Hampshire · England
Lyndhurst New Build Mastic
Plot mastic for developers and snagging failed sealant in new homes for homes and businesses in Lyndhurst and across Hampshire. ARBOMaster approved applicators, fully insured, with a one-year guarantee.
- Sealant work across a run of new homes
- Beads laid onto grit and dust from the build
- Shower seals failing in the first year or two
New build mastic in Lyndhurst, done properly
Some owners wait for the first year’s movement before having joints redone. For small cosmetic gaps, that’s reasonable, but a seal that is letting water through needs doing now. If you are dealing with joints pulling apart as timber shrinks and skirting joints opening in the first winter, we can put it right.
In and around Lyndhurst, floors range from older timber boards to tiles and newer finishes, each moving in its own way. The sealant at skirtings and thresholds has to suit the floor it meets.
Our work is backed for twelve months, and the guarantee is the same wherever you are.
- Place
- Lyndhurst (SO43)
- Region
- Hampshire
- Cover
- A year, on every job
- Quotes
- A clear price before we start
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Lyndhurst questions
I let a flat near Ashurst New Forest station. Can you help?
Yes, landlords and agents are among the people we work for, and several properties can be quoted together. You can call 0345 464 0079 or drop us an email with the details for a clear quote.
Do you cover smaller places like Lyndhurst?
Yes, Lyndhurst is covered. We work across London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
Do you take out the old sealant first?
Yes, always, and completely. New sealant won’t bond properly to old, so any old material comes out before anything new goes in.
My new home is still under warranty. Should I contact you?
Start with your builder while their snagging or warranty period runs. If that doesn’t work out, we’re happy to quote with our 12-month guarantee.
Are you ARBOMaster approved?
Yes. We are approved under the ARBOMaster scheme.
Do you work for developers?
Yes. We work through plots to your schedule, room by room. Tell us the plots and the joints involved and we’ll quote.
Will you leave a mess?
Not at all. We work neatly, protect the area around the joints and tidy up afterwards.
Do the sealants smell?
There can be a smell while the sealant cures, which fades as it sets. Ventilation helps.
Towns and villages near Lyndhurst
Also in Lyndhurst
Can I do it myself?
Sealing over old silicone is the commonest DIY error. Silicone doesn’t stick to old silicone, so it peels away and traps moisture behind it. All the old material has to come out first.
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs need the right product, the right access and the right method.
What sealant work cannot fix
It helps to know what we can’t do:
- Structural cracks in walls or ceilings
- Disputes or warranty claims with your builder
- Damaged fittings that need replacing
Not sure which it is? You can call 0345 464 0079 or drop us an email and we will tell you honestly before you book.
Joints and surfaces we work on
- Windows & doors
- Plot handovers
- Kitchens
- Skirting & floors
- Bathrooms & en suites
- Show homes
Work for landlords, hotels and businesses
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 that we can handle for you.
If you manage several properties in or around Lyndhurst, jobs at different addresses can be quoted together. Just tell us the addresses and what each one needs.
How to look after the new joints
Once the sealant has cured, a few habits help it last:
- Look at the sealant regularly in the first couple of years
- Resist patching a failed seal with a tube from the DIY shop
- Wait for the cure time before using a resealed shower
- Open a window or run the fan after bathing
Wipe the sealant with warm soapy water. Keep scourers and harsh chemicals off it as they wear the bead.
A failed seal in a new home lets water into joists, plasterboard and ceilings. Early resealing keeps the job small.
What new build mastic looks like in Lyndhurst
The South East is one of the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Around Lyndhurst, as everywhere, new build mastic is only as good as the preparation behind it. If you’ve bought a new home near Ashurst New Forest station, the sealant around baths, showers and frames is worth checking in the first year or two.
Lyndhurst is about 4 miles south-west of Totton, in Hampshire. Across the SO43 area, our applicators can take on new build mastic. Our area takes in 683 places across Hampshire, large and small. There’s also a page for Southampton, about 9 miles away.
Our applicators cover all of the SO43 postcode area for new build mastic and the streets around it. That includes homes and businesses on High Street, King's Close and Empress Road and the roads around them. Nearby, we also carry out new build mastic in Emery Down (1 mile west), Ashurst (3 miles north-east), Balmerlawn (3 miles south), Colbury (4 miles north-east) and Brockenhurst (4 miles south). Larger places within reach include Eastleigh (12 miles north-east), Totton (4 miles north-east), Chandler's Ford (11 miles north-east), Hedge End (12 miles east), Lymington (8 miles south) and Romsey (9 miles north-east).
Around Lyndhurst
We work in homes and buildings around Fox And Hounds Public House and the streets around them. The nearest railway station is Ashurst New Forest station, about 2.4 miles north-east of the centre. Other landmarks nearby include Ashurst Hospital (2.6 miles north-east) and National Dairy Museum (3.4 miles north-east). Green spaces nearby include Copythorne Common.
Why deal with it now?
The builder is generally the first port of call while the snagging or warranty period runs. If it keeps failing or isn’t dealt with, we can reseal it properly. Around Lyndhurst, water from a failed joint in an older home can soak into timber and plaster, and that’s a much bigger job than renewing the sealant.
Combining jobs into one visit is normally more efficient than separate visits, so it’s worth mentioning everything you’d like done. You will get one clear quote for the whole job.
Why choose Mr Mastic in Lyndhurst
- Any old sealant cut out fully, not covered over
- Sealant colour chosen to suit
- You choose the colour before work begins
- ARBOMaster approved applicator
See what affects the cost and what customers say.
How we quote for new build mastic
Your quote is based on your job. We look at:
- Whether there’s mould to deal with
- Which sealant suits the joint
- The number of rooms or windows
- Working hours on commercial sites
Leaving a failed joint generally makes the job bigger, not smaller, because water and mould keep working on it. If you’re unsure, phone 0345 464 0079 or send us an email and we’ll give you an honest view and a quote.
What we need to know
Before you ask for a quote, have a think about:
- Whether it’s a home or a business
- If someone has resealed it before
- What the problem is, such as mould, gaps, leaks or cracking
- Roughly how big the job is
If you are in Lyndhurst and need new build mastic, phone 0345 464 0079 or send us an email. A short description of the job and where it is helps us quote, and we will agree the price before any work begins.
How the visit works
A visit follows a simple pattern: we check the joints, protect the area around them, carry out the job and clear up. Most jobs take anything from a few hours to several days, depending on the number of plots. A visit to Lyndhurst is planned like any other: the time, the access and where to park are agreed in advance. If the work is outside, the weather plays a part, as sealant needs a dry surface.
- We look at why each joint failed, including any movement.
- Old sealant is cut out and the joints cleaned.
- 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
- For business premises, tell us about site rules or sign-in
- Mention if the joints have been sealed before
- Mention any parking rules near the property
Ask for a quote
For a quote, ring 0345 464 0079 or email us with the location and a short description of the problem. We’ll give you a clear price before any work starts.