How a Bina waterproofing system is built — layer by layer.
Waterproofing is a system, not a single coat. From a sound substrate through crack repair, primer and the membrane coats to a protective finish, each layer does a job. Here is exactly how the two main Bina systems are built — a flexible liquid membrane and a bonded cementitious slurry — with the manufacturer specs.
Two systems, layer by layer
Liquid membrane build-up (Multiproof 5000)
Cementitious build-up (Flexseal 2000 / Binaseal 1000)
Read top-to-bottom as built on site. Layer counts and coverage follow the product datasheet and the site condition.
Surface preparation
The system is only as good as what it sits on. Preparation differs by substrate and condition.
Sound & clean
Substrate must be sound, clean and free of dirt, dust, grease, oil and laitance. Repair honeycomb and cracks first.
Stop active leaks
Active running leaks are plugged with Bina Plug 4000 before any membrane is applied.
Prime & pre-soak
Cementitious systems are pre-soaked and SBR-primed; liquid membranes get a diluted priming coat.
Match the system to the requirement
| Requirement | Recommended system |
|---|---|
| Large flat roof / deck, heavy-duty, exposed | Torchseal |
| Exposed roof / gutter / metal, flexible, recoatable | Multiproof 5000 |
| Wet areas, tanks, basements — under tile/screed, breathable | Flexseal 2000 |
| Tanks / reservoirs, high-strength, honeycomb repair | Binaseal 1000 |
| Active running leak — stop it now | Bina Plug 4000 |
The numbers, straight from the datasheet
Real manufacturer data for two core systems. Full TDS for all five on the downloads page.
| Type | APP-modified bitumen membrane, polyester reinforced |
|---|---|
| Softening point (ASTM D36) | 155 °C |
| Cold flexibility (ASTM D5147) | 0–4 °C |
| Tensile strength (ASTM D5147) | Longitudinal 840 N/5cm · Transverse 720 N/5cm |
| Elongation @23°C | 45% (L & T) |
| Tear resistance | L 400 N · T 350 N |
| Heat resistance (110°C, 2 hr) | No flow |
| Water absorption (24 hr) | < 0.1% wt |
| Nominal weight / thickness | 3 or 4 kg/m² · 3 or 4 mm |
| Roll size | 1 × 10 m |
| Coverage | 1.15 m²/m² per layer (10cm side / 15cm end laps) |
| Finishes | Black smooth / mineral granule / sanded |
| Standards | ASTM D6222 Type II · UEAtc · CGSB 37-GP-56M · DIN 52133 |
| Type | Water-based 1-component elastomeric acrylic |
|---|---|
| Finish | Satin |
| Colours | Grey, White, Dark Blue, Red Oxide, Green Oxide |
| Recommended DFT | 500 microns |
| Coverage | 1 kg/m² per coat |
| No. of coats | 2–3 coats |
| Ultimate elongation | 300% |
| Tensile strength | 7 N/mm² |
| Drying | Touch dry 45 min · recoat 3 hr · cure 48 hr |
| Pack size | 1, 5, 20 kg |
| Thinner / cleaner | Clean water |
Method statement (warranty-grade)
01
Inspect & diagnose — identify the leak source, substrate and movement; agree the system.
02
Repair & stop leaks — cut out defects, fill honeycomb with grout, stop active leaks with Bina Plug 4000.
03
Prepare & prime — clean to a sound surface, form fillets at upstands, pre-soak/prime per system.
04
Apply the membrane — minimum two coats, reinforcing cracks and details; observe recoat and cure times.
05
Test & protect — flood/ponding test where applicable, then protect (screed/tiles) and issue warranty.
Common questions
What’s the difference between a liquid membrane and a cementitious slurry?
A liquid acrylic membrane (Multiproof 5000) stays flexible and bridges movement cracks — ideal for exposed roofs, gutters and metal. A cementitious slurry (Flexseal 2000 / Binaseal 1000) bonds to concrete and can be tiled or screeded over — ideal for wet areas, tanks and basements.
Which side do you waterproof — inside or outside?
Wherever possible, waterproofing is applied to the positive (water-facing) side so hydrostatic pressure presses it onto the substrate. For basements that means the external face; for tanks, the wet face.
Can you stop a leak that’s actively running?
Yes. Bina Plug 4000 is a chloride-free hydraulic plug that sets in seconds to stop running water, so the surface can be dried and the membrane system applied.
How long is the warranty?
Up to 10 years on qualifying systems applied by Bina-trained applicators. The exact term depends on the system and the conditions — we confirm it with the specification.
Do you provide datasheets for tenders?
Yes — published TDS for every system, plus guide specifications and method statements on the specs & downloads page.
Trusted on real waterproofing projects
Bina-manufactured systems, applied by our own teams on roofs, tanks and structures across Malaysia.
Torch-on membrane, rooftop plant
Bina-manufactured, Bina-applied
Institutional building, sealed roof
Bina-manufactured, Bina-applied
Pools & water-retaining structures
Bina-manufactured, Bina-appliedWant this system specified for your project?
Send us your surface, area and site condition. We’ll recommend the right system and quote design, supply and application in one package.