Mastic man in South Darenth

Your local mastic man for South Darenth

South Darenth is a village in the Darent valley, part of the parish of Horton Kirby and South Darenth in Sevenoaks District, about four miles east of Swanley and south of Dartford. Mr Mastic covers the village and its neighbours from our base in Crawley, resealing baths and showers, kitchen worktops and basins, and replacing tired mastic around windows and doors.

The job is the same wherever we go: cut out the old sealant, clean and dry the joint, deal with any mould, and lay a fresh bead of the right product. We never run new silicone over old, because it doesn’t bond and peels away within weeks. Our page on silicone removal explains how we take the old bead out without scratching baths or tiles.

A village that grew around its mill

Before 1820 there were only a few farms, cottages and a forge here. That year, Henry Hall built the Horton Kirby mill beside the Darent, and the village grew up around it. The mill began as a flour mill and later became a large paper mill, and small terraced houses were built close by for the people who worked there. The mill’s chimney, extended in 1918, is now Grade II listed.

The mill closed in 2003, and the site has since been redeveloped extensively for housing, with a Co-op food shop in one of the listed mill buildings. That gives South Darenth an unusual mix: old workers’ terraces, newer homes on the mill site, and family houses on the roads around the village.

The terraces tend to have small bathrooms that have been refitted more than once, so we often find layers of old sealant and gaps where a bath has dropped. On the newer mill-site homes, developer sealant around showers and worktops often splits as the buildings settle. Our new build mastic page covers what we check.

Sealant services across South Darenth

• Bathroom & kitchen resealing: Bathroom and kitchen joints taken back to a clean, dry surface and finished with fresh anti-fungal silicone that won’t lift.
• Window & door mastic: Hardened, gappy mastic around frames, sills and French or patio doors cut out and renewed to keep draughts and rain out.
• 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: Leaks and lifting beads from earlier sealant jobs put right, starting with finding out why they failed.
• Fire-rated sealant: Intumescent and fire-rated joints around pipes, cables and frames, installed to the manufacturer’s tested specification.
• External & façade joints: Outside movement joints given new backing rod and a flexible, weatherproof sealant in a colour to match the wall.
• New-build mastic & snagging: Snagging sealant for new homes and plot-by-plot mastic for builders and developers.
• Floor & skirting joints: Gaps under skirting boards, tile movement joints and concrete floor joints sealed with a product that suits the traffic.
• Regrouting: Shower and splashback grout replaced where it has cracked or stained, with silicone in the movement joints.
• Glazing & conservatory sealant: Glass-to-frame joints on conservatories, rooflights and shower screens cut out and resealed.
• Gutter, fascia & soffit sealing: Gutter unions, outlets and fascia joints that leak in heavy rain cleaned and resealed.
• Sand mastic for sash & case windows: Traditional burnt sand mastic renewed around sash and case windows and doors in stone and brick.

Choosing a mastic man in South Darenth

A small village deserves the same standard as a city job, and that’s what you’ll get. Our applicators have been sealing for more than 20 years, we’re fully insured and ARBOMaster approved, and we use Arbo and Everbuild sealants. Over 2,847 projects and a 4.9-star Google rating from 180+ five-star reviews show how we work. We’ll give you a clear quote first, and every job carries a one-year guarantee.

Getting around South Darenth

From the centre, the nearest railway station is Farningham Road station. Local landmarks include Bluewater (2.7 miles north), Stone Museum of Geology (2.9 miles north) and Eynsford Castle (2.7 miles south-west). Around the centre, our work takes us to homes, rentals and businesses close to Horton Kirby Church of England Primary School, Leigh Academy, The Parish Church of Saint Mary and The Greyhound pub. Green spaces within reach include Wansunt Pit and Sawyers Lake.