Skip to content
Williams & Co Paint Contractors

Approved applicator & authorised reseller, Durbanville, the Northern Suburbs and greater Cape Town

The waterproofing the trade uses, sold to you at trade level.

Rubber Sealant® Liquid Rubber goes on as a liquid and cures into one seamless rubber skin with no seams, no laps and no torch. We are an approved applicator and an authorised reseller, so you can buy the drum in Durbanville, or hand us the roof. Prices, coverage and the small print are all on this page.

  • Based in Durbanville, working Durbanville, Aurora, Vierlanden, Eversdal, Welgemoed, Bellville, Brackenfell, Kraaifontein, Kuils River, Plattekloof, Sonstraal Heights, Panorama, Kenridge, Fisantekraal and surrounds
  • WhatsApp us and we reply during office hours.
  • Written scope, one fixed price for the job

Problem & approach

Where these projects go wrong, and how we handle them.

The usual problem

Most waterproofing sold in Cape Town fails for the same three reasons, and none of them are the weather. The first is seams: any system that comes in a roll has joins, and a join is a future leak with a date on it. The second is preparation: a coating rolled over a dusty, unprimed, chalked surface has nothing to grip, so it looks perfect on handover day and lifts off in sheets by the second winter. The third is thickness. A product that needs three coats to reach its cured build gets one thin one, because the person applying it is paid by the job and not by the millimetre. Then there is the shopping problem. Walk into a hardware chain and you will be sold a bucket of white acrylic roof paint with the word waterproof on the front, at a price that looks reasonable until you learn that it is a paint, not a membrane, and that it has no guarantee behind it worth the name.

Our approach

Rubber Sealant® Liquid Rubber is a water-based liquid rubber membrane. It is brushed or rolled on straight from the drum, three coats, and cures to roughly 3mm of flexible rubber that moves with the building instead of cracking with it. Because it goes on wet, it seals around every bolt head, lap, upstand, pipe and awkward corner as one continuous piece. We are an approved applicator and an authorised reseller, which means two things for you. If you are doing the work yourself, you buy the same drums we use, at the manufacturer's recommended prices, with the correct primer and the honest coverage figures instead of the optimistic ones on the tin. If you would rather not be on a roof in February, we apply it: inspection, written scope, one fixed price for the whole job, three coats built to specification, guarantee documentation at handover.

Published prices

The whole price list, including the primer nobody mentions.

ProductWhat it is forPrices including VAT
Rubber SealantThe flagship liquid rubber1L R199 · 5L R790 · 20L R1 990
Bonding Liquid Super+The primer for almost every surface1L R189 · 5L R490 · 10L R890 · 20L R1 650
Etch Primer Rust SupremeThe primer for raw and rusted metal1L R195 · 5L R750 · 10L R1 450 · 20L R2 390
Snow White Cooling AgentTop coat that reflects heat1L R299 · 5L R890 · 20L R2 460
Rubber Sealant AquaBitumen based, for holding water in1L R199 · 5L R790 · 20L R1 990

Prices are the manufacturer's recommended retail prices including VAT and can change without notice. We confirm the price and availability when you enquire.

Coverage at three coats

A drum price means nothing until you know the surface.

Surface20L drum coversPrimer it needs
Smooth, flat surfaceabout 40Bonding Liquid Super+
Galvanised or Chromadek sheetingabout 33Etch Primer Rust Supreme
Painted steel or painted metalabout 33Etch Primer Rust Supreme
Raw, bare or rusted metal, IBR, corrugated, zincabout 33Etch Primer Rust Supreme
Torch-on membraneabout 27Bonding Liquid Super+
Concrete, brick or slababout 20Bonding Liquid Super+
Roof tile or Harvey tileabout 17Bonding Liquid Super+
Slate tileabout 13Bonding Liquid Super+
Thatchabout 3Bonding Liquid Super+

Figures are the manufacturer's, at the three coats the guarantee assumes. Rougher and more porous surfaces take more. Primer works out at roughly 6 m² a litre.

Colour

Black, plus fourteen standard colours at no extra cost.

  • Black
  • Charcoal
  • Slate grey
  • Dove grey
  • Snow white
  • Ivory
  • Sandstone
  • Terracotta
  • Brick red
  • Heritage green
  • Forest green
  • Teal
  • Navy
  • Chocolate

Black is the standing colour, and Rubber Sealant® is also mixed in 14 standard colours, so you do not pay for a top coat to get a colour. Need something off the chart? It can be custom mixed on request. The swatches above are an illustration, not a stock list: ask us for the current colour chart and we will confirm the colour with your quote.

Supply only, Durbanville

Buy the same drums we use, collected in Durbanville.

Stor-Age Self Storage, 4 Plein Street

Durbanville, Western Cape, 7550

Collection is by arrangement only. Please enquire or call first so your stock is picked, priced and someone is there to meet you. We are not open for walk-ins.

Monday to Friday, 08:00 to 17:00

Want it applied instead? See roof waterproofing

What may be included

Scope you can actually read.

The exact line items on your quote depend on the site inspection. This is the shape of what a typical project of this type includes.

  • Honest surface assessment: what it is, what it needs, whether coating it is even the right answer
  • The correct primer named up front: Bonding Liquid Super+ on masonry, tile, torch-on and painted surfaces, Etch Primer Rust Supreme on all metal
  • Coverage worked out at the manufacturer's three coats, not at one optimistic one
  • Full three-coat Rubber Sealant® build, roughly 3mm when cured
  • Reinforcement at bolts, laps, ridges, valleys, flashings, pipes and cracks
  • Colour chosen from black plus fourteen standard colours, no top coat needed to get a colour
  • Supply only from Durbanville, or supply and install, priced separately so you can compare
  • Guarantee documentation at handover

Products we work with

The Systems Behind the Work.

  • Rubber Sealant® logo

    Approved applicator and authorised reseller of Rubber Sealant® Liquid Rubber.

  • Plascon logo

    Our preferred paint on most projects.

We are not a Plascon approved applicator. Plascon is simply the paint we choose to specify for its quality and track record, and we will recommend a different system where a project calls for it.

Our process

8 steps from enquiry to handover.

  1. 1

    Enquiry: tell us the surface, the rough area and whether you want product or the job done

  2. 2

    Surface and primer confirmed, and coverage calculated at three coats

  3. 3

    Written price: product list, or one fixed price for the whole job

  4. 4

    Collection arranged in Durbanville, or a site date booked

  5. 5

    Clean and dry the surface, then prime it correctly

  6. 6

    Detail work first: bolts, laps, cracks, upstands and penetrations

  7. 7

    Three coats of Rubber Sealant®, each one allowed to cure

  8. 8

    Final check, drainage check, handover and guarantee documentation

Honest limits

What we will tell you up front.

A proper contractor should be honest about what a service can and cannot do. These are the things we will always flag.

  • Liquid rubber is the only waterproofing system we apply. We do not install torch-on membranes and we do not do injection damp courses.
  • Rubber Sealant Aqua is the bitumen-based product for holding water in, such as dams and ponds. It is not for roofs, walls or foundations. A swimming pool shell is Rubber Sealant Splash, not the standard sealant.
  • Loose rust, flaking paint, blisters and lifting laps have to come off before priming. Primer bonds to sound surfaces, not to a surface that is already letting go.
  • The 13-year manufacturer product guarantee applies only where the manufacturer inspects, the system is specified correctly, the application is certified to thickness and the maintenance conditions are met. Individual products applied on their own carry a shorter product guarantee.
  • Prices shown are the manufacturer's recommended retail prices including VAT and can change without notice. We confirm price and availability when you enquire.
  • Collection in Durbanville is by arrangement only. We are not open for walk-ins.
  • We do not remove, cut, drill or dispose of asbestos. We seal sound sheeting in place.

Not sure what your rubber sealant® liquid rubber needs? Send us a photo.

Take one photo on your phone, send it on WhatsApp, and we will tell you what we are looking at. We are in Durbanville most weeks, so a site visit is easy to arrange.

WhatsApp a photo

FAQ

Rubber Sealant® Liquid Rubber: questions we hear

Budgeting

Want the numbers before you phone anyone?

We publish real Cape Town rates, including our own, and explain exactly what a cheaper quote leaves out.

Related work

Recent projects like yours.

A few real Williams & Co jobs. More in the projects gallery.

Double-storey home | full exterior repaint

Exterior Painting

Double-storey home | full exterior repaint

A weather-worn double-storey exterior stripped back, prepared and repainted in a clean two-tone scheme.

Single-storey home | exterior and trim

Exterior Painting

Single-storey home | exterior and trim

Walls, fascias and trim brought back to a crisp finish, with cracks treated before any coating went on.

Tiled roof | cleaned and coated

Roof Painting

Tiled roof | cleaned and coated

Tiles cleaned down, ridges checked and re-bedded where needed, then coated with a specified roof system.

Keep reading

The pages our Durbanville clients read before they phone us.

Start here

Durbanville, service by service

Where we work

Complexes, commercial & managed buildings

Business parks & work at height

Specialist systems

Durbanville and surrounds

Get a fixed price for your rubber sealant® liquid rubber.

Three ways to start, all of them quick. Send a WhatsApp, tap to call, or leave your details and we come back with a written scope and one fixed price for the whole job.

WhatsApp Leroy now Call 079 435 6308

Monday–Friday 08:00–17:00

What happens after you send it

We reply, ask the few questions that matter, then book a proper look at the property. You get a written scope, one fixed price for the whole job, and a straight answer on what we will not do.

One-year workmanship guarantee on qualifying Williams & Co work.

Takes about 20 seconds

Send your details instead

No call centre. Your details come straight to Leroy.