Product Guide
There is no single "best" waterproofing product. There is only the right system for the specific surface, slope and exposure you're trying to protect. Apply the wrong system — even the most expensive one — and it will fail.
Three systems do 90% of the work in the Western Cape: Uniflash, torch-on bitumen, and rubberized waterproofing paint. Below is what each one excels at, and where each one fails.
| System | Best Surface | Lifespan | Cost Range | Application |
|---|---|---|---|---|
| Uniflash | Sidewalls, headwalls, parapet caps, pitched roof joints | 12–15 years | R400–R700 per linear m | Self-adhesive aluminium-faced membrane, roller-pressed |
| Torch-On Bitumen | Flat roofs, concrete slabs, large flat surfaces | 15–20 years | R350–R550 per m² | Heat-welded with gas torch onto primed surface |
| Rubberized Paint | Pitched tile/metal roofs, as a finish coat | 5–8 years | R120–R220 per m² | Brush, roller or spray-applied liquid |
Uniflash is a self-adhesive bitumen membrane with an aluminium foil top layer. It bonds aggressively to clean, primed substrates and is unmatched for detail work.
Use Uniflash for:
Uniflash's aluminium face reflects UV, so it lasts longer than membranes that need a separate top coat. It's also fast to apply — most jobs are done in a day with no curing time.
Where it's wrong: Don't use Uniflash on large flat areas. The seams between strips become weak points under standing water.
Torch-on is a thick rubberised bitumen sheet that's heat-welded with a gas torch onto a primed concrete or screed surface. It creates a near-monolithic, fully bonded layer that can handle standing water.
Use torch-on for:
A two-layer torch-on system ("double-touch") gives you 15–20 years of protection in the Cape climate. It can be left exposed or covered with screed/tiles afterwards.
Where it's wrong: Don't torch-on a pitched roof — it's overkill, ugly, and the heat application is dangerous near combustible timber.
Rubberized waterproofing paint (acrylic or polyurethane-based) is a flexible liquid coating. It's the most commonly misused product in South Africa because it's cheap and easy to apply — which tempts homeowners to use it everywhere.
It's genuinely excellent as:
It's genuinely not a standalone solution for:
Rubberized paint over a real waterproofing problem is a R3,000 way to ignore a R15,000 problem for one season.
We re-do dozens of failed waterproofing jobs each year. The pattern is consistent:
The repair almost always costs 2–3× what the correct job would have. And every failed job means another winter of moisture inside the structure.
Choosing waterproofing without seeing the surface is guesswork. Our free assessments include a recommendation for the specific system your roof, walls, and exposure require — with quotes for each option.
We'll never sell you a more expensive system than you need. We'll also tell you honestly when a refresh top-coat is all that's required.
Book a free consultation and we'll match the right system to your home.
