TERRAZZCO Flexible Membrane 528




TERRAZZCO® Floor Aid Flexible Membrane FM 528 is a 100% solids (VOC free), two-component epoxy resin system applied to concrete in order to assist with the prevention of substrate cracks transferring through to the finish floor system due to horizontal movement. When used in combination with TERRAZZCO® EZPour Epoxy 158 resin floor system FM 528 provides a crack resistant, resilient, and durable floor.


TERRAZZCO® Floor Aid FM 528 can be used in industrial, commercial, retail, institutional facilities and healthcare facilities. When combined with TERRAZZCO EZPour Epoxy 158, it yields a flexible yet durable epoxy terrazzo flooring finish that is less susceptible to cracking than traditional flooring systems.


  • Crack-resistant, flexible yet durable
  • Lowers lifetime maintenance costs
  • Reduces noise created by mechanical vibrations
  • Packaged and premeasured for easy mixing at worksites
  • Manufactured and supplied from the Southeast United States
  • Resin is GREENGUARD and GREENGUARD Gold certified


TERRAZZCO® Floor Aid Flexible Membrane 528 resin part A is packaged in a 3.5 gallon pail container premeasured to contain 2 gallons of material. TERRAZZCO® Floor Aid Membrane 528 hardener part B is packaged in one-gallon cans. This allows for easy mixing at the work site by emptying the entire contents of the hardener part B into the resin part A and mixing them in the 3.5-gallon pail container.


Self Life: Epoxy resin does not have a shelf life and hardener has a 1-year shelf life in unopened containers.


Storage Conditions: It is suggested that materials are stored in a temperature and humidity controlled environment. If this is not possible materials should be allowed to acclimate to controlled environmental conditions of application. Keep resins and hardeners separated from each other until ready for use. Materials should be kept away from sources of ignition. Materials should be stored in their original unopened container.


VOC Contents: Zero VOCs


Shipping: Available in the United States and Worldwide. Contact Sales for Quotes.


Lead Time: 2-4 Weeks or Less for Materials


Tensile Strength: 1,200 psi


Elongation at Break: 120-170%


Adhesion: 300 psi (concrete failure)


Hardness Shore A: 70-80

Epoxy Terrazzo Floor


TERRAZZCO Flexible Membrane 528 has a 2:1 ratio of Part A resin to Part B hardener.


Working (Pot) Life: 40-50 minutes @ 75­°F


Re-Coat Time: 6-8 hours @ 75°F


Full Set Time: 12-16 hours @ 75°F


Full Cure and Maximum Performance: 5-10 days

Flexible Membrane


1. Premix FM 528 resin part A using a low-speed drill and jiffy blade for two to three minutes.


2. Add two (2) parts FM 528 resin part A to one (1) part FM 528 hardener part B by volume. Mix using the drill and jiffy blade for two to three minutes. Materials are supplied packaged so that the entire contents of hardener part B is added to the container of resin part A and mixed in the container.


3. Pour the mixed material onto the working area and spread using a squeegee or trowel to achieve 40 mils dry film thickness yielding 105-135 sq. ft. per unit. Apply more material to areas showing greater penetration and soaking into the substrate

Technical Data and Specifications


Greenguard Certification


Other Guides

Browse our entire selection of epoxy resin systems. For more information, click the product name.

  • MMS 950 is required when relative humidity (RH) within the concrete substrate exceeds 75% when tested with in-situ probes.  MMS 950 should be applied to cracks prior to those cracks being filled with rigid epoxy.


  • Floor Aid Flexible Membrane 528 should be used to treat all cracks, control joints & cold pour joints in the substrate. (Do not fill cracks with Flexible Membrane 528.  Rigid epoxy such as  Groutless EZPour Epoxy 158 or Leveling Fill Epoxy 162 should be used)


  • Leveling Fill Epoxy 162 may be required to fill any cracks, voids and/or if leveling is needed.


TERRAZZCO EZPour Epoxy 158



A pigmented, 100% solid (VOC free), 2-part epoxy resin system. Combined with aggregates, it yields a decorative and durable terrazzo floor.


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TERRAZZCO Moisture Mitigation System 950



A two-component epoxy resin system providing a barrier against moisture vapor mitigation of concrete.


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TERRAZZCO Joint Filler



A two-component flexible epoxy joint filler that absorbs the impact and shock of heavy loads while sealing joints encountered in terrazzo.


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TERRAZZCO Leveling Fill Epoxy



TERRAZZCO Leveling Fill Epoxy is a two-component epoxy resin system applied by trowel to the desired thickness.


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TERRAZZCO Bonding Agent



TERRAZZCO Bonding Agent is designed to promote adhesion between concrete and cement-based terrazzo flooring.


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