Mastic Sealant Specialists in South Wales
Professional mastic and silicone sealing for homeowners, builders, developers and commercial clients.
All Sealants Ltd provides professional mastic sealant and silicone sealing services across South Wales for homeowners, builders, developers and commercial clients. We cover kitchens, bathrooms, windows, doors, flooring, render joints, expansion joints, new-build handovers and larger site work.
Domestic mastic sealant work
We reseal kitchens and bathrooms with mould-resistant sanitary silicone, refresh tired joints around baths and showers, and seal worktops, sinks and splashbacks with neat, durable finishes.
Homeowners in supported postcodes get an instant online guide price when they submit the enquiry form — choose your job type, or select Other if you need more than one area priced together (photos required). Higher guide prices usually reflect careful removal of old mastic so we do not damage tiles or bathrooms.
- Kitchen worktop and sink sealing
- Bathroom, bath and shower reseals
- Floor and skirting joint sealing
- Internal and external window and door perimeters
Commercial & new-build mastic sealing
Builders, developers and main contractors use All Sealants Ltd for programme-led sealing packages, new-build residential handovers and commercial fit-out work across South Wales and the wider UK. See our commercial mastic and sealant contractors page for tender and site package details.
- New-build apartment and house sealing
- Commercial washrooms and kitchens
- Render, cladding and external joint sealing
- Expansion joints and larger site packages
Areas we cover in South Wales
We are based in Ystradfellte, Aberdare, and regularly work across Cardiff, Swansea, Newport, Neath, Port Talbot, Bridgend, the Cynon Valley, Merthyr Tydfil, Carmarthen and surrounding postcodes.
Mastic sealant projects in South Wales
Kitchen, bathroom, render and commercial sealing work from our team across South Wales.
kitchenKitchen and wet-area silicone sealingSouth Wales 
bathroomBath and wall tile sealingSouth Wales 
bathroomToilet and vanity unit silicone sealingCardiff area 
bathroomBathroom floor and corner sealingSouth Wales 
bathroomShower tray reseal — before and afterSouth Wales 
interiorBay window board and skirting sealingSouth Wales
Trusted by homeowners and site teams
Feedback from domestic and commercial clients we have supported across the region.
“Our ensuite needed a full reseal — old silicone had gone black. Neat finish, left tidy, and they explained what product they used. Very happy with the result.”
“Reliable on programme for our handover sealing. Good communication with site management and consistent finishes across the plots we allocated.”
“Quick turnaround on our kitchen worktop seals after fitting. Professional team — would use again for bathroom work.”
Mastic sealant FAQ
What areas do you cover for mastic sealant work in South Wales?
We cover Cardiff, Swansea, Newport, Neath, Port Talbot, Bridgend, Aberdare, Merthyr Tydfil, Carmarthen and the surrounding South, East and West Wales area from our base in Ystradfellte.
Do you seal kitchens and bathrooms as well as commercial sites?
Yes. We carry out domestic kitchen and bathroom silicone work alongside commercial and new-build sealing packages for builders and developers.
How do I get a quote for mastic sealing in South Wales?
Homeowners get an instant online guide price after submitting the domestic enquiry form. Commercial clients can request a tender callback with project scope and programme details.
What types of mastic and silicone work do you provide?
Kitchen worktops, bathroom reseals, window and door perimeters, render joints, expansion joints, new-build handovers and larger site sealing programmes.