Greater London · England
Glazing & conservatory sealant in Harold Hill, Greater London
Glazing silicone in Harold Hill from a team with over 20 years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- New silicone smeared over old sealant
- Failed sealant around rooflight glass
- Mouldy sealant around glass panels
Different surfaces, different methods
Shower screens
A screen’s wall joint and tray joint are where leaks start. Both are resealed with anti-fungal silicone.
Glass balustrade bases
Glass balustrades sit in a channel that’s often finished with sealant. Failed sealant there lets water collect.
Glazing silicone in Harold Hill
Frameless shower screens rely on sealant to keep water in. The joint down the wall and the one along the tray are common leak points and both get fresh anti-fungal silicone. We work on rooflights, shower screens and conservatory frames, and the jobs we see most are glass-to-glass joints that have split and water tracking down the inner face of the glass. As specialist sealant applicators, we take on glazing silicone and every other kind of sealant job in Harold Hill.
London homes have every kind of window, from timber sashes in period terraces to aluminium and uPVC in newer blocks. Over the years, the sealant around them shrinks, cracks and pulls away, letting in draughts and water.
Each job carries a 12-month guarantee.
- Location
- Harold Hill (RM3)
- Wider area
- Greater London
- Cover
- One year on every job
- Price
- A clear price before we start
- Call
- 07833 053749
- Page updated
- 26 October 2026
Frames and glazing around Harold Hill
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. In a converted house or block, who looks after the windows depends on the lease, so check that before booking.
If you look after a building such as Drapers' Pyrgo Priory School, the mastic around its windows and doors needs looking after like any other building’s. Homes close to St Paul include some older properties, and frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Harold Hill is about 3 miles north-east of Romford, in Greater London. Every kind of property in Harold Hill can book us for glazing silicone, old or new, large or small. Every job comes with our one-year guarantee. Harold Hill is one of 786 places in Greater London where we work.
Work in RM3 is quoted and booked the same way as anywhere else. If you need glazing silicone at a property on Oxford Road, Priory Road and Wigton Road or anywhere close by, we can help. We also cover Noak Hill (1 mile north), Harold Park (1 mile south-east), St Vincent's Hamlet (1 mile north), Brook Street (2 miles east) and South Weald (2 miles north-east). Further out, we also cover Shoreditch (15 miles south-west), Walthamstow (11 miles west), Hoxton (15 miles west), Whitechapel (14 miles south-west), Highbury (15 miles west) and Plaistow (11 miles south-west).
What’s near Harold Hill
Locally, jobs take us to homes and businesses close to Dagnam Park, The Morris Dancer Public House and King's Wood School, among other places. The nearest railway station is Harold Wood station, about 1.2 miles south. A little further out are The Mercury Mall (2.9 miles south-west) and Harold Wood Hospital (1.2 miles south). The countryside around Harold Hill includes Bedfords Park.
Questions from Harold Hill
Do you cover Harold Hill for glazing silicone?
Yes, Harold Hill is within the area we cover. We work across London and the South East. Just phone 07833 053749 or email us with a few details of the job.
Can you help a landlord with a rental near Harold Wood station?
Yes, we work for landlords and agents. Just ring 07833 053749 or email us and tell us about the property, and we will give you a clear price.
How do I get a quote for glazing silicone in Harold Hill?
We do not publish prices, because the cost depends on the job: how much there is, what’s there now, how we reach it and what it needs. We agree the price before any work begins.
Can you match the sealant colour?
Most of the time, yes. We will tell you which colours the right product comes in and agree one before any work starts.
Why not top up the existing silicone?
A top-up rarely holds. Fresh silicone will not bond to cured silicone so we take it all out and start clean.
Do you fit new glass or sealed units?
That is not something we do. A misted unit has failed inside and needs replacing by a glazier.
Do you guarantee glazing sealant work?
Our 12-month guarantee applies to every job we do.
Is balustrade sealant something you do?
Yes, where the base is finished with sealant. Send us photos and we’ll take a look when you ring 07833 053749 or email us.
DIY sealant or a professional job?
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and doesn’t move well, and getting the depth right matters as much as the look.
Sealing over old silicone is the commonest DIY error. Silicone does not stick to old silicone, so it peels away and traps moisture behind it. Everything old must be removed first.
When it isn’t the sealant
Some problems need a builder, plumber or other trade rather than us:
- Glass that needs replacing
- A sagging or failing conservatory roof
- Failed flashing around a conservatory
Not sure which it is? You can ring 07833 053749 or send us an email and we’ll tell you honestly.
Surfaces we seal
- Glass-to-frame joints
- Glass-to-glass joints
- Glass balustrade bases
- Conservatory frames
- Shower screens
- Rooflights
Why it’s worth doing now in Harold Hill
Dealing with a leaking shower screen early protects the floor and ceiling. Water from a failed joint can soak into the floor before you notice. Converted houses in London often have a bathroom above someone else’s living room, so a small leak from tired sealant can mean a neighbour’s ceiling and a lot of disruption. Putting it right early is much less trouble for homes in Harold Hill.
Rather than a set price list, we price the job in front of us: the amount of work, the old material and the access. The price is agreed before we begin.
Why choose Mr Mastic in Harold Hill
- You choose the colour before work begins
- White, clear, grey or coloured to suit, where the product allows
- An ARBOMaster approved applicator
- Sealant colour chosen to suit
Read what affects the cost or our reviews.
How the visit works
Before we leave, we go over the finished joints with you. The work normally takes a few hours, depending on how many joints need doing, depending on the size of the job. In Harold Hill, as in most of London, parking needs a little planning. It helps if you can point us to a visitor permit or a bay close to the door.
- First, we check where the water gets in.
- We remove the old sealant carefully.
- We clean the glass and frame so the new silicone bonds.
- We lay the new bead and tool it smooth.
- Each joint is checked and, where possible, water-tested.
How to prepare
- Keep pets and children clear of the area while we work
- Let us know about parking restrictions
- Where the joints are inside, avoid wetting them before we arrive
How to get a quote
For a quick quote, get us on the phone, or send an email if you’d rather. Describe what needs sealing and we’ll explain what’s involved and give you a clear price.
Advice
Do you need glazing silicone in Harold Hill?
On shower screens, constant water and cleaning products wear silicone. Mould gets into it and the joint starts to lift.
Any of these means the joints need attention:
- A quick top-up bead that didn’t last
- Rooflight joints letting water in
- Water escaping where a screen meets the wall
- Drips on the inside of a conservatory window
Letting a property close to Harold Wood station? Then leaking glazing joints, shower screens or conservatory seals are worth sorting between tenancies.
Questions to ask before you book
- Whether they seal over old material or remove it
- What the quote includes, VAT included or not
- What happens if they find a problem under the old sealant
- Who turns up on the day
Towns and villages near Harold Hill
Also in Harold Hill
For landlords and businesses
Businesses can book us for washrooms, kitchens, offices and more. On commercial sites, working times can be discussed when we quote.
From a single let to a portfolio, the work is the same standard: old sealant fully removed, joints prepared properly and a 12-month guarantee.