Mastic & silicone sealing in North London & the Home Counties
Mastic & silicone sealing is the core trade behind every service on this site — correct removal, substrate preparation and a finished joint that lasts. The right sealant for the substrate, correctly prepared, properly finished, whatever the job.
What the job includes
Before
After- Full removal of existing sealant, including residue and adhesive
- Substrate cleaned, dried and prepared before application
- Correct product selected — silicone, mastic, low-modulus or intumescent
- Domestic and commercial work, single rooms to full fit-outs
- Colour-matched sealant where a specific finish is needed
- Work area left clean and ready to use
How the work runs
Scope agreed
We confirm exactly what's in scope and price it before starting, whatever the size of the job.
Strip out
Old sealant removed in full — the step most failures come back to.
Prepare
Surfaces cleaned and dried so the new sealant bonds properly.
Apply & finish
Applied and tooled to a clean line, then checked before we leave.
Work in this trade
Mastic & silicone sealing FAQs
What's the difference between mastic and silicone?
Mastic is a paintable, oil-based sealant used mainly on timber joinery and skirting. Silicone is flexible, water-resistant and used in bathrooms, kitchens and wet areas — it can't be painted.
How long does a sealant joint last?
It varies too much — movement, moisture, maintenance and the product used all affect it — for one confident number to cover every joint. As a working example, a well-prepared bathroom joint typically runs 8–12 years under normal conditions. Most early failures trace back to sealant applied over the old joint rather than a fresh, clean substrate.
Do you work on commercial sites?
Yes. We take on domestic and commercial work, including multi-unit developments and fit-outs run to a programme.
Do you offer a guarantee on the work?
Yes, workmanship is guaranteed. If a joint fails through poor application within the guarantee period we'll return and put it right.
Get a price for your job
Send a couple of photos and rough measurements and we'll quote from those. Or call 07413 240639.