Kent · England
New-build mastic & snagging in Wilmington, Kent
Plot mastic for developers and snagging failed sealant in new homes for homeowners, landlords and businesses in Wilmington. ARBOMaster approved applicators, fully insured, with a one-year guarantee.
- Messy sealant that spoils new finishes
- Gaps opening as the house dries out and settles
- Sealant work across a run of new homes
About our new build mastic in Wilmington
We never seal over a failed new-build bead. Fresh silicone cannot bond to the old layer, so the joint is cut out, cleaned, dried and resealed. If you have internal frame sealant that has split and skirting joints opening in the first winter, we can help, on show homes, skirting & floors and kitchens alike.
Older homes in small places like Wilmington often have timber floors that move with the seasons, which is why skirting and threshold joints need a flexible sealant, not filler.
We stand behind the work with a 12-month guarantee, so you are not left on your own once the job is done.
- Location
- Wilmington (DA2, DA5, DA1)
- Wider area
- Kent
- Guarantee
- One year on every job
- Quote
- Quoted before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Honest limits
To be straight with you, some problems need a different trade:
- Broken tiles or a split tray
- Leaking fittings rather than failed sealant
- Cracking that points to a structural problem
If in doubt, call 0345 464 0079 or drop us an email and we will say what we think.
Joints and surfaces we work on
- Bathrooms & en suites
- Windows & doors
- Kitchens
- Show homes
- Skirting & floors
- Plot handovers
DIY versus a professional finish
If you’re 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 doesn’t work out, we can still put it right.
The biggest DIY mistake is sealing over old sealant. New silicone will not bond to old, so it lifts and traps water and mould underneath. All the old material has to come out first.
Questions from Wilmington
Will you come out to Wilmington?
Yes, smaller places are covered as well as towns. We work across London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Do you work for landlords with property near Crayford station?
Yes. We work for letting agents and landlords as well as householders, and several properties can be quoted together. Just ring 0345 464 0079 or send us an email with the address and what needs doing, and we’ll send you a clear quote.
What do you need from me for a quote?
A short description and the location, with pictures by email if possible. If we need more, we’ll ask.
Will the old sealant be removed?
Yes, always, and completely. New silicone doesn’t stick to old silicone, so any old material comes out before anything new goes in.
How long does new build mastic take?
Most jobs take a few hours for most snagging lists, longer for a run of plots. Your quote will say how long we expect yours to take.
Is it worth trying it myself?
Sometimes. The key is preparation: remove all the old material and work on a clean, dry joint. We can always put it right if it fails.
Do you take on second-fix sealing for builders?
Yes. We take on second-fix sealant work across new plots. We clean and prime joints properly to keep callbacks down.
Can you do several jobs on one visit?
Yes, we can. Several rooms, windows or areas can go on one quote.
Towns and villages near Wilmington
More services for Wilmington
Different surfaces, different methods
Skirting and floors
Wet-area floor joints need a flexible seal. They get a flexible, water-resistant sealant.
Windows and doors
On new builds, external frame sealant can be patchy. We reseal it with a weatherproof, flexible sealant.
What affects the cost of new build mastic
The price is agreed before any work begins. It’s based on:
- How many rooms, windows or areas are involved
- Any mould that needs treating
- The old material and how stubborn it is
- The product the joint needs
Doing several joints on one visit is usually more efficient than separate visits, so it’s worth mentioning everything you’d like done. You’ll get one clear quote for the whole job.
What to tell us for a quote
To make quoting easier, please include:
- Where the job is, and your postcode
- Pictures of the joints, sent by email
- Roughly how big the job is
- Any access issues, like height or stairs
For new build mastic in Wilmington, ring 0345 464 0079 or drop us an email. A short description of the job and where it is helps us quote, and we’ll agree the price before any work begins.
Landlord and commercial work in Wilmington
Whether it’s one flat or a portfolio, the work is the same standard: the old material taken out, careful preparation and a 12-month guarantee.
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Resealing at the right time is simple maintenance.
What happens on the day
All our tools and materials come with us in the van, so there’s nothing for you to buy. After a quick look at the joints together, the area is protected and the work begins. It normally takes a few hours in a single home. Somewhere as small as Wilmington, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We start by going through the snagging items or plot schedule with you.
- The failed sealant is removed completely down to clean surfaces.
- We clean out the dust and grit left from the build.
- Primer goes on where the surface and product need it, then the new sealant.
- We tool every joint neatly and tell you when each area can be used.
Getting ready for the visit
- Let us know about earlier repairs to the joints
- Tell us about any water getting in
- For indoor joints, keep the area dry beforehand if you can
Ask for a quote
Every job is quoted individually, so start by telling us what you need. Simply ring 0345 464 0079 or email us and describe the job and send photos if you have them.
Advice
New build mastic in Wilmington: local notes
The South East is one of the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
For new homes near Crayford station, it’s worth checking the sealant early, while snags are still fresh. In and around Wilmington, as anywhere, good new build mastic starts with a clean, dry, properly prepared joint.
Wilmington is about 2 miles south-west of Dartford, in Kent. Every kind of property in Wilmington is covered for new build mastic. Every job comes with our 12-month guarantee. We cover 922 towns and villages across Kent, large and small. London is on our list too, about 13 miles from Wilmington.
Jobs for new build mastic in DA2, DA5 and DA1 is quoted and booked the same way as anywhere else. Whether your property is on Common Lane, Parsons Lane and Oakfield Lane or a nearby road, our applicators can take on the job. Wilmington is on the A2, so it’s easy for us to get to. Neighbouring places we cover for new build mastic include Bowmans (1 mile north), Joyden's Wood (1 mile west), Puddledock (1 mile south-west), Coldblow (1 mile north-west) and Crayford (1 mile north). Further out, we also cover Sevenoaks (10 miles south), Gravesend (8 miles east), Northfleet (7 miles east), Kings Hill (14 miles south-east), Swanscombe (5 miles east) and Windmill Hill (8 miles east).
Landmarks near Wilmington
Locally, jobs take us to homes and businesses close to Dartford Heath, The Plough pub and Wilmington Primary School, among other places. For rail, the closest station is Crayford station, roughly 1.3 miles north of the centre. Other landmarks nearby include Stone Castle (4 miles east) and West Hill Hospital (1.4 miles north-east). Not far away are Wansunt Pit.
Aftercare tips
Once the sealant has cured, a few habits help it last:
- Put sealant faults on your snagging list early
- Don’t wait for the house to settle if water is getting through
- Watch for new gaps as the house dries out
- Record problems with dated photos
Follow the cure time we give you before the area gets wet. Most silicones need around a day.
If a shower tray or bath seal splits in the first year, look for movement. Have it resealed, and the tray or bath checked, before it gets worse.