Portsmouth · England
Hilsea New Build Mastic
New build mastic for Hilsea, by sealant specialists with 20+ years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Sealant that never bonded to the surface
- Gaps between new skirting and floors
- Plot mastic for developers ahead of handover
New build mastic in Hilsea, done properly
Our new-build work comes in two parts: plot mastic for developers, and putting right failed sealant for people who’ve bought a new home. Both get the same care over preparation, because that’s what rushed new-build sealant generally lacks. Common call-outs are for gaps opening as the house dries out and settles and smeared, uneven beads picked up at snagging, across skirting & floors, bathrooms & en suites and plot handovers.
For a new home in or near Hilsea, it’s worth checking the sealant early. Common snags include open skirting joints, lifting shower seals and gaps around frames.
Whatever the size of the job, it’s backed by our 12-month guarantee in Hilsea and across Portsmouth.
- Place
- Hilsea (PO2, PO3, PO6)
- Region
- Portsmouth
- Cover
- A year, on every job
- Price
- Quoted before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
DIY versus a professional finish
A DIY attempt does not rule out a professional job. We cut it out and start again, so just mention it when you contact us.
Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.
What we can’t put right
We’d rather tell you now than do work that will not last, so these are the limits:
- Baths and trays that move too much for sealant to cope with
- Structural cracks in walls or ceilings
- Your warranty claim itself, which is between you and the builder
Not sure which it is? You can ring 0345 464 0079 or drop us an email and we’ll tell you honestly before booking.
Joints and surfaces we work on
- Skirting & floors
- Show homes
- Bathrooms & en suites
- Windows & doors
- Kitchens
- Plot handovers
Other services in Hilsea
Landlords, agents and businesses in Hilsea
Housing providers, facilities teams and property managers book us too in Hilsea and across Portsmouth. Several sites can be quoted together, and we’re fully insured for the work.
We regularly work with letting and managing agents. Tell us the address, the job and how access works and we’ll quote.
What we are called out for in Hilsea
The first winter with the heating on dries a new home quickly. Skirting, frames and worktops pull away slightly.
People normally contact us after spotting one of these:
- Leaking shower tray seals in a new home
- Gaps opening as the house dries out and settles
- Plot mastic for developers ahead of handover
- Messy sealant that spoils new finishes
For new homes near Hilsea station, it’s worth checking the sealant early, while snags are still fresh.
Questions to ask before you book
- Is the old sealant removed completely?
- Which sealant they’ll use, and why
- When the joint can take water or movement
- Whether they’re fully insured
Why deal with it now?
Resealing everything on a snagging list in one visit is normally simpler than chasing joints one at a time. You get one visit and one clear quote to plan around. Homes in smaller places like Hilsea can face more weather, and failed outside joints let damp into walls. Indoors, a failed seal lets water into floors and panels as it would anywhere.
Instead of a standard rate, we look at what your job involves: how many joints, what’s in them now and how we reach them. The price is agreed before we begin.
What you get with us
- Full insurance on every job
- 20+ years of sealant experience
- ARBOMaster approved applicator
- Trusted Arbo and Everbuild sealants
Take a look at our cost guide and what customers say.
Questions from Hilsea
Can you help a landlord with a rental near Hilsea station?
Yes, rental work is part of what we do. Just phone 0345 464 0079 or send us an email and tell us about the property, and we’ll give you a clear price.
Is Hilsea in your area for new build mastic?
Yes. Our work covers London and the South East, and Hilsea is part of that. Just call 0345 464 0079 or send us an email with a few details of the job, and we’ll give you a clear price.
How long should I leave it?
Cure times vary by product. We tell you how long to leave it before we go.
Where do you work from?
We work from Crawley. Our applicators cover Hilsea, along with the rest of our area.
Will the old sealant be removed?
Yes, every time. New sealant won’t bond properly to old, so any old material comes out before anything new goes in.
Do you work through snagging lists?
Yes. We often work straight from a snagging list. We will go through the sealant items and agree what we will do.
How long does the job take?
That depends on how much there is to do, but as a guide it takes anything from a few hours to several days, depending on the number of plots. We will give you a better idea when we quote.
Do you have insurance?
Yes. Mr Mastic is fully insured.
What we do, step by step
On the day, there’s very little for you to do. Show us the job and we will take it from there. The job generally takes a few hours in a single home. A visit to Hilsea is planned like any other: the time, the access and where to park are agreed in advance. Outdoor jobs depend on a dry day, since sealant needs a dry surface.
- We look at why each joint failed, including any movement.
- We remove the failed sealant and clean the joints.
- Joints are dried and primed where the product calls for it.
- Baths are filled with water, then the new sealant is applied.
- We check every joint and leave you with the cure times.
Preparing for the visit
- Let us know if you’ve seen damp or leaks
- On commercial sites, let us know about site rules
- Keep children and pets away from the work area
How to get a quote
For a quote, call 0345 464 0079 or drop us an email and tell us where the job is and what the problem looks like. We’ll give you a clear price before any work starts.
Advice
What the job involves on each surface
Show homes
We seal show-home bathrooms, kitchens and frames ready for viewings. We’ll plan around viewing times.
Skirting and floors
Gaps under skirting are one of the most common new-build snags. We seal it with a flexible sealant that copes with the movement.
New build mastic in Hilsea: local notes
Hilsea is within about 1 mile of the coast. New homes near the sea put their outside mastic to work from day one, so it’s worth checking at snagging. 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.
Around Hilsea, as everywhere, new build mastic is only as good as the preparation behind it.
Hilsea is about 2 miles north of Portsmouth, in Portsmouth. If you need new build mastic in Hilsea, please ring 0345 464 0079 or send us an email for a quick quote. We cover Portsmouth from our Crawley base, Hilsea included. Our area takes in 19 places across Portsmouth.
We cover every part of PO2, PO3 and PO6 for new build mastic. Local streets include Vita Road, Conan Road and Arras Road, and we cover them all. We also cover the places around Hilsea: Cosham (1 mile north), North End (1 mile south-west), Tipner (1 mile south-west), Wymering (1 mile north) and Rudmore (1 mile south-west). Further out, we also cover Southsea (3 miles south), Portsea (3 miles south-west) and Portsmouth Point (3 miles south-west).
Landmarks near Hilsea
In Hilsea, that means homes and buildings near Alexandra Park, Trafalgar School and Coach and Horses pub, among other places. The nearest railway station is Hilsea station, roughly 0.5 miles east. Well-known places in the area include World War I Remembrance Centre (0.8 miles east) and Tricorn Centre (2.1 miles south-west). Open spaces near Hilsea include Milton Locks and Portsdown Hill.