WHY LIQUID MEMBRANE?

For over 25 years, I have been developing a line of surface products designed to meet the diverse needs of our clients. Along the way, I have been met with many challenges. Our clients wanted a product that streamlined the waterproofing process, offered the durability and strength to stabilize multiple surface types and wood substrates, and also function as a waterproof adhesive. Unlike many product on the market that only accomplish one or two of these requirements, my goal was to create a single, high-performance solution that could meet all of them. That “one source” solution is: “SEMCO LIQUID MEMBRANE” - Samel Sem, The Founder

The SEMCO Liquid Membrane is a single component water-based waterproofing and anti-fracture membrane. It is a self-contained elastomeric fluid suspended in a copolymer adhesive, this revolutionary blend enables easy application while providing excellent bridging, and waterproofing.

SEMCO Liquid Membrane

SUBSTRATES

  • Concrete
  • Plywood
  • Stone
  • Exterior/interior cladding
  • Residential, industrial and commercial

COVERAGE

sq ft / gallon, 2 coats

Open pore substrates25 – 50
Closed pore substrates35- 65
X-Bond Scratch Coat100 – 150

Waterproof Everything, Adhere to Everything, SEMCO Liquid Membrane Everything

Integrated chemical adhesion enables mechanical cross-linking to the applied surfaces, creating a perfect bond for long lasting protection.

→ SEE ACTIVE ADHESION IN ACTION

Low VOC waterproofing that allows you to proceed with your finish within 2 hours of application enabling a speedier project completion.

→ SEE HOW WATERPROOFING IS DONE

Up to 400% stretch and elongation providing future crack suppression for years to come. Stabilizes wood substrates to receive surface finish products.

→ SEE HOW TO REPAIR CRACKS AND CONTROL JOINTS

FEATURED PROJECTS

APPLICATION

Roller
2 coats

Paint brush
2 coats minimum

Apply at temperatures from 50°F to 90°F

Waterproofing concrete and wood substrates

Liquid Membrane is the perfect self adhering Membrane for waterproofing concrete and wood substrates. Use it for your shower, fountain, pool interior and protect it from long term water or moisture damage

* Drawing is not to scale

Repair cracks up to 1/4″ wide

Repair existing surface cracks and imperfections to ensure clean and smooth finish application.

* Drawing is not to scale

Repair control joints and cracks wider than 1/4″

Up to 400% stretch and elongation providing future crack suppression for years to come.

* Drawing is not to scale

Stabilization of existing substrates

Repair existing surface cracks and imperfections to ensure clean and smooth finish application.

* Drawing is not to scale

SPECIFICATIONS

ColorOrange (other colors available on request)
Chemical typeLatex – cross-link hybrid
Clean upSEMCO Stone Soap with water
Shelf life2 year in controlled environment (ambient temperature of 60ºF – 72ºF)
Packaging1 gal | 5 gal | 55 gal
Warranty5 year standard limited warranty, 10 year for non-traffic surfaces

DRYING / RECOAT TIME

DRYING / RECOAT TIME

Drying times are affected by temperature and relative humidity. The chart represents guidline values but each project is to be treated individually.

The chart represents the time needed in between coats at specified temperature.

CURE TIME

Curing time is affected by temperature and humidity.

For example at only 50º F, a full cure would take 10 days in comparison to at 95º F it would only take 5 days to cure.

LABORATORY TEST RESULTS

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 Strength132 PSI
ANSI 118.10 – 4-Week Shear Strength234 PSI
ASTM E96 – Water Vapor Transmission1.52 (g/hr-m2)
ASTM E96 -Water Vapor Transmission : Permeability0.135 (perm-in)
ISO 37 – Tensile Strength ( ASTM D412 ) : Maximum Stress453 PSI
ISO 37 – Tensile Strength ( ASTM D412 ) : Ultimate Elongation321 %
ASTM D42370 – Tensile Strength: Maximum Stress184 PSI
ASTM D42370 – Tensile Strength: Ultimate Elongation. → WATCH VIDEO520%

PRODUCT DATA SHEET, SAFETY DATA SHEET AND ARCHITECTURAL DETAILS

REQUEST LIQUID MEMBRANE SAMPLE KIT

Just fill out the form bellow and SEMCO will happily send you the Liquid Membrane Sample Kit at no charge. We know you will be impressed!