Wetroom & Shower Sealing
wetrooms, walk-in showers, shower trays and bathroom areas
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Mastic & Silicone Specialists
Precision in Every Seal
Specialist mastic and silicone sealing across London and surrounding areas.
Our Expertise
We provide a full range of professional sealant and mastic applications for domestic, commercial and construction projects.
Our Services
Clean, precise sealing for homes, businesses and construction projects.
Kitchen Sealing
worktops, splashbacks, sinks and kitchen joints
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Frames, trims, glass and internal and external joints.
View serviceCommercial Sealing Solutions
new builds, refurbishments, fit-outs and commercial developments.
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Skirting, Joinery & Furniture
Sealing and finishing around skirting, architraves, fitted wardrobes and bespoke furniture.
View service“Excellent, sent the request on Sunday, by the same day I had a quote with everything explained, by Tuesday the work was done, competitive pricing compared with other contractors.”
Edward Z
E3 · September 2026
“Ion was excellent. Kept me fully informed throughout including arrival time and any traffic delays. Polite, courteous and did the job very well indeed.”
Verified reviewer
TW11 · June 2026
“Punctual, courteous, neat and tidy, and a very professional job.”
Robert G
DA7 · March 2026
Need a Quote?
Tell us about your project and get in touch with Blackline Mastic.