North Lanarkshire · Scotland
Mollinsburn Window Mastic
Window mastic across Mollinsburn and nearby, with old sealant always removed completely and a one-year guarantee.
- White mastic on grey or black frames
- Damp patches on the reveal after heavy rain
- Cracked internal joints between frame and plaster
Window mastic in Mollinsburn, done properly
If you can feel air around a shut window, the gap is often at the frame. Resealing that joint can make a room feel noticeably less draughty and quietens the whistle on windy days. If the draught is through the window seals instead, we’ll tell you. We work on aluminium frames, uPVC windows and window sills, and people most often call us about mastic that has split away from the wall and draughts coming in around windows and doors.
Outdoor sealant needs a dry surface, so window work around Mollinsburn is planned around the weather. Let us know about access to every frame, including any upstairs.
A one-year guarantee comes as standard, so you’re not left on your own once the job is done.
- Where
- Mollinsburn (G67)
- Region
- North Lanarkshire
- Guarantee
- 12 months on all our work
- Price
- A clear price before we start
- info@mrmastic.co.uk
- Updated
- 26 October 2026
Leave it or put it right?
Not every sealant suits a window. Decorators’ caulk and bathroom silicone are not designed for outside joints that move. An exterior, low-modulus sealant stays flexible in sun and frost. Exposed walls in smaller Scottish places take a lot of wind and rain, and once water gets behind a failed joint, damp in stone or harled walls is slow to dry out.
Rather than a set price list, we look at what your job involves: how many joints, what’s in them now and how we reach them. The price is agreed before we begin.
Why book with us
- Sanitary silicone with an anti-fungal additive in wet areas
- We agree the colour with you first
- 180+ five-star Google reviews
- Trusted Arbo and Everbuild sealants
Take a look at what affects the cost or customer reviews.
Mollinsburn homes and the weather
Mollinsburn is in the west of Scotland, which is wetter than the east, which means the mastic around window and door frames has to cope with a lot of rain. Private landlords in Scotland must meet the Repairing Standard, which includes keeping a home wind and watertight, and failed outside joints work against that.
For landlords with property near Greenfaulds station, renewing tired window mastic between tenants heads off draught and damp complaints.
Mollinsburn is about 3 miles south-west of Cumbernauld, in North Lanarkshire. Anywhere in G67, we cover window mastic for homes and businesses. Our area takes in 89 places across North Lanarkshire. You can also see our page for Glasgow, roughly 10 miles from Mollinsburn.
All of G67 is covered for window mastic. You’ll find streets such as Main Road, Airdrie Road and Cumbernauld Road, all of which we cover. If you’re just outside Mollinsburn, we cover Annathill (1 mile south-east), Westfield (1 mile north), Moodiesburn (1 mile west), Condorrat (1 mile north-east) and Greenfoot (2 miles south-east). Further out, we also cover Motherwell (9 miles south), Cumbernauld (3 miles north-east), Coatbridge (5 miles south), Airdrie (5 miles south-east), Wishaw (11 miles south-east) and Bellshill (7 miles south).
Near you in Mollinsburn
For rail, the closest station is Greenfaulds station, roughly 2.4 miles north-east of the centre. Nearby you’ll also find Antonine Centre (3 miles north-east) and Woodilee Hospital (3.5 miles west). The countryside around Mollinsburn includes Bar Hill and Gadloch.
Looking after it afterwards
How long the joints last depends on use and care. Here’s what we suggest:
- Keep paint off silicone joints
- Wipe condensation off the frames
- Clear any debris from frame drain holes
- Keep jet washers away from the mastic
Most silicone sealants will not take paint, so mention any painting plans before work begins. There are paintable sealants for joints that need it.
Draughts get worse, not better. As old mastic keeps shrinking, the gap widens, and a cold room gets colder. Resealing closes it.
Different surfaces, different methods
Window sills
Every drop off the glass ends up on the sill, so the sill ends and the joint under the frame are vital. Each is cleaned out and resealed.
Patio & French doors
Patio and French doors have the longest joints on most houses. Most leaks start at the bottom corners, so they get particular care.
What we do, step by step
On the day, there’s very little for you to do. Show us the job and we’ll take it from there. The job generally takes a morning for a couple of windows and a door, including the tidy-up. Outside jobs in Mollinsburn need a dry day, because sealant will not bond to a wet joint, so external jobs may need to move if the day turns wet. Indoor work goes ahead whatever the weather.
- We check how each frame can be reached safely.
- Old, cracked mastic is removed completely, along with any loose debris.
- The surfaces are cleaned and left dry.
- Backing rod fills deep voids and the sealant goes in on top.
- We tool the joint so water runs off, then clear up.
How to prepare
- Plan for the work area to be out of bounds to pets and children
- Tell us about access, such as stairs, a lift or high-level joints
- Let us know about earlier repairs to the joints
Ask for a quote
For a quick quote, get us on the phone, or email us if that’s easier. Describe what needs sealing and we will explain what’s involved before giving you a price.
Read more
For landlords and businesses
In hotels, rooms out of use cost money, so the work can be planned room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.
If you manage several properties in or around Mollinsburn, jobs at different addresses can be quoted together. Just tell us the addresses and what each one needs, and pictures by email help.
Also near Mollinsburn
Other services in Mollinsburn
Questions from Mollinsburn
Do you work for landlords with property near Greenfaulds station?
Yes, rental work is part of what we do. Just drop us a line at info@mrmastic.co.uk and tell us about the property, and we will give you a clear price.
Do you cover smaller places like Mollinsburn?
Yes, smaller places are covered as well as towns. Our work covers the whole of Scotland. Let us know about access, parking and anything unusual about getting there when you book.
Do you have sealant for grey or black windows?
Yes. We can use white, brown, anthracite grey, black or clear.
How long before the joint can be used?
Different products cure at different speeds, so follow the cure time we give you.
Do you work on first-floor windows?
Yes, in most cases. Access is planned before we start.
How much does window mastic cost in Mollinsburn?
The cost depends on the size of the job, access and how much old sealant has to come out. Call for a quick quote.
Can new sealant go over the old?
No, because it fails. We remove every bit of old sealant first.
Is the new sealant paintable?
Most silicone can’t be painted. If you plan to paint, tell us first and we can use a paintable sealant where it suits the joint.
When it is not the sealant
In fairness, some problems need a different trade:
- A failed sealed unit that has misted up
- Damp problems in the wall away from the window
- Broken hinges, locks or handles
If in doubt, email us at info@mrmastic.co.uk and we’ll say what we think.
Surfaces we seal
- uPVC windows
- Timber windows & doors
- Patio & French doors
- Aluminium frames
- Window sills
- Composite doors
Do you need window mastic in Mollinsburn?
Older frames were often sealed with products that set hard. Once it’s rigid, every bit of frame movement pulls at it, and a gap opens along one edge.
It’s worth asking for a quote if you see:
- Cold air getting in at the frame edge
- Water coming in at the bottom corners of a door
- Cracked sealant at the sill ends
- Sealant in the wrong colour for the frame
For site and facilities teams at buildings such as Greenfaulds High School, its window and door frames need their mastic kept sound, just like a home’s.
Before you book anyone
- What happens if the job turns out different
- What guarantee comes with the work
- Is VAT in the price?
- Which colour the sealant will be