Hertfordshire · England
Whempstead Remedial Sealant
Professional remedial sealant in and around Whempstead, with old sealant always removed completely and a 12-month guarantee.
- A shower that leaks however often it’s resealed
- Sealant applied over old sealant that has lifted
- Worktop sealant that has shrunk and split
Remedial sealant in Whempstead, done properly
Remedial jobs in Whempstead normally fall into a few patterns: sealant over sealant, mould under the bead, leaks that come back and movement joints that have split. We strip each one back and start from scratch. We work on leaking tray & enclosure joints, failed movement joints and expansion joints, and common reasons people get in touch are caulk or the wrong sealant used in a wet area and movement joints that have split or pulled away.
In a village or hamlet like Whempstead, homes are often older cottages and farmhouses alongside a few newer houses. Movement in older walls and floors tends to show first as cracked grout or split sealant.
A one-year guarantee comes as standard, so you are covered after we have gone.
- Where
- Whempstead (SG12)
- Wider area
- Hertfordshire
- Guarantee
- One year on every job
- Quote
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
What sealant work can’t fix
Some problems need a builder, plumber or other trade rather than us:
- A leaking trap, valve or supply pipe
- Old mastic in a building from before 2000 that should be checked for asbestos before it’s disturbed
- A bath, tray or worktop that moves until it’s properly fixed
Not sure which it is? You can call 0345 464 0079 or email us and we will tell you honestly.
Joints and surfaces we work on
- Mouldy bath & shower sealant
- Leaking tray & enclosure joints
- Failed movement joints
- Expansion joints
- Shrunken worktop sealant
- Botched or over-sealed joints
The process
Before we leave, we go over the finished joints with you and tell you how long to leave it. The visit itself normally takes a few hours, depending on how many layers have to come out, depending on the size of the job. Somewhere like Whempstead needs a little journey planning: tell us about narrow lanes, gates, long drives and where we can park. Everything for the job comes with us, so a second trip is avoided where possible.
- Surrounding tiles, trays and frames are protected first.
- The botched or failed sealant is cut away completely.
- We clean and degrease the joint and look for signs of movement or water.
- Once dry, a suitable sealant is applied and tooled.
- You get the cure time and our view on why the joint failed.
How to prepare
- Mention any sign-in or site rules at work premises
- Let us know about parking restrictions
- Clear the area around the work
Getting a quote
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints, and email photos if that is easy.
Advice
Can I do it myself?
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and does not move well, and the joint depth matters as much as the finish.
If you are set on DIY, put the effort into preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it does not work out, we can still put it right.
Whempstead homes and their sealant
Hard water is the norm across most of the South East, which leaves limescale on sealant, grout and fittings, and it has to be cleaned off before new sealant goes in.
Homes close to Parish Church of All Saints include some older properties, and walls and floors in older homes can move, and sealant and grout show it first. If you let a flat or house near Watton-At-Stone station, failed or mouldy sealant is worth putting right between tenancies, before it turns into a leak. Managing a site like Munden Church of England Voluntary Controlled Primary School? Then we reseal washrooms and kitchens in schools and businesses as well as homes.
Whempstead is about 5 miles south-east of Stevenage, in Hertfordshire. Jobs in Whempstead get the same care as everywhere else we work: the old material taken out, joints prepared properly and a 12-month guarantee. Whempstead is one of 381 places in Hertfordshire where we work. There’s also a page for London, roughly 26 miles from Whempstead.
Postcode districts we cover here for remedial sealant: SG12. Remedial sealant is available to properties on Whempstead Road and Mill Lane. Other places close to Whempstead include Dane End (1 mile east), Burn's Green (1 mile north-west), Sacombe (1 mile south-east), Haultwick (2 miles north-east) and Sacombe Green (2 miles south-east). Within a short drive, we also cover Stevenage (5 miles north-west), St Albans (13 miles south-west), Bishop's Stortford (10 miles east), Welwyn Garden City (7 miles south-west), Harpenden (12 miles west) and Hitchin (9 miles north-west).
Near you in Whempstead
For rail, the closest station is Watton-At-Stone station, roughly 1.8 miles south-west. Other landmarks nearby include Hertford County Hospital (5.4 miles south) and Benington Castle (2 miles north-west). Not far away are Astonbury Wood.
Keeping the joints in good condition
How long the joints last depends on use and care. We suggest:
- Find out why the sealant failed first
- Check trays and worktops don’t move
- Never fill a movement joint with mortar or grout
- Deal with small splits early
If we’ve found a cause, such as a loose tray or a leaking waste, get it fixed, or the new joint may fail again.
Mould under a second layer of sealant keeps growing out of sight. By the time it shows through, the joint is well past saving.
Landlords, agents and businesses in Whempstead
Hotels need rooms back in use, so we plan the work room by room around your bookings where we can. We have worked in hotels as well as homes and businesses.
Failed sealant is one of the commonest items on a check-out report. Several properties can be quoted together.
Why it’s worth doing now in Whempstead
Adding more sealant is the usual quick fix, and it rarely works. It does not grip the old layer, so the leak carries on and there’s now more to remove. Older cottages and farmhouses around Whempstead can have timber floors and frames, where water from a failed joint can cause rot if it’s left.
A failed joint rarely gets cheaper to fix by waiting, because water and mould keep working on it. If you are not sure whether it needs doing, call 0345 464 0079 or send us an email and we’ll give you an honest view and a quote.
Why choose Mr Mastic in Whempstead
- Fully insured
- Colour picked to suit the job
- Trusted Arbo and Everbuild sealants
- ARBOMaster approved applicator
See our cost guide or our reviews.
What affects the cost of remedial sealant
Call for a quick quote. The main things that affect it are:
- How many rooms, windows or areas are involved
- Mould in or behind the old joints
- Access and height
- The old material and how stubborn it is
There are no prices on our website, because each job is priced on what it involves. For a quick quote, please phone 0345 464 0079 or drop us an email.
Asking for a quote
To make quoting easier, let us know:
- How many joints, rooms or windows are involved
- Any previous sealing or DIY work
- Any access issues, like height or stairs
- The address or postcode of the job
For remedial sealant in Whempstead, ring 0345 464 0079 or email us. A short description of the job and where it is helps us quote, and you’ll get a clear quote before work begins.
Towns and villages near Whempstead
More services for Whempstead
Questions from Whempstead
Is Whempstead within the area you cover?
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 work for landlords with property near Watton-At-Stone station?
Yes. We work for letting agents and landlords as well as homeowners, 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.
Can you take off two layers of silicone?
Yes. Each layer is cut out and the residue cleaned off, before resealing with a single bead.
Can you remove old sealant without damaging the bath?
Yes. Residue is removed with a product suited to the surface rather than scraped hard, so the new sealant bonds cleanly.
Are you fully insured?
Yes. We are fully insured.
Someone resealed my shower and it’s leaking again. Can you help?
Yes, usually. First we check whether the leak is the sealant at all, then strip and reseal the joints.
Can I choose the sealant colour?
In most cases you can choose. We will explain which colours are available and agree one before work begins.
How long does remedial resealing take?
Allow a few hours for most joints, depending on how much old sealant has to come out. We will give you a timescale when we quote.