Kent · England
Penshurst New Build Mastic
New build mastic for Penshurst, by sealant specialists with 20+ years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Second-fix sealing on new plots
- Sealant that never bonded to the surface
- Kitchen sealant that has pulled off the wall
New build mastic for homes and businesses in Penshurst
Dust is the enemy of new-build sealant. Each joint is cleaned of dust and primed where the product calls for it, so the sealant actually sticks rather than sitting on a layer of grit. If you have plot mastic for developers ahead of handover and smeared, uneven beads picked up at snagging, we can put it right.
Around Penshurst, older homes often have timber floors that move through the year, which is why skirting and threshold joints need a flexible sealant, not filler.
The work is covered for a year after we finish. If anything is not right with it, phone 0345 464 0079 or send us an email.
- Place
- Penshurst (TN11)
- Region
- Kent
- Cover
- A year, on every job
- Quote
- A clear quote up front
- Call
- 0345 464 0079
- Updated
- 26 October 2026
When it isn’t the sealant
To be straight with you, there are a few things sealant will not fix:
- Plumbing faults behind the sealant
- Cracked trays, tiles or worktops
- A tray or bath that is not properly supported, until it’s fixed
If in doubt, call 0345 464 0079 or drop us an email and we will say what we think.
What we seal
- Skirting & floors
- Windows & doors
- Plot handovers
- Bathrooms & en suites
- Kitchens
- Show homes
For landlords and businesses
Water getting past a failed joint can damage the building, which matters even more when someone else lives there. Resealing at the right time is simple maintenance that we can handle for you.
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.
Why deal with it now?
If you are still in the builder’s snagging or warranty period, ask them to put it right first. If it keeps failing or isn’t dealt with, we can reseal it properly. Where a wall is exposed, as many are in small places like Penshurst, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
Rather than a set price list, we price the job in front of us: the amount of work, the old material and the access. You will know the price before we begin.
Why choose Mr Mastic in Penshurst
- Old sealant always removed completely
- Experience in homes, commercial sites and hotels
- White, clear, grey or coloured to suit, where the product allows
- You choose the colour before work begins
FAQs for Penshurst
Will you come out to Penshurst?
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 cover Penshurst for new build mastic?
Yes. Our work covers London and the South East, and Penshurst 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 quote.
When is the sealant fully cured?
Many sealants skin over quickly but take longer to cure fully. We’ll tell you how long to leave the joint.
Do you take out the old sealant first?
Yes. We cut out all the old sealant and clean the joint before applying anything new.
Who should fix failed sealant in a new build?
Start with the builder if you are in the snagging or warranty period. Once that is done, or if they will not put it right, we will cut it out and reseal it.
What should I tell you?
Let us know what needs doing and where, plus photos if you have them. If we need more, we will ask.
Can you work on commercial sites?
Yes. We can plan bigger jobs in stages.
How long will you be here?
Typically it takes a few hours for most snagging lists, longer for a run of plots. Bigger jobs take longer, and we will tell you how long to expect.
New build mastic around Penshurst
Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
Around Penshurst, as everywhere, new build mastic is only as good as the preparation behind it. If you’ve bought a new home near Penshurst station, the sealant around baths, showers and frames is worth checking in the first year or two.
Penshurst is about 5 miles north-west of Royal Tunbridge Wells, in Kent. Homes, rented property, offices and hotels in Penshurst can book us for new build mastic, old or new, large or small. Every job comes with our one-year guarantee. Penshurst is one of 922 places in Kent where we work for new build mastic. There’s also a page for Crawley, roughly 16 miles from Penshurst.
Work in TN11 works the same way as everywhere else we cover. We cover properties on High Street, The Warren and Beckets Field and the roads around them. Neighbouring places we cover for new build mastic include Chiddingstone Hoath (2 miles west), Walter's Green (2 miles south), Chiddingstone Causeway (2 miles north), Fordcombe (2 miles south) and Teasley Mead (3 miles south-west). Within a short drive, we also cover Sevenoaks (8 miles north), Royal Tunbridge Wells (5 miles south-east), Tonbridge (5 miles north-east), Kings Hill (12 miles north-east), Paddock Wood (9 miles east) and Southborough (4 miles east).
Near you in Penshurst
Locally, jobs take us to homes and businesses close to Chiddingstone Castle Park and Gardens and The Leicester Arms Hotel and the streets around them. The nearest railway station is Penshurst station, roughly 1.8 miles north. Nearby you will also find Tonbridge Cottage Hospital (4.2 miles east) and Chiddingstone Castle (1.8 miles north-west). Green spaces nearby include Broadwater Warren RSPB Reserve and Barden Lake.
The process
When we arrive, we start by going over the job with you, so there are no surprises. Surfaces next to the work are protected before any work starts. Most jobs take a few hours in a single home. In a small place like Penshurst, access is generally the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- Each joint is checked for movement before work begins.
- Old sealant is cut out and the joints cleaned.
- We make sure the joints are dry and prime them if needed.
- New sealant goes in, with baths filled first so they’re at their heaviest.
- We check every joint and leave you with the cure times.
How to prepare
- Where the joints are inside, avoid wetting them before we arrive
- Mention any sign-in or site rules at work premises
- Mention if the joints have been sealed before
How to get a quote
We quote each job on its own, so the first step is telling us about yours. Just phone 0345 464 0079 or email us with the details.
Related advice
DIY sealant or a professional job?
Sealing over old silicone is the commonest DIY error. New silicone won’t bond to old, so it peels away and traps moisture behind it. All the old material has to come out first.
Some sealant jobs are within reach of a careful DIYer, like a short, easy-to-reach joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
Also near Penshurst
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What affects the quote in Penshurst
The quote reflects the job in front of us. We look at:
- Any working-time requirements on site
- Whether the work is at height
- Whether old sealant or filler has to be cut out
- The size of the job
The cost depends on the size of the job, how much old material has to come out and access to the work. You’ll have a clear quote before any work starts.
What to tell us for a quote
Photos help, but a description is a good start. Please mention:
- Any access issues, like height or stairs
- Where the property is
- If it’s domestic, commercial or a hotel
- Pictures of the joints, sent by email
We do not publish a price list, as no two jobs are quite the same. Instead, your job gets its own clear quote. To arrange one, ring 0345 464 0079 or email us.
Aftercare tips
Simple care keeps the joints in good condition. Our advice:
- Raise failed sealant with the developer while you’re covered
- Watch for new gaps as the house dries out
- Don’t wait for the house to settle if water is getting through
- Use the extractor fan every time you shower
Avoid standing on the rim of the bath or the edge of the tray while the sealant cures. Report any movement in a bath or tray.
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.