Commercial sealant contractors

What commercial sealant contractors covers

Sealant joints turn up in almost every part of a commercial building: around windows and doors, across movement joints in walls and floors, along worktops and all through washrooms. They are maintenance items, and they wear at different rates depending on movement, sun and weather, cleaning regimes and foot traffic. When they go, the result is usually water where it shouldn’t be, mould in wet areas or a building that looks neglected. Mastic Doctor has worked as a commercial sealant applicator since 2005. We take on one-off repairs, whole-building reseals and multi-site maintenance programmes for facilities managers, managing agents and contractors. The method follows the name: we diagnose why a joint failed, treat it with the right product and preparation, and sign the job off under a 12-month guarantee on our workmanship. You deal with one contact, whether the work covers a single office or a portfolio spread between Greater London, South East England and Scotland.

We work across South East England, Greater London and all of Scotland. Our workmanship carries a 12-month guarantee, we’re CHAS accredited and a Constructionline member, and our applicators hold CSCS cards.

Problems we put right

• Joints that have split, shrunk or pulled away from one face
• Mould in washroom sealant that cleaning no longer shifts
• Water coming in around frames or through external joints
• Patchy repairs by different trades across several sites
• Sealant that has hardened, chalked or cracked in the sun
• No clear record of which joints were done and when

Joints and areas we seal

• Washrooms and tea points
• Window and door perimeters
• External facade joints
• Floor and threshold joints
• Kitchen worktops and splashbacks
• Movement joints in walls and floors

Why it’s worth doing now

A failed joint on a commercial building rarely stays small. Water tracks behind frames and into floors, dirt packs into open floor joints, and washroom mould becomes a complaint. Planned resealing costs far less than the repairs that follow a leak, and it keeps buildings looking looked-after for staff, tenants and visitors.

What affects the quote

We don’t publish set prices, because no two buildings are the same. Send details and we’ll give you a fixed quote before we start. The main things that affect it are:

• How many metres of joint there are, and how many areas, elevations or sites
• How much failed sealant has to come out, and how hard it is
• Joint size, depth and whether backing rod or primer is needed
• Access: height, scaffold or MEWP access arranged by others, occupied areas
• The product the joint needs (and colour, where it matters)
• Programme, phasing and site requirements such as permits and inductions

What a good quote includes

• All failed sealant removed, never sealed over
• The product named for each joint type
• What the 12-month guarantee covers
• When each area can be used again
• Who is doing the work, their CSCS cards and the insurance in place
• What site paperwork and records are included

Aftercare

Ask cleaning teams to use non-abrasive products on sealant and to report splits, black spots or gaps early. Add a joint inspection to your planned maintenance, note the date each area was resealed, and tell us if another trade cuts into a joint we have sealed.