Compare RedGard to SEMCO Liquid Membrane for Waterproofing and Crack Prevention

Two products that standout are RedGard Waterproofing and Semco Liquid Membrane. Here’s some highlights and perspective from Contractors in the field using them.

Compare RedGard to SEMCO Liquid Membrane for Waterproofing and Crack Prevention

Published: by SEMCO FL

Let’s compare RedGard Waterproofing to SEMCO Liquid Membrane

When it comes to waterproofing products, reliability cost-effectiveness and performance are paramount. As a seasoned contractor with years of experience in the field, I’ve had the opportunity to work with various brands and formulations. Two products that often find themselves in the spotlight are RedGard waterproofing and Semco Liquid Membrane. Let’s take a closer look at these contenders and see how they measure up against each other.

RedGard and SEMCO Liquid Membrane from Contractors Feedback

First and foremost, it’s essential to evaluate the fundamental aspects of any waterproofing product: bond strength, elasticity, and waterproofness.

In these areas, both RedGard and Semco Liquid Membrane showcase commendable performance. They both form strong bonds with substrates, ensuring a secure and durable seal against water intrusion. Additionally, their elasticity allows them to flex with substrate movement, minimizing the risk of cracks and leaks. Furthermore, their waterproof properties provide reliable protection against moisture, safeguarding structures from potential damage.

However, where SEMCO’s Liquid Membrane truly shines is in its additional features that enhance user experience and project efficiency. One notable advantage of Semco is its lack of odor. In the RedGard documentation it states that it, “may cause nose, throat and lung irritation.” This odor comes from acrylics and styrene-butadiene polymer. As someone who values a comfortable working environment, I appreciate the absence of strong chemical smells that can linger during and after application. This not only makes the work more pleasant but also minimizes disruption in indoor settings where ventilation may be limited and customers can be picky about odors.

Semco Liquid Membrane Product Multiple Colors Comes in 1 or 5 Gallons

Semco Liquid Membrane takes safety a step further by being less of an irritant to the skin and eyes compared to RedGard

The RedGard documentation recommends safety glasses with side shields or goggles as well as chemical-resistant gloves.


The Semco documentation states that no special measures for skin and eyes are necessary.

As a contractor, protecting my team’s health and well-being is of utmost importance. With Semco, I have peace of mind knowing that my crew can work without the discomfort and potential hazards associated with prolonged exposure to harsh chemicals.

SEMCO Liquid Membrane

Bonus Tip: SEMCO Liquid Waterproofing Membrane comes in a variety of colors, allowing you to seamlessly blend waterproofing with aesthetics. Choose from classic options like black and white, or add a touch of personality with Cove Blue or Sandy Beige.

crack suppression membrane, waterproofing membrane, semco liquid membrane, redgard, redgard waterproofing

In addition to its user-friendly attributes, Semco Liquid Membrane offers a significant advantage in terms of coverage rate.

Compared to RedGard (55 sq ft per gallon for waterproofing),  Semco typically provides around four times better coverage per bucket (175-200 sq ft per gallon).

So RedGard’s standard 3.5 gallon bucket will provide 192.5 sq ft of coverage where the Semco Liquid Membrane 5 gallon bucket will provide 800-1000 sq ft of coverage.

This translates to fewer product purchases and reduced application time, ultimately saving both time and money for contractors and homeowners alike.

In conclusion, while both RedGard waterproofing and Semco Liquid Membrane deliver reliable performance in terms of bond strength, elasticity, and waterproofness, Semco stands out as the superior choice due to its additional benefits.

With its odorless formulation, reduced irritant properties, and exceptional coverage rate, Semco Liquid Membrane offers a more pleasant and efficient waterproofing solution. As a contractor who values quality, efficiency, and safety, Semco has earned my trust and recommendation for projects of all sizes.

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SEMCO Florida Innovative seamless surfaces since 1991. We specialize in providing seamless surface solutions for residential, commercial and industrial uses worldwide.

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Tags: crack suppression membrane, waterproofing membrane, semco liquid membrane, redgard, redgard waterproofing, redgard alternative

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