September 26, 2022
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
Concrete
Plywood
Stone
Exterior/interior cladding
Residential, industrial and commercial
sq ft / gallon, 2 coats @ 15 mil per coat
Open pore substrates
Closed pore substrates
X-Bond Scratch Coat
Integrated chemical adhesion enables mechanical cross-linking to the applied surfaces, creating a perfect bond for long lasting protection.
Low VOC waterproofing that allows you to proceed with your finish within 2 hours of application enabling a speedier project completion.
Up to 1,300% stretch and elongation providing future crack suppression for years to come. Stabilizes wood substrates to receive surface finish products.
2 coats
2 coats minimum
Apply at temperatures from 50°F to 90°F
Basement waterproofing problems: with rain or from other sources such as irrigation or condensation, moisture can creep into your basement through your foundation walls or concrete ground slab.
Waterproofing failures can cause the following problems:
SEMCO 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
SEMCO’s Liquid Membrane™ is a single component waterproofing and anti-fracture membrane. When combined with SEMCO’s X-Bond Seamless Stone, two-stage waterproofing is achieved, enabling single source protection.
Repair existing surface cracks and imperfections to ensure clean and smooth finish application.
* Drawing is not to scale
Up to 400% stretch and elongation providing future crack suppression for years to come.
* Drawing is not to scale
Apply X-Bond Liquid and Scratch Coat to the deteriorating and crumbling surfaces in order to solidify it.
* Drawing is not to scale
Orange (other colors available on request)
Latex – cross-link hybrid
SEMCO Stone Soap with water
2 year in controlled environment (ambient temperature of 60ºF – 72ºF)
1 gal | 5 gal | 55 gal
5 year standard limited warranty, 10 year for non-traffic surfaces
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.
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.
ANSI 118.10 – Breaking Strength ( ASTM D751, Procedure B )
ANSI 118.10 – Dimensional Stability ( ASTM D1204 )
ANSI 118.10 – 7-Day Shear Strength ( ASTM C482-9.8)
ANSI 118.10 – 7-Day Water Immersion Shear Strength
ANSI 118.10 – 4-Week Shear Strength
ASTM E96 – Water Vapor Transmission
ASTM E96 -Water Vapor Transmission : Permeability
ISO 37 – Tensile Strength ( ASTM D412 ) : Maximum Stress
ISO 37 – Tensile Strength ( ASTM D412 ) : Ultimate Elongation
ASTM D42370 – Tensile Strength: Maximum Stress
ASTM D42370 – Tensile Strength: Ultimate Elongation. → WATCH VIDEO
AS 4858.1 Appendix A : Elongation at Break
AS 4858.1 Appendix A : Stability of Membrane Water Immersion
AS 3558.1 : Water Absorption
AMTM004 : Temperature Resistance
HOW : Apply minium 2 coats of SEMCO Liquid Membrane™ to achieve a thickness of at least 30 mil to retard future reoccurrence of crack. 30 min at 70 °F between coats
PURPOSE : Repair process will aid lessening the chance for a crack to reform
HOW : Roll or brush SEMCO Liquid Membrane™ inside the crack. ALLOW IT TO DRY. Roll X-Bond Liquid as a primer coat. DO NOT ALLOW IT TO DRY. Apply X-Bond mixture (1 part X-Bond Liquid : 3 parts X-Bond Stone) to fill up the cracks. ALLOW MIXTURE TO DRY. ONCE DRY roll 2 coats of SEMCO Liquid Membrane™ to achieve a thickness of at least 30 mil to prevent future reoccurrence of crack. 30 min at 70 °F between coats
PURPOSE : Repair process will aid lessening the chance for a crack to reform
STEP 1
HOW : Roll or brush SEMCO Liquid Membrane™ inside the crack. ALLOW IT TO DRY. Roll X-Bond Liquid as a primer coat. DO NOT ALLOW IT TO DRY. Apply X-Bond mixture* to fill up the cracks. ALLOW MIXTURE* TO DRY. ONCE DRY roll 1 coat of SEMCO Liquid Membrane™. While still wet imbed 6” wide anti-fracture fabric to surface, and immediately roll an additional 2 coats of SEMCO Liquid Membrane™ to fully encapsulate Fabric Reinforcement.
PURPOSE : Repair process will aid lessening the chance for a crack to reform
HOW : When applying the next line of anti-fracture fabric overlap the new sheet over the existing sheet a minimum of 2”
PURPOSE : Creates a single surface to deter future reopening
HOW : Allow surface to dry and proceed to X-Bond Ensures there are no imprints and the surface is Brown Coat
PURPOSE : Ensures there are no imprints and the surface is Brown Coat ready to receive the next step
HOW : Sweep debris off of surface and loose surface
PURPOSE : Ensure proper bond to substrate
HOW :Use a 1/2 nap roller. Allow any pre-treated areas to dry to the touch. Apply a generous coat of SEMCO Liquid Membrane™ with brush or roller over substrate including pre-treated areas. Apply another generous coat of SEMCO Liquid Membrane™ over the first coat of SEMCO Liquid Membrane™. Let topcoat dry to the touch, approximately 1–2 hours at 70 °F (21 °C) and 50% RH. When last coat has dried to the touch, inspect final surface for pinholes, voids, thin spots or other defects. SEMCO Liquid Membrane™ will dry to bright orange color when it’s dry to touch. Use additional SEMCO Liquid Membrane™ to seal the defects. Required thickness is 30 mil
PURPOSE : Suitable of all sizes of installations, and ensures best performance of the SEMCO Liquid Membrane™
HOW : The sprayer being used for the application of SEMCO Liquid Membrane™ should be capable of producing a mini- mum of 2,500 psi (17.2), maximum of 3,300 psi (22.8 MPa) with a flow rate of 0.95 to 1.6 GPM (3.6 to 6.0 LPM) using a 0.521 or a 0.631 reversible tip. Keep the unit filled with SEMCO Liquid Membrane™ to ensure con- tinuous application of liquid. The hose length should not exceed 100’ (30 m) in length and 3/8” (9 mm) in diameter.
Required thickness is 30 mil
PURPOSE : Reserved for exceptionally large areas, and ensures best performance of the SEMCO Liquid Membrane™
For deteriorating and crumbling surfaces we recommend to prime the entire surface with X-Bond Liquid first and then apply a scratch coat additionally. The reason for this is : The X-Bond Liquid will solidify the surface and the Scratch Coat will give the SEMCO Liquid Membrane™ the optimal surface to bond to.
Scan QR Code to watch our application instruction step by step for a successful install or by clicking on this link !
The SEMCO Liquid Membrane™ is a single component 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™ creates a continuous waterproof membrane barrier with outstanding adhesion and reduces crack transmission in tile, concrete and stone floors.
SEMCO Liquid Membrane™ can be applied with a paintbrush or roller on to the surface. 2 coats are required for optimal performance.
SEMCO 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.
Yes, SEMCO Liquid Membrane™ has undergone the following tests:
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
ASTM E96 – Water Vapor Transmission 1.52 (g/hr-m2)
ASTM E96 -Water Vapor Transmission : Permeability 0.135 (perm-in)
ISO 37 – Tensile Strength ( ASTM D412 ) : Maximum Stress 390 PSI
ISO 37 – Tensile Strength ( ASTM D412 ) : Ultimate Elongation 400%
For cracks up to 1/4” wide you must fill the crack first with X-Bond mixture before applying the SEMCO Liquid Membrane™ over it.
For cracks wider than 1/4” or control joints, apply SEMCO Liquid Membrane™ first into the crack or control joint, fill it up and then apply another coat of SEMCO Liquid Membrane™ followed by fabric reinforcement and put a second coat of SEMCO Liquid Membrane™ over the fabric for maximum adhesion.
Yes! The surface of the pool shell must be clean. This step is often overlooked and can lead to problems. The first step is to remove any surface contamination left from the placement of the concrete such as form release agents, laitance (the weak, powdery cement fines which can appear on the surface of a poured, vibrated concrete wall), dust, dirt, oil, paint, concrete sealers, and curing compounds or any other material that can act as a bond inhibitor.
sq ft/gallon @ 2 coats
Open pore substrates 25 – 50
Closed pore substrates 35 – 65
X-Bond Scratch Coat 100 – 150
