Commercial Sealant Contractors in Lewes
Need commercial sealant contractors in Lewes? Send us the details for a fixed quote, backed by a 12-month guarantee on the work.
- Sanitary sealant that has gone black and patchy
- Expansion joints with the sealant torn out
- Messy, uneven beads from earlier work that let the building down
Need commercial sealant contractors in Lewes?
Share the site address and what’s failing, and we’ll reply with a fixed quote or arrange a visit.
Honest limits
We seal joints; we don’t mend everything behind them. Sealant alone won’t deal with:
- Faulty windows rather than failed perimeter sealant
- Cracking that needs a structural engineer to look at it
- Removing asbestos-containing materials (a licensed or specialist contractor’s job)
If in doubt, give us a call on 01277 525 020 or email drawings and photos and we’ll say what we think before you book.
What we seal
- Movement joints in walls and floors
- Washrooms and tea points
- External facade joints
- Window and door perimeters
- Kitchen worktops and splashbacks
- Floor and threshold joints
Commercial mastic work in Lewes
On older buildings, particularly those put up before 2000, some old mastics and sealants may contain asbestos. We ask to see the asbestos register or survey before old sealant is disturbed. If a material is suspected, work stops until it’s tested (removing asbestos-containing materials isn’t something we do). Most enquiries involve water staining near frames, panels or ceilings and messy, uneven beads from earlier work that let the building down, on kitchen worktops and splashbacks, window and door perimeters and floor and threshold joints. Looking for mastic applicators who cover Lewes? Mastic Doctor has worked for contractors, FMs and building owners since 2005.
In Lewes, as anywhere, the first joints to go are normally the ones that work hardest: frame perimeters in the sun, floor joints at doorways and anything that gets wet every day.
In towns of Lewes’s size, shops and offices often occupy older buildings with later extensions and new shopfronts. Where old meets new there are junctions between brick, render, timber and aluminium, and each needs the right sealant.
Guaranteed is the last step of every job. Our workmanship is backed for 12 months, and the quote explains what it covers.
- Where
- Lewes (BN7, BN8, BN6, RH15)
- Region
- East Sussex
- Guarantee
- A 12-month guarantee
- Price
- Quoted before any work starts
- Call
- 01277 525 020
- Updated
- 3 November 2026
When to bring in a specialist
Certain joints really need a specialist: fire-rated seals that must follow a tested detail, trafficked floor joints and external movement joints among them. A poor seal in places like these tends to cost more to put right later.
Redoing a failed joint normally costs more than getting it right at the outset, because the whole bead must be removed and the faces cleaned back again. That’s why many clients bring in a specialist from the beginning.
Common problems we fix in Lewes
If sealant tears through its centre, it has failed cohesively. That normally means the joint stretched further than the product could cope with because the bead was too thin, the joint over-stretched or the movement class wrong. The same product in the same joint tends to fail the same way.
It’s worth sending us details if you spot any of the following:
- Black mould through washroom sealant that won’t clean off
- Layers of sealant, all of them failing
- Leaks that seem to come through a sealant line
- Hardened, chalky sealant on south-facing or exposed elevations
If you run a unit on an estate such as Riverside Industrial Estate, which lies east of Lewes, the trade counter, offices and staff facilities have joints to look after as well as the warehouse.
Comparing quotes
- Proof of insurance
- How they’ll work around occupants
- Is depth set with backing rod, or bond-breaker tape in shallow joints?
- Will failed sealant be removed rather than covered?
Places near Lewes
What else we do in Lewes
What happens if it’s left?
On many buildings the mastic was done by whichever trade was on site. Choosing the product, setting the depth and preparing the faces are what a specialist brings, the three things that decide how long a joint lasts. It shows over the following seasons rather than at handover. Many buildings in towns like Lewes have been extended or altered, so joints between old and new are often the first to go. Renewing them before water gets in protects the fabric.
The work involved drives the cost: stripping out, preparation, sealing, access and phasing. Call for a fixed quote.
Why choose Mastic Doctor in Lewes
- A Constructionline member, so easy to vet
- CSCS-carded applicators
- Workmanship guaranteed for 12 months
- Colour options checked against the specified product
Our process
The first thing on site is a walk round with your contact, to confirm the scope, the order of work and any areas we must keep clear. After that, any old or failed material is removed, each joint is prepared and the new sealant goes in. In a town such as Lewes, most jobs are single buildings. We start with your photographs, drawings or a site visit, then send a fixed quote.
- We start with the evidence: photos, drawings or a look on site.
- You get a fixed quote covering removal, preparation and the new sealant.
- We agree the order of work, access windows and site hours with you.
- The failed sealant comes out and the faces are prepared, with primer where required.
- Depth is set with backing, then the sealant is applied, tooled and the area tidied.
- Completed areas are signed off with you under our 12-month guarantee.
Before we start on site
- Move anything stored against the joints
- Confirm the product named in the specification
- Agree which areas must stay open
Ask for a quote
Let us know the site, the scope and your timescale, and we will put a fixed quote together. The easiest way is to call the office on 01277 525 020 or send photos by email.
Advice
Lewes: questions and answers
Do hotels near Lewes have to close for sealant work?
Rarely, if ever. We take a few rooms out at a time. Housekeeping and our team agree each day’s rooms.
Is Riverside Industrial Estate, near Lewes, within your area?
Yes. We cover Lewes and the area around it, including industrial estates, business parks and retail parks such as Riverside Industrial Estate. Send details of the unit and the work through our quote form for a quick quote.
What guarantee do you give on resealing?
A 12-month guarantee covers the workmanship from handover. Looking after the joints as we advise helps them last.
Can you handle sealant work across several sites?
Yes, across South East England, Greater London and all of Scotland. Each site gets the same process and a single contact.
Will you just go over the old sealant?
No. Sealing over old material is one of the classic causes of early joint failure, so everything comes out first.
Do you hold CHAS accreditation?
Yes. Mastic Doctor is CHAS accredited and a Constructionline member.
How soon can the area be used again?
The product and site conditions decide that. Some products skin over quickly but need longer to cure fully, so we’ll confirm the curing time on the day.
Sealant on show in Lewes’s commercial buildings
A 2-mile radius around Lewes takes in a number of hotels. A hotel refurbishment is full of joints that guests will see, and a matched colour keeps them discreet; work is planned so the hotel keeps trading. Lewes is in the South East, one of the UK’s drier regions. External joints still need dry faces and the right temperature, and damp or frosty mornings can hold work up.
Refits at hotels like Shelley's Hotel, less than half a mile to the south of Lewes, bring joints at vanity tops, bars and reception desks that guests see every day. Sites a few miles apart, such as Riverside Industrial Estate and Phoenix Industrial Estate, can share one programme and one point of contact.
Lewes is about 7 miles north-east of Brighton, in East Sussex. We cover Lewes and the rest of East Sussex, with the same fixed quotes and 12-month guarantee as everywhere else. 308 places across East Sussex fall within our area, Lewes among them. We also cover Brighton, around 7 miles from Lewes.
Postcode districts covered here: BN7, BN8, BN6 and RH15. For a building on Market Lane, Market Street and High Street or nearby, send details and we’ll quote for sealant joints. Main routes into Lewes include the A26 and A275, which helps when planning parking and deliveries for the job. Just outside Lewes, we also work in South Malling (1 mile north-east), Southover (1 mile south-east), Cliffe (1 mile east), Offham (1 mile north-west) and Hamsey (1 mile north). Further afield, our area takes in Eastbourne (14 miles south-east), Seaford (8 miles south-east), Hailsham (11 miles east), Crowborough (14 miles north-east), Uckfield (8 miles north-east) and Newhaven (6 miles south). As one of the bigger centres in East Sussex, Lewes has a broad mix of commercial, public and industrial buildings, and we cover them all.
Landmarks near Lewes
We work on buildings around Priory School, St Pancras Catholic Primary School and Railway Land, among other places. Lewes’s nearest station is Lewes station, roughly 0.6 miles south-east of the centre. A little further out are Lewes Victoria Hospital (0.5 miles west) and Museum of Agricultural Bygones (3.9 miles east). Open spaces near Lewes include Offham Hill and Malling Down.
After the work
Sealant joints are maintenance items, and how long they last depends on how they’re treated. Our advice:
- Brief cleaning contractors to avoid scourers and blades on sealant
- Look at the sealant around anything that has been moved or replaced
- Make sure contractors see the asbestos survey before cutting out old mastic
- Keep washroom and kitchen extraction working
Give fresh sealant time to cure before it’s cleaned, wetted or walked past. Cure time varies with the product, conditions and depth of the joint. Leaving the area closed until then keeps the bead neat.
Tenants and staff spot black or split sealant quickly. Replacing it on a planned cycle keeps complaints down.