TERRAZZCO Flexible Membrane 528

TERRAZZCO Flexible Membrane 528

A crack-resistant and resilient terrazzo flooring system


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.

Typical Uses of Floor Aid Flexible Membrane 528

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.

Advantages of Flexible Membrane 528

  • 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 container premeasured to contain 1 unit of part A, and TERRAZZCO® Floor Aid Flexible Membrane 528 hardener part B is packaged in a one-gallon container premeasured to contain 1 unit of part B. 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.

Product Information

Self Life: Epoxy resin system has a 1-year shelf life from the date of manufacture.


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 North America. Contact Sales for Quote.

Technical Information

Tensile Strength: 1,200 psi


Elongation at Break: 120-170%


Adhesion: 300 psi (concrete failure)


Hardness Shore A: 70-80

Mixing Ratio

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

Working Data

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

TERRAZZCO Floor Aid Flexible Membrane 528

Mixing Instructions

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


2. For one unit Flexible Membrane 528 (A+B) add one unit Flexible Membrane 528 hardener (part B) to one unit Flexible Membrane 528 resin (part A). 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 100-130 sq. ft. per unit. Apply more material to areas showing greater penetration and soaking into the substrate.

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 Terrazzo Product

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

Moisture Mitigation System


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


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TERRAZZCO Joint Filler 1200

Flexa-Flex 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 162

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 159

Bonding Agent


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


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