Bathroom
WaterproofingSEAL · BAND · TILE-READY
A flexible cementitious membrane system for wet areas — applied behind the tiles, sealed with reinforcing band at every corner, drain and pipe penetration to stop the hidden seepage that rots walls, ceilings and adjacent rooms.
What is Bathroom Waterproofing?
Bathroom waterproofing is a concealed, flexible membrane system applied to the floor and lower walls of a wet area before tiling, so water that passes through grout and tile joints is stopped at the membrane instead of soaking into the slab. The hardest part of a bathroom is never the open floor — it is the corners, the wall-to-floor junctions, the floor drain and every pipe penetration, where almost all leaks begin. POLYZEN seals these with a reinforcing band and collar, then builds a two-coat flexible cementitious membrane that bridges hairline cracks and bonds tile adhesive on top — stopping the slow seepage that stains ceilings below and damages adjacent rooms.
How the System Is Built
A bathroom is sealed at its weak points first, then membraned across the whole wet area before tiling. Tap any layer to see its role.
Tile-Ready Bonding Surface
The cured membrane provides a sound, bondable surface that accepts tile adhesive directly, so tiling proceeds normally over a fully sealed wet area with no loss of bond. System values: Per TDS.
Engineered & Installed by POLYZEN
Bathroom waterproofing is delivered as a POLYZEN Applied System — surveyed, designed and installed turnkey by POLYZEN's trained applicators, with membrane, banding and drain detailing specified to your wet area before tiling.
Sealed Where Leaks Begin
Tiles and grout are not waterproof — water passes through the joints every day. A bathroom stays dry only if a continuous membrane sits behind the tiles and is detailed correctly at corners, drains and penetrations. That detailing is where POLYZEN's system earns its warranty. Performance is confirmed on the project specification.
Membrane type, number of coats, upstand height and detailing are specified per wet-area layout and exposure. POLYZEN confirms finished values on the project specification and does not publish fabricated figures.
The Application Process
Inspect & Assess
Check slopes, drains, existing leaks and substrate; plan upstand heights and detailing.
Prepare & Detail
Clean, correct falls to drain, repair cracks, prime, then band corners and collar drains and pipes.
Membrane & Cure
Two cross-directional coats of flexible membrane across floor and walls to required height, then cure.
Test & Handover
Flood / ponding test for watertightness, final inspection and written warranty before tiling.
System Specifications
| Property | Detail |
|---|---|
| System Type | Bathroom / Wet-Area Waterproofing |
| Delivery | POLYZEN Applied System (turnkey) |
| Membrane Type | 2K flexible cementitious (under-tile) |
| Detailing | Reinforcing band at corners + drain / pipe collars |
| Build-Up | Primer + Banding + 2-Coat Membrane + Tile-Ready |
| Finish Compatibility | Receives tile adhesive directly |
| Coverage | Floor + wall upstands to required height |
| Coats / Thickness | Per Project Specification |
Ideal Applications
Download Technical Data
Applied & Warranted
Every POLYZEN bathroom waterproofing system is installed by trained applicators and flood/ponding tested before tiling, then handed over with a final inspection and a written system warranty. Warranty terms are confirmed per project scope, layout and substrate condition.
Frequently Asked Questions
Related Waterproofing Systems
Seal It Before You Tile.
Get a wet-area assessment, detailing plan and quote for your bathroom.