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GacoPoly

GacoPoly LM60AR

Cold Applied 100% Polyurethane Waterproofing Membrane

Proven Performance In Demanding Applications
GacoPoly LM60AR is a 100% solids, liquid-applied, two-component, self-leveling coating that cures into a water-resistant polyurethane elastomeric membrane. LM60AR (Acid Resistant) is designed for use in non-potable water facilities where pH is less than 6.5.

GacoPoly LM60 is easy to use — single application with a squeegee, trowel, spray, or brush. For full installation and product needs, always refer to the appropriate specification which can be found at gaco.com/documents/#specifications.

Why Choose GacoPoly Polyurethane Waterproofing Membrane Systems
Polyurethane coatings offer high resistance to water permeability and excellent adhesion to clean, dry plywood and concrete*. These characteristics are crucial for between-slab or below-grade structures where waterproofing membranes must function without maintenance for many years. GacoPoly Waterproofing membranes are also used on flat or low-sloped concrete or plywood roof decks as part of an Inverted Roof Membrane Assembly (IRMA). Once the product is applied and cured, the membrane is covered with extruded polystyrene board to provide thermal insulation and protect the membrane from damage. Additionally, GacoPoly Waterproofing Membranes provide exceptional waterproofing under soil and plants in a roof top garden. As an added bonus, GacoPoly LM60 NSF/ANSI 61 Certified, making roof water runoff safe for people, pets and wildlife.

For over 60 years, GacoPoly Polyurethane waterproofing systems have proven their reliability in challenging applications.

Partner with Gaco for waterproofing solutions, such as GacoPoly LM60, and you get far more than a bucket or pail of high-quality, high-performing material. You get a team of highly-skilled, technical experts who combine years of innovative technology with boots-on-the-ground experience to bring you the solutions you need. Find LM60 near you or contact your local Gaco Area Manager with questions.

Benefits

    • QUICK AND EASY TO APPLY. Use GacoPoly LM60 to waterproof concrete, metal, and plywood in a single application with a squeegee, trowel, or brush. It requires minimal prep work and doesn’t need reinforcement, making the installation process straightforward.
    • CREATES A MONOLITHIC WATERPROOF MEMBRANE. Your structure will receive a seamless, impermeable elastomeric membrane, protecting it from water damage.
    • LOW ODOR. Ideal for indoor or high pedestrian traffic environments, minimizing disruptions during application.
    • SOLVENT-FREE AND 100% POLYURETHANE TECHNOLOGY. 100% polyurethanes don’t lose wet film thickness (“WFT”) and dry film thickness (“DFT”).
    • COLD APPLIED. There is far less room for error when using cold-applied, liquid waterproofing membranes than hot-applied rubberized asphalts. Less skill is required, and there is a significantly lower chance of moisture evaporation that can cause blistering or pinholes during the installation.
    • PROVEN TRACK RECORD. For over 60 years, LM60 products have proven their reliability in challenging applications.

      BACKED BY GACO. Gaco offers a material and labor warranty for up to 20 years on GacoFlex LM60 liquid membrane systems when applied according to specifications.

      Versatile Applications

        • BETWEEN-SLAB OR BELOW-GRADE STRUCTURES. It’s challenging to reliably waterproof below-grade structures. Buildings can move, undergo fatigue cycles, and expand and contract. Maintaining waterproofing integrity is difficult, especially in cold temperatures.

          However, GacoPoly LM60 does not shrink or crack and has proven its reliability time and time again, even in challenging applications. LM60 can sustain 300% elongation (ASTM D412) and it’s rated at -50 °F (-45 °C) for a low temperature brittleness (ASTM D746).

        • IRMA ROOFING SYSTEMS. LM60 is ideal for waterproofing flat or low-sloped concrete or plywood roof decks as a part of an Inverted Roof Membrane Assembly (“IRMA”), also known as an “upside down” roof. First, LM60 is applied to the concrete and allowed to cure. Then, polystyrene boards are placed over the membrane to protect it and provide thermal insulation, followed by a layer of filter fabric and ballast rock or concrete pavers to hold it all in place. 
        • VEGETATIVE ROOFS/GARDEN ROOFS.Vegetative roofs help keep your building cool and are environmentally friendly. They help control stormwater run-off and make attractive outdoor amenity spaces. But, not every waterproofing coating is safe for biodiversity.
        • TANKS, PLANTERS, AND PODIUM DECKS. Use LM60 for horizontal and vertical waterproofing of unique structures such as tanks, planters, and podium decks, and better managing the flow of water around them.
Filter icon Filter Results
GacoPoly Standard Color Chart April 1st, 2026 Product: GacoPoly FastPass Additional Information
PDS - GACOFLEX™ LM60AR - LIQUID-APPLIED POLYURETHANE MEMBRANE (ACID-RESISTANT) April 15th, 2024 Product: GacoPoly LM60AR Product Data Sheets
Gaco Safety Data Sheet (SDS) - Alternate Access April 2nd, 2024 Product: Gaco 052N Safety Data Sheets
Gaco - Waterproofing Warranty - 5006 - SAMPLE December 30th, 2020 Product: GacoPoly LM60 Additional Information