East Lothian · Scotland
Window Mastic in Cockenzie and Port Seton
Window mastic across Cockenzie and Port Seton and nearby, with every bit of old sealant taken out first.
- Black, perished sealant on frames
- Sealant in the wrong colour for the frame
- Mastic that has split away from the wall
How we handle window mastic in Cockenzie and Port Seton
Most frames have an outside joint and an inside one. The external joint is the weather seal; the internal joint closes the gap to the plaster and stops draughts. Either or both can be done. Typical jobs include leaking joints at the ends of sills and rain getting in at the frame or under the sill, on timber windows & doors, uPVC windows and patio & French doors.
Many older Scottish homes still have timber windows set into stone walls. Those suit a traditional sand mastic or a neutral-cure sealant, not an acetoxy silicone that can attack some stone.
All our work comes with a 12-month guarantee, wherever you are in East Lothian.
- Where
- Cockenzie and Port Seton (EH32)
- Region
- East Lothian
- Cover
- A year, on every job
- Price
- A clear price before work begins
- info@mrmastic.co.uk
- Updated
- 26 October 2026
Landlord and commercial work in Cockenzie and Port Seton
Hotels need rooms back in use, so we plan the work room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.
Letting agents often deal with us directly. Send the address, what’s needed and the access arrangements and we’ll give you a quote.
DIY sealant or a professional job?
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is, and the work is guaranteed for a year.
Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.
Cockenzie and Port Seton questions
Will you come out to Cockenzie and Port Seton?
Yes, smaller places are covered as well as towns. Our work covers the whole of Scotland. Just mention lanes, gates or anything else about the route when you book.
Does the coastal weather in Cockenzie and Port Seton affect outside sealant?
Coastal homes put outside sealant through more weather than inland ones, so the choice of sealant and the preparation matter even more. It’s worth checking the walls that face the sea first.
Do I need to be at home?
If the work is inside, we need someone to let us in. Once we have agreed the job, you don’t need to watch us work.
Is the new sealant paintable?
Not normally, if it’s silicone. Tell us your decorating plans and we will pick a sealant to suit.
Is the work guaranteed?
Yes, for 12 months. A yearly look at the joints helps them last.
Can I do it myself?
For a simple, easy-to-reach joint, a careful DIYer can do a reasonable job. The usual mistakes are sealing over old sealant, sealing a damp joint and using too much.
Can I add another job to the visit?
Yes. More than one area can go on one quote.
Do you seal inside as well as outside?
Yes, we do both. Inside, the joint between frame and plaster is sealed neatly.
Looking after it afterwards
To keep the joints looking good and working properly:
- Look round the frames every year or so
- Make sure the drainage slots aren’t blocked
- Don’t aim a pressure washer at the joints
- Ventilate rooms so frames do not stay wet inside
Clean the frames with mild soapy water, and keep solvents and harsh chemicals off the joint.
Water trapped behind a failed joint can start rot in timber frames and sills. Rotten timber needs a joiner, not a sealant, so early resealing is worth it.
What we do, step by step
On the day, there’s very little for you to do. Point us to the joints and we will get on with it. The job generally takes most of a day for a typical house, less for a few frames. For a place like Cockenzie and Port Seton, longer drives are planned in advance. Mention tracks, gates, ferries or anything else about the route.
- We check how each frame can be reached safely.
- Old, cracked mastic is removed completely.
- The surfaces are cleaned and left dry.
- Deep voids are backed, then the sealant is gunned in.
- We tool the joint so water runs off, then clear up.
Getting ready for the visit
- Mention any sign-in or site rules at work premises
- Clear items away from the joints we’re working on
- Plan for the work area to be out of bounds to pets and children
How to get a quote
For a quote, email us at info@mrmastic.co.uk and tell us where the job is and what the problem looks like. We will give you a clear price before any work starts.
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What we can’t put right
To be straight with you, there are a few things sealant won’t fix:
- Faulty window hardware
- Penetrating damp from a failed cavity tray or render
- A door that needs adjusting, rehanging or new seals
If you’re not sure, just drop us a line at info@mrmastic.co.uk and we will give you a straight answer.
What we seal
- Timber windows & doors
- Window sills
- Aluminium frames
- Composite doors
- Patio & French doors
- uPVC windows
Frames and glazing around Cockenzie and Port Seton
Cockenzie and Port Seton is within about 1 mile of the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. That is hard on the mastic around window and door frames, especially on the side facing the sea. With historic houses such as Hamilton House (about 1.4 miles south-west) nearby, there’s older building stock in the area around Cockenzie and Port Seton as well as newer homes. Where a home is older, older frames set in brick or stone need a sealant that suits them, and sometimes that is traditional sand mastic.
For an older house near a landmark such as Chalmers Memorial Church, the joint between an old wall and a newer frame is usually the first place rain gets in. For landlords with property near Prestonpans station, sound mastic around windows and doors keeps out the draughts and damp that tenants notice first.
Cockenzie and Port Seton is about 4 miles north-east of Musselburgh, in East Lothian. We carry out window mastic for householders, landlords and businesses in Cockenzie and Port Seton, as part of our work across East Lothian. Our East Lothian coverage runs to 48 places, Cockenzie and Port Seton among them. We also work in Edinburgh, around 10 miles away.
Our applicators cover all of EH32 for window mastic and the streets around it. We cover properties on High Street, Park View West and North Seton Park. Being close to the B1348 and B6371, Cockenzie and Port Seton is easy for our applicators to reach for window mastic. We also cover the places around Cockenzie and Port Seton: Seton (1 mile south), Prestonpans (1 mile south-west), Tranent (2 miles south), Prestongrange (2 miles south-west) and Macmerry (3 miles south-east). Further out, we also cover Musselburgh (4 miles south-west), Haddington (7 miles east), North Berwick (11 miles north-east), Wallyford (3 miles south-west), Gullane (7 miles north-east) and East Linton (11 miles east). As one of the bigger places in East Lothian, Cockenzie and Port Seton has every kind of property, from flats to offices.
Near you in Cockenzie and Port Seton
The closest station to Cockenzie and Port Seton is Prestonpans station, about 1.5 miles south-west of the centre. Nearby you’ll also find Seton Castle (0.8 miles south-east) and Battle of Prestonpans Jacobite Museum (1.5 miles south-west).
Places near Cockenzie and Port Seton
Other services in Cockenzie and Port Seton
Why it’s worth doing now in Cockenzie and Port Seton
Running fresh sealant over the old joint is tempting, but new sealant cannot bond to old, crumbling mastic. It peels before long, and water still gets in behind. The old mastic has to come out. Around Cockenzie and Port Seton, water from a failed joint in an older stone home can soak into timber and plaster.
What it costs depends on how much there is to do, how much old material has to come out and access to the work. You’ll have a clear quote before any work starts.
What you get with us
- 180+ five-star Google reviews
- Fully insured
- 20+ years of sealant experience
- Sanitary silicone with an anti-fungal additive in wet areas
Take a look at how sealant jobs are priced or customer reviews.
When to call us in Cockenzie and Port Seton
Sills take more water than any other part of a window, so the sill ends and the joint below the frame are common leak points. Failed sealant there lets rain into the wall or behind the frame.
The most common problems we see are:
- Gaps where the sill meets the wall
- Old mastic that has gone black or come away
- Cold air getting in at the frame edge
- Water coming in at the bottom corners of a door
If you look after a building such as Preston Lodge High School, larger buildings have plenty of frames, and the mastic around each one ages.
Before booking anyone
- Whether the sealant suits the joint
- What insurance they hold
- What guarantee comes with the work
- What happens if they find a problem under the old sealant