Angel mastic sealing
Commercial sealant work in Angel for contractors, FMs and building owners: mastic sealing for building owners, managing agents and housing associations, quoted at a fixed price.
- A mix of products and colours from past repairs
- Brittle perimeter mastic across a building
- No planned programme for sealant
Mastic sealing for Angel sites
Photos, a specification or a quick description of the joints is enough to start a fixed quote.
What we’re called out for in Angel
Much failed sealant was laid on dirty, dusty or damp surfaces. Without clean, sound faces and a primer where the product needs one, the bead peels off one side.
These are often picked up first by site or facilities staff:
- The same joint failures repeated across a portfolio
- Cracked, hardened mastic round windows on a block
- A mix of products and colours from past repairs
- Leaks at window and door perimeters
If you manage student housing near a university such as Paris Dauphine University - London Campus, under half a mile to the west of Angel, the summer turnaround is the time for mastic.
Before you book anyone
- What site paperwork they can supply
- Whether old or failed sealant will be cut out, not overlaid
- Is depth set with backing rod, or bond-breaker tape in shallow joints?
- Whether primer will be used where the manufacturer specifies it
How we handle mastic sealing in Angel
We diagnose before we prescribe: which joints have failed, why, and whether sealant is the right answer. Old mastic is removed entirely, the faces prepared, primer used where the maker specifies it and new sealant tooled in and backing rod used wherever a joint is deep. The enquiries we see most involve water getting in round frames after rain and complaints coming in block by block, across balcony and threshold joints, communal kitchens and washrooms and window and door perimeters on blocks. Looking for mastic applicators who cover Angel? Mastic Doctor has worked for contractors, FMs and building owners since 2005, with CSCS-carded applicators.
London’s ULEZ covers every borough, and parking and loading rules vary street by street. For block-wide work, a place to park and store materials saves time on every visit.
Every job is signed off with a 12-month guarantee. The promise is simple: if our work fails within that year, we put it right.
- Location
- Angel (N1, N1P, EC1V)
- Region
- Greater London
- Cover
- 12 months on our workmanship
- Quote
- A fixed quote before we start
- Phone
- 01277 525 020
- Last updated
- 3 November 2026
For owners and agents in Angel
For a London block, the agent or landlord normally handles notices to residents and access to flats. We work to your notice and access plan. Angel has three care or nursing homes no more than 2 miles away. For owners and operators of care buildings, window perimeters and external joints are best renewed in planned phases around residents.
Trustees of buildings like St Mark's Church can bring frame and external mastic into a planned maintenance list. If you look after a block within reach of London Kings Cross station, which lies west of Angel, frame and balcony mastic can be renewed on one programme.
Angel is about 1 mile north-east of St Pancras, in Greater London. Businesses, contractors and managing agents in Angel can call on us for mastic joints, as part of our coverage of Greater London. Angel is one of 764 places in Greater London on our list.
We take on mastic joints across the N1, N1P and EC1V postcode area, for business premises of every kind. For a building on City Road, Noel Road and Dewey Road or nearby, we can quote for mastic joints. You will find Angel on or near the A501, so getting applicators and materials to site is simple. Sites close to Angel are covered too, including Pentonville (1 mile north-east), Clerkenwell (1 mile south), Islington (1 mile north), St Pancras (1 mile south-west) and Kings Cross (1 mile west). Nearby towns on our patch include Kensington (5 miles south-west), Walthamstow (5 miles north-east), Hampstead (3 miles north-west), Ruislip (13 miles west), Brompton (4 miles south-west) and Stockwell (4 miles south).
Landmarks near Angel
Recent enquiries here include premises near Risinghill School, Pilsudski Institute of London and The Angel pub. Also close by are Barnard Park (less than half a mile north-west) and Elizabeth Garrett Anderson School (less than half a mile west). Angel’s nearest station is London Kings Cross station, roughly 0.7 miles west of the centre. Nearby you will also find Finsbury Health Centre (0.5 miles south) and Museum of Funeral History (less than half a mile south). Green spaces nearby include Barnsbury Wood and St. James's Park Lake.
General trades versus a specialist
There’s also the paperwork. Main contractors and clients often ask for CSCS cards, RAMS and insurance details, and our CSCS-carded applicators are used to working under those rules.
A short, simple internal joint is often within reach of a maintenance team. Where it goes wrong is preparation: new sealant over old, damp or dusty faces, or the wrong product for the movement.
Our process
Occupied buildings need a little choreography. The work area is signed and kept contained, keep walkways clear and move on in phases so staff and visitors can carry on around us. In Angel, most buildings stay in use during the work, so zones and timings are agreed with whoever manages the building. Areas are handed back as each section is finished.
- A building-by-building inspection lists the failed joints.
- You get a fixed quote, per block or for the whole programme.
- Dates and areas are agreed so occupiers can be told.
- Failed sealant is removed and the faces prepared.
- Joints are resealed and tooled.
- We check the finished work and confirm the guarantee.
What we need from you
- Tell staff and tenants when we will be in
- Point out any areas we must not close
- Send asbestos survey details if the building is pre-2000
Quotes
Every quote starts with the facts: what’s there, how much of it, how we reach it and what’s specified. Share whatever details you have and we will fill any gaps with a visit.
Read more
When it isn’t the sealant
Our job is the joint, not everything around it. On its own, sealant can’t deal with:
- Failed window or door frames, which need a window contractor
- Cracked or crumbling render, brick or stone at the joint edges (we will tell you if so)
- Water coming in from the roof or rainwater goods
Not sure which it is? You can phone 01277 525 020 or use the quote form and we will tell you honestly before you book.
Surfaces we seal
- Communal entrances and stairwells
- Window and door perimeters on blocks
- Balcony and threshold joints
- External wall and movement joints
- Communal kitchens and washrooms
- Shopfronts below residential blocks
Angel: questions and answers
Is Roman Way Industrial Estate, near Angel, within your area?
Yes. Our area takes in Angel and its surroundings, with estates and business parks such as Roman Way Industrial Estate included. To start, just ring 01277 525 020 or email us with the unit, the joints involved and your access times.
We manage a building near London Kings Cross station. Can you help?
Yes, and several blocks can go on one quote. Send the address, photos of the elevations and your access arrangements, and we’ll give a fixed quote.
How long do sealant joints last?
There’s no fixed lifespan: movement, exposure, cleaning, traffic and the product all play a part. Sealant joints are maintenance items, so inspect them regularly.
Is it fine to apply new sealant on top of old?
No. Overlaying old sealant is a frequent cause of early failure, so it all comes out first.
Can you work to our specification?
Yes. We follow the specification, along with the manufacturer’s installation guidance, and any queries are raised before we start.
How do you handle work on occupied blocks?
We plan around people living or working in the building. Dates and areas are agreed with you so residents or tenants can be told, and entrances stay in use.
Can you reseal a whole block or estate?
Block-wide and estate programmes are common. The quote can be split however suits your budgeting.
Nearby places to Angel
More services for Angel
What sets the cost
Sealant work doesn’t have a standard rate, since sites vary so much. What we look at:
- The product specified
- Joint width, depth and condition
- Access and working height
- Phasing around occupants
The work involved drives the cost: stripping out, preparation, sealing, access and phasing. Call for a quote and we will explain how it’s made up.
Sending details for a quote
It doesn’t need to be a full survey. A few details are enough to get going:
- Approximate linear metres or a joint schedule
- Whether an asbestos survey exists
- The site address and postcode
- Access details, including height
Let us know the site, the scope and your timescale, and a fixed quote will follow. The easiest way is to call the office on 01277 525 020 or use the quote form.
Surface by surface
Communal areas
Communal areas stay in use while we work. Work is planned in sections.
Commercial and mixed-use buildings
Mixed-use buildings combine shops below with flats or offices above the programme has to suit everyone. We plan around the site hours and access windows you give us.