Greater London · England
Remedial Sealant in Childs Hill
Professional remedial sealant in and around Childs Hill, with every bit of old sealant taken out first and a 12-month guarantee.
- Sealant applied over old sealant that has lifted
- Floor or wall movement joints that have failed
- Wide, uneven beads that look worse than the old ones
The process
We work through the job in order: protect, prepare, seal, tidy. For most jobs that takes a few hours, depending on how many layers have to come out, and the area is left clean. For a job in Childs Hill, parking and access are the things to plan: let us know about parking, the floor we will be working on and any lift or shared entrance.
- We protect the surfaces around the joint.
- The botched or failed sealant is cut away completely.
- The joint is degreased and checked for movement and leaks.
- Once dry, a suitable sealant is applied and tooled.
- We give you the cure time and explain what caused the failure.
Getting ready for the visit
- Mention any leaks or damp you’ve noticed
- On commercial sites, let us know about site rules
- Try not to wet indoor joints just before the visit
Ask for a quote
Want a quote for remedial sealant? Please call 0345 464 0079 or send us an email and tell us about the job. You’ll know what we plan to do, and what it will cost, before any work begins.
Related advice
About our remedial sealant in Childs Hill
Movement and expansion joints fail when the sealant can’t stretch. The old sealant comes out and backing goes in to control the depth, before resealing with a flexible product suited to the movement. If you are dealing with a second bead peeling off the first and leaks that keep coming back after resealing, we can help, whatever the surface.
In much of London, period terraces have been converted into flats over the years, and bathrooms were often squeezed into small rooms. A compact bathroom that steams up every day is hard on silicone and grout.
A 12-month guarantee comes as standard, so you are covered after we have gone.
- Where
- Childs Hill (NW2, NW3, NW11)
- Wider area
- Greater London
- Guarantee
- One year on every job
- Price
- A clear quote up front
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
How to look after the new joints
Once the sealant has cured, a few habits help it last:
- Ask why a joint failed before redoing it
- Keep the room well ventilated
- Never seal over old silicone
- Keep bleach and abrasives off the bead
If the joint ever needs renewing, have it cut out, not sealed over. Over-sealing is how many remedial jobs start, so the old bead should always come out first.
A split movement joint lets rain into walls and floors, and the longer it’s left, the more the joint edges break down. A joint with sound edges is far easier to reseal.
Towns and villages near Childs Hill
Also in Childs Hill
FAQs for Childs Hill
Is parking a problem for a job in Childs Hill?
London parking needs a little planning, so let us know about permits, bays or a driveway when you book. That way the visit can be planned around it.
Can worn sealant in a flat in Childs Hill cause a leak downstairs?
Yes, and the first sign is often a stain on the ceiling below. A proper reseal before the leak starts is the easy fix.
Are you fully insured?
Yes. Full insurance covers our work, and we can confirm the details when we quote.
What if the leak is not the sealant?
That is why we look for the cause first. If we find the leak is elsewhere, we tell you before going further.
Can I add another job to the visit?
Yes. Tell us about everything you’d like done.
Can tenants book the work?
We’re happy to deal with the tenant, landlord or agent. Get your landlord’s agreement first.
Where is Mr Mastic based?
Our base is in Crawley, and we cover South East England, London and all of Scotland.
Is remedial work guaranteed?
Yes. You get our 12-month guarantee, and we are ARBOMaster approved.
Remedial sealant around Childs Hill
There are hotels and other places to stay in and around Childs Hill. Hotel bathrooms are part of our work as well as homes, and can be done room by room. London has a lot of flats and conversions, and a failed shower or bath seal in one can show up on the ceiling below, so tired sealant is best dealt with early.
Rented homes near Cricklewood station change hands often, and a joint that keeps failing is best fixed properly while the property is empty. In the older streets around All Saints, walls and floors in older homes can move, and sealant and grout show it first.
Childs Hill is about 1 mile north-west of West Hampstead, in Greater London. Across the NW2 area, our applicators can take on remedial sealant. Childs Hill is one of 764 towns and villages in Greater London we cover. You can also see our page for London, roughly 6 miles from Childs Hill.
We cover every part of the NW2, NW3 and NW11 postcode area for remedial sealant and the streets around it. You will find streets such as Nant Road, Ridge Road and Garth Road, and we cover them all. We also cover the places around Childs Hill: Fortune Green (1 mile south), West Hampstead (1 mile south-east), Golders Green (1 mile north), North End (1 mile north-east) and Vale of Health (1 mile east). Larger places within reach include London (6 miles south-east), City of Westminster (4 miles south-east), Marylebone (4 miles south-east), Kensington (4 miles south), St Pancras (4 miles south-east) and Shoreditch (6 miles south-east).
Around Childs Hill
Around Childs Hill, our work takes us to homes and buildings near St Vedasts School For Boys, Hampstead School and The Old Bull and Bush pub, among other places. The nearest railway station is Cricklewood station, about 0.7 miles south-west of the centre. Nearby you’ll also find O2 Centre (1.2 miles south-east) and New End Hospital (0.9 miles east). For a walk, there’s Parliament Hill and Westbere Copse.
Should I try it myself first?
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is.
A careful DIYer can reseal a simple joint, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
What we’re called out for in Childs Hill
Some joints fail because water is reaching them from behind. A slow leak behind the tiles soaks the joint from the back, and the sealant lifts or goes mouldy from underneath.
Common reasons people contact us are:
- Movement joints that have split or pulled away
- Black mould underneath the bead
- Smears and lumps from a botched reseal
- Leaks that keep coming back after resealing
Childs Hill is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book.
Before you book anyone
- How much experience the applicator has
- What product goes in the joint
- What insurance they hold
- Is VAT in the price?
How the job changes by surface
Worktops & kitchens
Kitchen joints hold grease and residue, so cleaning takes longer than in a bathroom before resealing.
Mouldy bath & shower sealant
Repeat mould usually points to a damp, poorly aired room. Along with resealing, we will mention if the room needs better ventilation.
Why it’s worth doing now in Childs Hill
Spraying mould remover on a sealed-over joint does not reach what’s underneath. The layers have to come out, and the joint treated and dried before resealing. In older London homes, water behind a failed joint soaks into brick and timber without much sign, and by the time it shows on a wall or ceiling in Childs Hill, the repair is bigger than the sealant job would have been.
There are no prices on our website, because each job is priced on what it involves. Call for a quick quote and we will talk you through it.
What you get with us
- Tidy, careful work
- Trusted Arbo and Everbuild sealants
- Domestic, commercial and hotel work
- Rated 4.9 stars on Google
Read what affects the cost and our reviews.
How we quote for remedial sealant
There’s no set price list, because jobs vary so much. What we look at:
- How many rooms, windows or areas are involved
- The product the joint needs
- Whether old sealant or filler has to be cut out
- The amount of work
Homes and businesses are quoted the same way: the amount of work, the access and the products needed, plus any working-time requirements on site. Call for a quick quote and we will explain what it covers.
What we need to know
Photos by email are helpful but not essential. Please mention:
- What’s wrong with the joints now
- The type of property
- The address or postcode of the job
- Pictures of the joints, sent by email
Asking for a quote is easy: let us know what needs doing and where. A few pictures by email make the job easier to understand, and we’ll take it from there.