we work for agents, landlords and housing associations with blocks of every size. Send the address, photographs of the elevations and your access arrangements, and we’ll give a fixed quote.
Do you work with property factors and landlords?
Yes. Managing agents, property factors in Scotland, housing associations and landlords with block or commercial portfolios are our main clients for this work, and we quote building by building or as a programme.
Do you supply RAMS and insurance details?
Tell us what site paperwork you need (RAMS, insurance certificate, CSCS details) and we’ll confirm with the quote. We hold CHAS accreditation and Constructionline membership.
How long does a typical visit take?
We plan the time on site around your programme and access. You’ll have an expected duration with the quote.
What if the old mastic contains asbestos?
In older buildings, old mastic can contain asbestos. We check the asbestos register or survey before disturbing it and suspect material is tested first.
Can you reseal a whole block or estate?
Yes, planned programmes suit estates and portfolios. The quote can be split however suits your budgeting.
For owners and agents in South Croydon
The 2 miles around South Croydon include seven care or nursing homes. Care home owners need frame and external mastic kept sound without unsettling residents. In London, mastic work on a block goes through the managing agent or landlord, with notice to residents. We work to your notice and access plan.
For owners of several units at places like Capital Business Centre, which lies east of South Croydon, one programme can deal with frame and external mastic across the lot. Schools and community buildings such as Purley Oaks Primary School need frame and external mastic kept sound like any building. Older buildings near South Croydon, from historic houses such as Addington Palace (to the east of South Croydon) to more modest stock, need compatible products when frames are resealed.
South Croydon is about 1 mile south of Croydon, in Greater London. Across the CR2 postcode area, the process is the same: details in, fixed quote out, then sealing and a 12-month guarantee. 764 places across Greater London fall within our area, South Croydon among them. There’s a separate page for London, roughly 10 miles from South Croydon.
Work on mastic joints is covered throughout CR2, CR8 and CR0. For a building on Edgar Road, Bynes Road and Grange Road or nearby, send details and we will quote for mastic joints. Close to South Croydon, our area also takes in Croydon (1 mile north), Coombe (1 mile north-east), Sanderstead (1 mile south-east), Riddlesdown (2 miles south) and Selsdon (2 miles east). A short drive away, we cover London (10 miles north), City of Westminster (11 miles north), Marylebone (12 miles north), Kensington (11 miles north-west), St Pancras (12 miles north) and Shoreditch (12 miles north).
Around South Croydon
In South Croydon, that means premises near The Purley Arms, Harris Academy Purley and Duppas Hill, among other places. There’s a railway station in South Croydon itself: Sanderstead station. A little further out are Purley War Memorial Hospital (1.2 miles south-west) and Croydon Airport Visitor Centre (1 mile west). Green spaces nearby include Roundshaw Downs and Duppas Hill.
Maintenance after handover
Cleaning and maintenance staff play a part too. Share these points with them:
- Have the asbestos survey to hand for older buildings
- Ask residents or tenants to report leaks and draughts early
- Protect low-level joints in entrances
- Keep a record of when each building was resealed
Ask residents or tenants to report draughts or leaks round windows early. A quick report keeps a small repair small.
Leaks at window perimeters spoil finishes and can affect frames. Early resealing is far simpler than repairs inside.