Liquid Membrane FAQs


What is the Liquid Membrane?

The SEMCO Liquid Membrane is one of the most advanced anti-fracture & waterproof liquid membranes on the market. It’s a single component water-based waterproofing and anti-fracture membrane. Consisting of a self-contained elastomeric fluid suspended in a copolymer adhesive, this revolutionary blend enables easy application while providing excellent bridging, and waterproofing.

How can I purchase Liquid Membrane?

The Liquid Membrane can be purchased via our SEMCO Works online store. This is a separate online storefront you can purchase Waterproof Liquid Membrane by clicking here.

Where can Liquid Membrane be applied to?

  • Wet Rooms / Showers

  • Swimming Pools

  • Wooden Surfaces

  • Unstable Substrates

  • Flat Roofs

What can Liquid Membrane be applied over?

  • Concrete

  • Plywood, Villaboard

  • Stone

  • Tiles

  • Compressed sheeting

  • Exterior/ interior cladding

What is the coverage of one bucket of Liquid Membrane?

One 20L bucket of Liquid Membrane covers approximately 50m2.

What tests have been done for the Liquid Membrane?

You can view tests and datasheets of the Liquid Membrane by clicking here.

Laboratory Test Results
(In Accordance to AS 4858 Wet Area Membranes)

AS 4858 - Acceptance of Cyclic Movement: Pass

AS 4858 - Durability - Control: 1375% Class III

AS 4858 - Durability - Water Immersion: 588% Pass

AS 4858 - Durability - Bleach Immersion: 1032% Pass

AS 4858 - Durability - Detergent Immersion: 487% Pass

AS 4654.1 - Durability - Heat Aging (80°C / 14 days): 1300% Pass

AS 3558.1 - Water Absorption: 2.33% Pass

ESTM E96 - Moisture Vapour Transmission Rate: 3.07g/m2/24 hours

ESTM C794 - Bond Strength: 29.81 N

AMTM004 - Temperature Resistance: 2.70g/m2/24 hours

ANSI 118.10 – Breaking Strength (ASTM D751, Procedure B): Pass

ANSI 118.10 – Dimensional Stability (ASTM D1204): Pass

ANSI 118.10 – 7-Day Shear Strength (ASTM C482-9.8): 173 PSI / shear

ANSI 118.10 – 7-Day Water Immersion Shear Strength: 132 PSI

ANSI 118.10 – 4-Week Shear Strength: 234 PSI

ISO 37 – Tensile Strength ( ASTM D412 ): Maximum Stress 453 PSI

ISO 37 – Tensile Strength ( ASTM D412 ): Ultimate Elongation: 321 %

ASTM D42370 – Tensile Strength: Maximum Stress: 184 PSI

ASTM D42370 – Tensile Strength: Ultimate Elongation: 520%