Medway · England
New-build mastic & snagging in Rainham, Medway
We cover Rainham for plot mastic for developers and snagging failed sealant in new homes. Old sealant removed completely, joints prepared properly.
- Beads laid onto grit and dust from the build
- Kitchen sealant that has pulled off the wall
- Messy sealant that spoils new finishes
How we handle new build mastic in Rainham
Developers send us the plot schedule and we work through it. Bathrooms, en suites, kitchens, frames and skirting are sealed ready for handover using the right product for each joint. Typical jobs include kitchen sealant that has pulled off the wall and sealant that never bonded to the surface, across plot handovers, bathrooms & en suites and kitchens.
Homes around Rainham 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.
- Where
- Rainham (ME8, ME9)
- Wider area
- Medway
- Cover
- 12 months on all our work
- Quote
- A clear quote up front
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Signs you need new build mastic in Rainham
If plaster or screed was still damp when it was sealed, the bond suffers. Site programmes do not always leave time for joints to dry.
Common reasons people contact us are:
- New-build shower sealant that has already split
- Sealant that never bonded to the surface
- Worktop and upstand sealant coming away
- Sealant work across a run of new homes
For new homes near Rainham (Kent) station, it’s worth checking the sealant early, while snags are still fresh.
What to look for in a quote
- Which sealant they’ll use, and why
- What the quote includes, VAT included or not
- What insurance they hold
- Which colour the sealant will be
What happens if it’s left?
For developers, getting the sealant right first time saves return visits. Every return visit for a failed seal takes time. Black mould and gaps in sealant don’t fix themselves, and in a busy home in Rainham they get worse with every use. Replacing the sealant now is the simplest fix.
The cost reflects the work involved, not a rough estimate. That’s why we ask a few questions first.
Why book with us
- More than 20 years in sealant work
- Sanitary silicone with an anti-fungal additive in wet areas
- Rated 4.9 stars on Google
- Any old sealant cut out fully, not covered over
Take a look at our cost guide and our reviews.
FAQs for Rainham
Is Rainham in your area for new build mastic?
Yes, Rainham is within the area we cover. We work across London and the South East. Just call 0345 464 0079 or send us an email with a few details of the job.
Do you work for landlords with property near Rainham (Kent) station?
Yes, landlords and agents are among the people we work for. You can call 0345 464 0079 or send us an email with the details for a clear quote.
Is there a guarantee?
Yes. Each job is guaranteed for twelve months, wherever you are.
Are you an approved applicator?
Yes. We hold ARBOMaster approved applicator status.
Can you work on commercial sites?
Yes. Commercial and hotel work is a large part of what we do, as well as homes. Working times can be discussed when we quote.
Do you have insurance?
Yes. Mr Mastic is fully insured, and we have been doing sealant work for more than 20 years.
Why does sealant fail so quickly in new builds?
It’s common, and there are generally two reasons: the house moving as it dries, and sealant that never bonded properly. Cutting it out and resealing properly fixes both.
Will you just run a new bead over the existing one?
No. Sealing over old sealant looks fine for a few weeks, then lifts. We remove every bit of the old bead before resealing.
New build mastic around Rainham
Rainham is within about 3 miles 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, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
In and around Rainham, as anywhere, good new build mastic starts with a clean, dry, properly prepared joint.
Rainham is about 2 miles south-east of Gillingham, in Medway. We provide new build mastic to householders, landlords and businesses in Rainham and the surrounding area, as part of our work across Medway. We cover 68 towns and villages across Medway. There’s also a page for Chelmsford, roughly 27 miles from Rainham.
Work in ME8 and ME9 works the same way as everywhere else we cover. If you need new build mastic at a property on Durham Road, London Road and Bloors Lane or anywhere close by, we can help. We also cover the places around Rainham: Meresborough (1 mile south), Moor Street (1 mile east), Lower Rainham (1 mile north), Hartlip (2 miles south-east) and Lower Hartlip (2 miles south-east). Further out, we also cover Chatham (3 miles west), Rochester (5 miles north-west), Strood (6 miles west), Luton (3 miles west), Lordswood (3 miles south-west) and Hoo St Werburgh (5 miles north-west). Rainham is among the bigger towns we cover in Medway.
Landmarks near Rainham
Locally, jobs take us to homes and businesses close to Howard School, The Railway pub and Howard School and the streets around them. For rail, the closest station is Rainham (Kent) station, roughly 0.5 miles north of the centre. Other landmarks nearby include Medway Maritime Hospital (3.2 miles north-west) and Pentagon Shopping Centre (3.9 miles north-west). Not far away are Detling Hill and Bishop Saltings.
For landlords and businesses
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.
Mouldy or split sealant often shows up at the end of a tenancy, and it’s easy to sort out between tenants. Several properties can go on one quote.
Towns and villages near Rainham
Also in Rainham
What happens on the day
A visit follows a simple pattern: we check the joints, protect the area around them, carry out the job and clear up. It normally takes anything from a few hours to several days, depending on the number of plots. A visit in Rainham needs access to the work and a place to park close by. If the job is outside, mention gates, side access and anything above ground floor.
- 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
- Mention any tricky access
- For indoor joints, keep the area dry beforehand if you can
- For business premises, tell us about site rules or sign-in
How to get a quote
Asking for a quote is easy: tell us what needs doing and where. Photos by email help us understand the job, and we will take it from there.
Advice
Looking after it afterwards
Looking after new joints is easy:
- Use the extractor fan every time you shower
- Report sealant problems to your builder during the snagging period
- Look at the sealant regularly in the first couple of years
- Resist patching a failed seal with a tube from the DIY shop
Photograph failed sealant before it’s redone and keep the builder’s replies. It’s useful if you need to raise other issues later.
Early snagging is easier snagging. Left alone, a small crack can become a leak over time.
Different surfaces, different methods
Bathrooms and en suites
En suite showers are a common source of leaks into the room below. Resealing properly keeps water where it belongs.
Show homes
Show homes need sealant that looks right from day one. We lay neat, even beads in colours to suit the finishes.
When it is not the sealant
To be straight with you, some problems need a different trade:
- Structural cracks in walls or ceilings
- Leaks from pipes, valves or wastes, which need a plumber
- Deciding who is responsible under a builder’s warranty
Not sure which it is? You can ring 0345 464 0079 or send us an email and we’ll tell you honestly.
What we seal
- Kitchens
- Skirting & floors
- Plot handovers
- Show homes
- Bathrooms & en suites
- Windows & doors