Hampshire · England
Window & door mastic in Hyde, Hampshire
Problem with your window and door frames in Hyde? We cut out the old, prepare the joints and apply the right sealant, and the work is guaranteed for a year.
- Old mastic that has gone black or come away
- Cracked or shrunken mastic around the frame
- Whistling draughts around closed windows
When to call us in Hyde
Water runs down the glass onto the sill, and the ends of the sill, where it meets the wall, are where it gets in. Failed sealant there lets rain into the wall or behind the frame.
If you can see any of these, it’s time to have the joints looked at:
- Old mastic that has gone black or come away
- White mastic on grey or black frames
- Cracked or shrunken mastic around the frame
- Gaps between the frame and the inside reveal
For landlords with property near Winchester station, cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets.
What your quote should include
- Whether they’re fully insured
- How much experience the applicator has
- Whether they seal over old material or remove it
- What the cure time is
Window mastic in Hyde
Colour matters on a frame. We can seal in white, brown, anthracite grey, black or clear, so the bead blends with the window rather than framing it. If you’re dealing with untidy mastic left by window fitters and white mastic on grey or black frames, we can put it right, on timber windows & doors, composite doors and aluminium frames alike.
Homes around Hyde range from older properties to newer houses, and their windows range just as widely. The right sealant depends on the frame and on what it sits in.
A 12-month guarantee comes as standard.
- Location
- Hyde (SO23, SO22, SO20)
- Region
- Hampshire
- Guarantee
- 12 months on all our work
- Quotes
- Quoted before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
DIY versus a professional finish
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs need the right product, the right access and the right method.
Sealing over old silicone is the commonest DIY error. New silicone will not bond to old, so it lifts and traps water and mould underneath. Everything old must be removed first.
Questions from Hyde
Can you do window mastic in Hyde?
Yes, Hyde is within the area we cover. Our work covers London and the South East. Just phone 0345 464 0079 or email us with a few details of the job.
Can you help a landlord with a rental near Winchester station?
Yes, rental work is part of what we do. Just ring 0345 464 0079 or send us an email and tell us about the property, and we will give you a clear quote.
Do you take out the old sealant first?
Yes, every time. New silicone doesn’t stick to old silicone, so the joint is cleaned back first.
Is the new sealant paintable?
That depends on the product. Silicone is not paintable, but some hybrid sealants are. Tell us if you are decorating and we’ll choose accordingly.
Will it make a mess?
Tidy work is part of the job. We protect what’s around the joints, and we clear up when we’re done.
Can you seal over the old sealant?
No. New silicone won’t bond to old silicone, and anything trapped underneath, including mould and water, stays there. We remove it all first.
Where is Mr Mastic based?
We work from Crawley. We cover Hyde and the rest of Hampshire.
How long does it take to reseal the windows on a house?
That depends on the number of frames, how they’re reached and the state of the old mastic. You’ll know the timing when we quote.
What sealant work can’t fix
Honest advice matters more to us than a booking, so here’s what new sealant will not do:
- A failed sealed unit that has misted up
- Draughts through the window seals rather than the frame
- Damp coming through the wall itself rather than the frame joint
If in doubt, call 0345 464 0079 or email us and we’ll say what we think.
What we seal
- Timber windows & doors
- Composite doors
- Patio & French doors
- uPVC windows
- Window sills
- Aluminium frames
Nearby places to Hyde
Also in Hyde
What happens on the day
When we get to you, we compare the joints with what we discussed. If we find something unexpected, we talk it through with you first. After that, the work takes a few hours for a few frames, or a day or more for a whole house. In a smaller place like Hyde, parking is seldom the issue; lanes, gates and long drives are worth mentioning. For outside work, side access and the height of the joints help us plan.
- Each frame is looked over and we agree which ones need resealing.
- The old mastic is cut out and scraped back to clean surfaces.
- Where the gap is deep, backing rod goes in first.
- The new sealant goes on in white, brown, anthracite grey, black or clear to suit.
- Every joint is tooled smooth and checked before we leave.
Getting ready for the visit
- Mention any leaks or damp you’ve noticed
- Let us know about earlier repairs to the joints
- Keep pets and children clear of the area while we work
How to get a quote
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is, and email photos if that is easy.
Related advice
Keeping the joints in good condition
So the new joints stay in good condition:
- Repaint timber before it’s bare
- Keep drainage slots and sill grooves clear
- Don’t aim a pressure washer at the joints
- Use gentle cleaners on frames and sealant
Wipe the frames with soapy water when you clean the windows, and keep solvents and harsh chemicals off the joint.
Draughts get worse, not better. As old mastic keeps shrinking, the gap widens, and a cold room gets colder. A new joint closes it up.
What the job involves on each surface
Window sills
Every drop off the glass ends up on the sill, so the joints at each end and underneath matter. They’re cut out and resealed with exterior sealant.
Patio & French doors
Not every patio door leak is a mastic problem: worn seals, blocked drainage slots or a poor threshold detail can be the cause. We look for the cause first.
Why deal with it now?
Working on frames from a ladder with a sealant gun isn’t easy, especially upstairs. A professional job is cut out properly, backed where needed and finished neatly, in a sealant suited to the wall. Homes in smaller places like Hyde can face more weather, and failed outside joints let damp into walls. Inside, a split seal lets water into floors and panels just as it would anywhere.
What it costs depends on the size of the job, how hard the old material is to remove and access to the work. We give a clear quote before any work starts.
What you get with us
- Colour agreed with you before we start
- Anti-fungal silicone where joints get wet
- Experience in homes, commercial sites and hotels
- 20+ years of sealant experience
See what affects the cost and customer reviews.
What window mastic looks like in Hyde
Rainfall in the South East is lower than in much of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Managing a site like St Bede Church of England Primary School? Then the mastic around its windows and doors needs looking after like any other building’s. For an older house near a landmark such as St Bartholomew's Church, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
Hyde is about 1 mile north of Winchester, in Hampshire. From the centre of Hyde to the outskirts, window mastic is available for homes and businesses alike, from flats and houses to offices and hotels. Our Hampshire coverage runs to 683 places, and Hyde is one of them. Southampton is on our list too, about 11 miles from Hyde.
Here we cover the SO23, SO22 and SO20 postcode area for window mastic. Whether your property is on Elm Road, Swan Lane and City Road or anywhere close by, our applicators can take on the job. Neighbouring places we cover for window mastic include Abbotts Barton (1 mile north-east), Winchester (1 mile south), Weeke (1 mile west), Highcliffe (1 mile south-east) and Bar End (1 mile south). Further out, we also cover Eastleigh (7 miles south), Andover (12 miles north-west), Totton (13 miles south-west), Chandler's Ford (7 miles south-west), Hedge End (11 miles south) and Romsey (9 miles south-west).
Near you in Hyde
Typical jobs here are in homes near Peter Symonds College, Leigh House Hospital and The King Alfred pub, among other places. Hyde has its own railway station: Winchester station. Nearby you’ll also find Winchester Castle (0.6 miles south-west) and Royal Observer Corps Museum (0.5 miles north). Not far away are Winnall Moors and Twyford Down.