West Sussex · England
New-build mastic & snagging in Selsey, West Sussex
Specialist new build mastic for Selsey: careful preparation, the right product and tidy work. Ask us for a quick quote.
- Worktop and upstand sealant coming away
- Cracked caulk along new skirting
- Internal frame sealant that has split
Aftercare tips
Once the sealant has cured, a few habits help it last:
- Resist patching a failed seal with a tube from the DIY shop
- Report sealant problems to your builder during the snagging period
- Keep water off fresh sealant until it has cured
- Avoid scourers and strong chemicals on sealant
Leave the sealant for the cure time we give you before showering or bathing. Silicone is generally left for about a day.
Leave a failed new-build seal and water can reach the floor and the ceiling below. Catching it early keeps the fix to the sealant and the new finishes intact.
New build mastic for homes and businesses in Selsey
Building dust is behind a lot of failed new-build sealant. Each joint is cleaned of dust and primed where the product calls for it, so the new bead bonds properly instead of bonding to the dust. If you are dealing with gaps behind new kitchen upstands and joints pulling apart as timber shrinks, we can help.
Homes around Selsey move a little with the seasons, and skirting and floor joints show it first. Those joints need a flexible sealant, as rigid filler soon cracks out.
All of our work is guaranteed for twelve months, and the guarantee is the same wherever you are.
- Where
- Selsey (PO20)
- Region
- West Sussex
- Cover
- 12 months on all our work
- Price
- Quoted before any work starts
- Call
- 0345 464 0079
- Updated
- 26 October 2026
Questions from Selsey
Can you do new build mastic in Selsey?
Yes. We work across London and the South East, and Selsey is part of that. You can phone 0345 464 0079 or email us and tell us what needs doing, and we’ll give you a clear price.
Is there a guarantee on new build mastic in Selsey?
Every job comes with our one-year guarantee, wherever it is. We’re fully insured, and an ARBOMaster approved applicator.
How do I get a quote for new build mastic in Selsey?
There’s no set price, as it depends on the job: its size, the old material, access and the product needed. You’ll get a clear quote before work begins.
Do you remove the old sealant?
Yes, every time. New sealant will not bond properly to old, so any old material comes out before anything new goes in.
Do I need to be at home?
If the work is inside, we need someone to let us in. After that, you can carry on with your day.
Are you fully insured?
Yes. We are fully insured.
Who should fix failed sealant in a new build?
Start with the builder if you are in the snagging or warranty period. Once that’s done, or if they won’t put it right, we’ll cut it out and reseal it.
What do you put in the joint?
Each joint gets the product that suits it. Movement, water and weather all affect the choice.
DIY sealant or a professional job?
If you’ve already had a go yourself, that’s fine. We cut it out and start again.
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is, then guaranteed for a year.
Signs you need new build mastic in Selsey
Later trades and the final clean can damage fresh sealant. If it’s disturbed before curing, the joint can be left weak, and the problem shows up after you move in.
People normally contact us after spotting something like this:
- Internal frame sealant that has split
- Cracks appearing as a new home settles
- Beads laid onto grit and dust from the build
- Untidy sealant flagged on a snagging list
For jobs in and around Selsey, choosing the right material for each joint is as important as a tidy finish.
What your quote should include
- What product goes in the joint
- Whether they seal over old material or remove it
- Whether VAT is included
- How the colour is chosen
For landlords and businesses
We regularly work with letting and managing agents. Tell us the address, the job and how access works.
Businesses can book us for washrooms, kitchens, offices and more. For commercial premises, we can talk through working times when we quote.
What we do, step by step
Every visit runs the same way: we check the joints, protect the area around them, do the work and clear up. Most jobs take a few hours in a single home. In Selsey, parking is rarely complicated, though it helps to know about driveways or restrictions, and mention if the work is upstairs, in a flat or high on the outside.
- First, the list of joints is agreed from your snagging sheet or plot schedule.
- The failed sealant is removed completely down to clean surfaces.
- Joints are vacuumed and cleaned of building dust.
- 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.
Before we arrive
- On commercial sites, let us know about site rules
- Tell us about any previous sealing or DIY attempts
- Mention any tricky access
Ask for a quote
Call for a quick quote, or send an email if you’d rather. Tell us about the joints that need doing and we will explain what’s involved before giving you a price.
Advice
What new build mastic looks like in Selsey
Selsey is within about 1 mile of the coast. Plot mastic on new homes near the coast takes more weather than it would inland, so it’s worth checking at snagging. London and the South East are among the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
In and around Selsey, as anywhere, good new build mastic starts with a clean, dry, properly prepared joint.
Selsey is about 6 miles south-west of Bognor Regis, in West Sussex. We carry out new build mastic for homeowners, landlords and businesses in Selsey, as part of our work across West Sussex. Selsey is one of 371 places in West Sussex where we work for new build mastic. There’s also a page for Portsmouth, roughly 14 miles from Selsey.
Postcode districts we cover here for new build mastic: PO20. Local streets include Church Road, High Street and Ellis Square, and we cover them all. With the B2145 close by, Selsey is simple for us to get to for new build mastic. Nearby, we also carry out new build mastic in Church Norton (1 mile north-east), Keynor Estate (2 miles north), Sidlesham (3 miles north), Pagham (3 miles north-east) and Street End (4 miles north). Larger places within reach include Bognor Regis (6 miles north-east), Chichester (7 miles north), Littlehampton (12 miles north-east), Emsworth (10 miles north-west), Rustington (13 miles north-east) and Angmering (15 miles north-east). Selsey is among the bigger towns we cover in West Sussex.
Around Selsey
Locally, jobs take us to homes and businesses close to The Academy, The Fisherman's Joy Public House and The Academy and the streets around them. A little further out are Selsey Lifeboat Museum (0.5 miles south-east).
Towns and villages near Selsey
More services for Selsey
Honest limits
New sealant can’t fix everything, and we will tell you before any work starts. It won’t solve:
- Cracking that points to a structural problem
- Leaks from pipes, valves or wastes, which need a plumber
- Movement caused by a poorly fitted tray or bath
If you’re not sure, just ring 0345 464 0079 or drop us an email and we’ll give you a straight answer before you book.
What we seal
- Skirting & floors
- Bathrooms & en suites
- Windows & doors
- Show homes
- Plot handovers
- Kitchens
Why it’s worth doing now in Selsey
Small cosmetic gaps can wait for the house to settle, but a leaking seal can’t. If you’re unsure which you have, call 0345 464 0079 or send us an email with photos and we will tell you. In a family home in Selsey, a failed seal around a bath or a frame lets water into places you can’t see, such as under the floor, behind a panel or into a wall. Left alone, that means rot, damp and a bigger repair.
Combining jobs into one visit is generally more efficient than separate visits, so tell us about everything that needs sealing. We’ll give you a clear price for the lot.
Why choose Mr Mastic in Selsey
- Full insurance on every job
- More than 20 years in sealant work
- You choose the colour before work begins
- An ARBOMaster approved applicator
Read our cost guide or customer reviews.