Mastic man in Harrow

Mastic and sealant work in Harrow

Harrow is a borough of three towns, Harrow, Pinner and Stanmore, together with Wealdstone, Harrow Weald, Rayners Lane, North and South Harrow and part of Edgware. Mr Mastic comes up from Crawley to work across all of it, resealing baths, showers and kitchens, renewing window and door mastic, and taking on sealant work for landlords and commercial clients.

The jobs we see here follow the borough’s housing closely. Bathrooms in 1930s semis that have been refitted two or three times, uPVC windows whose mastic has dried and shrunk, and flats in the newer town-centre blocks where the developer’s sealant has split are the most common. We take the old sealant out completely, prepare the joint and apply a neat, durable bead. Kitchens get the same care, with food-safe sealant by the sink and a colour-matched finish along the worktop. You’ll know exactly what the job involves, and the price, before we start.

The heart of Metro-land

Harrow sits at the centre of what was called Metro-land, and almost two-thirds of its homes date from between the wars, when the Metropolitan line brought rapid house building. The borough’s population grew from around 22,700 in 1901 to about 146,600 by 1941. Rayners Lane, North Harrow and much of Pinner and Stanmore are lined with semis and short terraces from this period, many with bay windows, and Rayners Lane itself is now a conservation area.

Older property sits alongside it. Harrow on the Hill is a conservation area with Georgian listed buildings, and the borough has a long list of others, including Pinner High Street, Stanmore Hill and Canons Park. Here, timber windows, older render and soft brick need careful, slim sealant work in sympathetic colours.

The town centre has changed most in recent years. Harrow Square, a 19-storey scheme by the station, and other new apartment blocks have brought hundreds of flats, while older office buildings on Lyon Road have been converted to homes. Shower trays and baths in these flats are often fitted over timber or screed that moves slightly in the first years, so the original sealant tends to crack. Our bathroom resealing service covers the full strip-out and reseal.

Our services in Harrow

• Bathroom & kitchen resealing: Baths, showers, basins, wet rooms, worktops and sinks: old sealant cut out, mould treated and a new bead of anti-fungal silicone laid.
• Window & door mastic: Window and door mastic that has dried out in the sun replaced with a weather-resistant joint that can move with the frame.
• Commercial & hotel sealant: Guest bathrooms, staff washrooms and kitchens in commercial buildings resealed in a planned order that keeps the site running.
• Remedial sealant & repairs: Second opinions on sealant that keeps failing: we strip it out, check for movement or leaks and reseal it properly.
• Fire-rated sealant: Intumescent and fire-rated joints around pipes, cables and frames, installed to the manufacturer’s tested specification.
• External & façade joints: Expansion joints in brick, render and cladding cut out and renewed at the right depth so they can move without splitting.
• New-build mastic & snagging: New-build bathrooms, kitchens and frames resealed where the original sealant has cracked as the house settles.
• Floor & skirting joints: Skirting-to-floor gaps, tiled floor movement joints and concrete floor joints sealed with the right product.
• Regrouting: Tired or mouldy grout raked out and renewed, and the internal corners finished in flexible silicone.
• Glazing & conservatory sealant: Glazing joints on conservatories, roof lanterns and screens renewed with a sealant suited to glass and frames.
• Gutter, fascia & soffit sealing: Dripping gutter joints and end caps, and gaps at fascias and soffits, sealed with weatherproof exterior sealant.
• Sand mastic for sash & case windows: Old sand mastic around sash windows and doors raked out and renewed with traditional burnt sand mastic.

Why Mr Mastic in Harrow

We do one thing: sealant. That focus, built over 20+ years, is why Harrow customers can expect a clean, lasting finish. Mr Mastic is fully insured and ARBOMaster approved, and we use Arbo and Everbuild sealants. Our record runs to 2,847+ projects and a 4.9-star Google rating from over 180 five-star reviews. You’ll get a clear quote up front and a one-year guarantee on the finished work.

Places we pass in Harrow

The nearest station to the town centre is Harrow-on-the-Hill station. Places most people will know nearby are St. George's Shopping Centre (0.7 miles north-east) and Kodak Museum (1.3 miles north). Typical jobs near the centre are in homes and businesses around Grange Primary School, Whitmore High School, Orley Farm School and Church of St Peter. For open space, Islip Manor Meadows and Northala Fields are close by.