Hampshire · England
Glazing & conservatory sealant in Keyhaven, Hampshire
We cover Keyhaven for glazing silicone for conservatories, rooflights, glass panels and shower screens. Old material cut out, joints cleaned and sealed neatly and every job guaranteed for a year.
- Conservatory leaks at frame and glazing joints
- Leaking glazing joints on a rooflight
- Shower screens leaking along the wall or tray
What happens on the day
A visit follows a simple pattern: we check the joints, mask and protect the surrounding surfaces, do the work and tidy away. Most jobs take a few hours for most jobs. In a small place like Keyhaven, access is generally the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We look at the glazing and agree which joints need resealing.
- We cut away the failed silicone.
- The surfaces are cleaned with a suitable solvent.
- We apply and tool the new silicone.
- We inspect the work and test it where we can.
Before we arrive
- Mention any tricky access
- Let us know about earlier repairs to the joints
- Try not to wet indoor joints just before the visit
How to get a quote
It all starts with a short chat. Tell us what’s wrong, where it is and how much there is, and we’ll talk you through what we’d do. When it suits you, ring 0345 464 0079 or send us an email.
Related advice
How we handle glazing silicone in Keyhaven
Our work covers conservatory joints, rooflights and glass panels, as well as frameless shower screens and glass balustrade bases. The old sealant comes out, the joint is cleaned and new silicone goes in. We’re often asked to deal with leaks from the base of a shower screen and sealant that was laid over old silicone and failed, on glass-to-glass joints, glass-to-frame joints and conservatory frames.
Outdoor sealant needs dry, clean surfaces, so work on frames around Keyhaven is planned for dry weather. Tell us about access to every side of the house, including upper-floor windows.
You’re covered for a year from the day we finish. If there’s a problem with it, please phone 0345 464 0079 or send us an email.
- Where
- Keyhaven (SO41)
- Region
- Hampshire
- Guarantee
- A year, on every job
- Price
- A clear quote up front
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Aftercare tips
Once the sealant has cured, a few habits help it last:
- Avoid scraping close to the bead
- Use gentle products around the joints
- Clear the conservatory gutters regularly
- Get a new leak looked at quickly
Follow the cure time we give you before the joints get wet. After that, clean glass with a mild cleaner.
Cracked glazing silicone means the joint has failed. Resealing now is a small job compared with fixing water damage later.
Can I do it myself?
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.
If you are set on DIY, put the effort into preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it fails, we can still redo it.
Do you need glazing silicone in Keyhaven?
Sealant laid over old sealant does not last. Plenty of leaks come from a quick top-up over the old bead leaving a path for water.
Keep an eye out for any of the following:
- New silicone smeared over old sealant
- Cracked silicone between glass panels
- Drips on the inside of a conservatory window
- Leaking glazing joints on a rooflight
For an older house near a landmark such as Church of All Saints, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Questions to ask before booking
- How much experience the applicator has
- What product goes in the joint
- What insurance they hold
- Whether all the old sealant comes out first
How the job changes by surface
Conservatory frames
Leaks often start where the frame meets the wall. We cut out the old sealant and reseal.
Shower screens
Most shower screen leaks come from the wall or tray joint. Both are resealed with anti-fungal silicone.
Common questions in Keyhaven
Do you cover smaller places like Keyhaven?
Yes. Keyhaven is within the area we cover, which takes in towns, villages and rural addresses. Our work covers London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Can you help a landlord with a rental near Lymington Town station?
Yes. We work for landlords and letting agents as well as homeowners. Just ring 0345 464 0079 or send us an email with the address and what needs doing, and we will send you a clear quote.
Should I try DIY first?
Some simple jobs can be done by a careful DIYer. Most DIY failures come from sealing over old material, wet joints or too much sealant.
Do you guarantee glazing sealant work?
All our work has a 12-month guarantee.
What do you need from me for a quote?
Just the basics: where it is, what you’ve noticed and how we reach it. Then call 0345 464 0079 or email us.
Which products do you use?
The product depends on the job: sanitary silicone where it gets wet, and sealants suited to movement or weather elsewhere. Brands we use include Arbo and Everbuild.
Do you take out the old sealant first?
Yes, always, and completely. New silicone doesn’t stick to old silicone, so any old material comes out before anything new goes in.
Where is Mr Mastic based?
We work from Crawley. We cover Keyhaven and the rest of Hampshire, along with the rest of our area.
Landlord and commercial work in Keyhaven
Letting agents often deal with us directly. Send the address, what’s needed and the access arrangements.
Landlords and agents in Keyhaven can book us as well as householders. Resealing between tenancies keeps a property looking cared for.
Keyhaven homes and the weather
Keyhaven is within about 1 mile of the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. Both are hard on glazing joints and frame seals, which can dry out and crack sooner where a building faces the weather. 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.
For landlords with property near Lymington Town station, glazing joints are worth checking at the end of a tenancy, before a small leak grows. Schools such as Milford-on-Sea Church of England Primary School are buildings too, and larger buildings have plenty of frames, and the mastic around each one ages.
Keyhaven is about 3 miles south of Lymington, in Hampshire. From the centre of Keyhaven to the outskirts, glazing silicone is available for homes and businesses alike, from flats and houses to offices and hotels. Our Hampshire coverage runs to 683 places, Keyhaven among them. Our Southampton page covers work nearby.
We work across SO41 for glazing silicone and the streets around it. We cover properties on New Road, Keyhaven Road and Saltgrass Lane. Nearby, we also carry out glazing silicone in Milford on Sea (1 mile west), Lymore (1 mile north-west), Lower Pennington (1 mile north-east), Everton (2 miles north-west) and Pennington (2 miles north). Further out, we also cover Totton (14 miles north), Hythe (12 miles north-east), New Milton (4 miles north-west), Ringwood (13 miles north-west), Warsash (15 miles north-east) and Barton on Sea (4 miles west).
What’s near Keyhaven
Around Keyhaven, our work takes us to homes and buildings near The Gun Public House and Priestlands School and the streets around them. Keyhaven’s nearest station is Lymington Town station, roughly 3 miles north-east. Other landmarks nearby include St Barbe Museum and Art Gallery (2.8 miles north-east) and Yarmouth Castle (3.3 miles east). The countryside around Keyhaven includes Milford on Sea LNR and Tennyson Down.
Towns and villages near Keyhaven
More services for Keyhaven
What sealant work cannot fix
Before you book, it’s worth knowing the limits too:
- Failed flashing around a conservatory
- Misting between the panes of a double-glazed unit (a failed unit for a glazier)
- Frames that have decayed or split
Not sure which it is? You can phone 0345 464 0079 or drop us an email and we’ll tell you honestly.
What we seal
- Glass-to-glass joints
- Shower screens
- Glass-to-frame joints
- Conservatory frames
- Rooflights
- Glass balustrade bases