Ardex WPM 300 水性環氧防水膜 / 20L

Key features

• Water-based epoxy — solvent-free, non-flammable, low odour; suitable for poorly ventilated interior spaces
• Positive and negative water pressure — can be applied from either the water-facing or the dry side
• Applies to damp and green concrete — excellent adhesion to damp substrates and freshly cast concrete
• Prevents rising damp and efflorescence — acts as a vapour barrier
• Overpaintable — can be overcoated once cured
• Broad substrate adhesion — concrete, brick, masonry, stone and timber
• Chemical resistance — passes acid, alkali and UV tests

Applications

• Negative-side waterproofing — basements, tunnels, retaining walls, lift pits
• Positive-side waterproofing — water tanks, reservoirs, pools
• Damp-proof membrane — blocks rising damp for subsequent floor coverings
• Green-concrete sealing — waterproof barrier on freshly hardened concrete

Why choose Ardex WPM 300

• Water-based = safe — no solvents, non-flammable, low odour in enclosed spaces
• Two-way waterproofing — one product for positive and negative pressure
• Damp-substrate application — no waiting for the substrate to dry

Application notes

Substrate must be sound and clean. Mix A + B with an electric stirrer. Dampen dry concrete before application. Minimum two coats in alternating directions. Refer to TDS for coverage, thickness and curing.

Application demo video

FAQ

Can WPM 300 be used for negative-side waterproofing?
Yes. It handles both positive and negative water pressure.

What is the difference between WPM 300 and Sikagard 720?
Both suit negative-side waterproofing. WPM 300 is a water-based epoxy membrane (brush/roller); 720 EpoCem is an epoxy-modified cementitious mortar (trowel-applied). Choice depends on substrate and project design.

Can WPM 300 be used in drinking-water tanks?
Yes. Approved under BS 6920 for potable-water contact.

Most products typically in stock. Refer to the TDS for details, or WhatsApp Wah Hing.