About SEMCO / Since 1991
Pro-grade surfaces. Made for you to apply.
SEMCO started in Las Vegas in 1991, cleaning concrete driveways. Today SEMCO Modern Seamless Surface engineers products for floors, walls, decks and waterproofing on hospitality, industrial, commercial, public and residential projects worldwide.
SEMCOworks is how we bring those professional-grade products straight to you.
- 1991
- founded in Las Vegas
- 35
- years of surface engineering
- 4.8★
- from 1447 verified reviews
01 / Our story
From driveways to the world.
Every product in this store started on a real job.
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1991
The humble start in Las Vegas
SEMCO Surfaces was founded in Las Vegas in 1991, cleaning concrete driveways with our own detergents: Nu-Lift, Stone Soap and Power Cleaner. They're still the first step of every SEMCO job.
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1999
Color, sealers and the world
Over the next eight years we developed our own water-based concrete stain and water-based urethane sealers, for fast remodels at Las Vegas resorts. In 1999 we expanded internationally into Australia, South Korea and Japan.
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Today
SEMCOworks, direct to you
Three decades of hospitality, industrial, commercial, public and residential projects, with offices around the world. SEMCOworks brings the same professional-grade products straight to homeowners and contractors.
02 / What we stand for
Four things we won't change.
Pro-grade, built to DIY
The products we've supplied to resorts and commercial jobs for decades, made simple enough to apply yourself. No primer, no mixing, soap-and-water cleanup.
Proof over promises
We publish the numbers: shear bond, elongation, VOC content. If a claim can't be backed by a test, we don't make it.
Made in the USA
Our products are made in the USA, by a company that has been engineering surfaces since 1991.
One system
Cleaners, membrane, color and sealers are made to work together, so the prep, the coat and the finish all bond.
03 / Proof, not promises
Tested. Not talked up.
SEMCO Liquid Membrane, our flagship, by the numbers.
- 234 PSI
- Shear bond · 4 weeks173 PSI at 7 days, building to 234 PSI at four weeks (ANSI A118.10).
- 1,300%
- ElongationStretches to bridge cracks a rigid coating would split across.
- 14 g/L
- Low VOCWater-based and low odor, for basements, showers and crawl spaces.
- 5 / 10 yr
- Limited warrantyFive years standard, ten years on non-traffic surfaces.
04 / Worldwide
Big projects. Your project.
For more than three decades SEMCO has developed, manufactured and installed surface materials for major projects around the world, and designed custom surface solutions for clients of every size.
Every product in this store comes from that work.
Projects
- Hospitality
- Industrial
- Commercial
- Public
- Residential
Offices
- United States
- Australia
- New Zealand
- Europe
- China
- Japan
- Spain
- Mexico
- Puerto Rico
- Cambodia
05 / The SEMCO system
What we make. How it fits.
Four product families that are made to work together, so the prep, the coat and the finish all bond.
Prep
Every job starts clean. Nu-Lift, Stone Soap or Power Cleaner, chosen by your surface.
Waterproof
One flexible, water-based membrane for walls, roofs, decks, showers and pools.
Color
A water-based stain for concrete and masonry. No acid to mix, neutralize or rinse.
Seal
A wear coat for surfaces that take traffic: high gloss, matte, or an invisible penetrating seal.
Waterproofing a wall or roof? Prep, then membrane. Coloring concrete? Prep, then PreStain. Seal either one if it takes foot or vehicle traffic.
06 / Customer reviews
Real projects. Real reviews.
07 / Talk to us
Got a project? Ask the team.
FAQs
Coverage, cure, prep and colors, answered in one place.
Read the FAQsApplication guide
Prep, coats, drying and cure, step by step.
Open the guideColor chart
15 membrane colors, from Semi-Clear to SEMCO Orange.
See the colorsTalk to us
Not sure which kit or prep fits your job? Ask the team.
Contact us