Groutless EZPour Epoxy 158

TERRAZZCO Groutless EZPour Epoxy 158

Durable and Decorative Epoxy Resin for Terrazzo Flooring


TERRAZZCO® Groutless EZPour Epoxy 158 is a pigmented, 100% solid (VOC free), two-component epoxy resin system. When combined with aggregates and poured in place to 1/4” or 3/8” nominal thickness, it yields a highly decorative and durable terrazzo flooring system.

Document Download
3-Part Spec for Thin-Set Epoxy Terrazzo #096623 (PDF)
3-Part Spec for Thin-Set Epoxy Terrazzo #096623 (MS Word Doc)
Product Data – Groutless EZPour Epoxy 158
Health Product Declaration (HPD) – EZPour Epoxy 158
TERRAZZCO Architectural Binder

Typical Uses of EZPour Epoxy 158

TERRAZZCO® Groutless® EZpour Epoxy 158 is perfect for almost any surface where a uniformly even, a highly durable product is desired. TERRAZZCO Groutless EZpour Epoxy 158 provides the best in aesthetic value and innovation. As a result, this epoxy terrazzo is ideal for commercial, industrial, and institutional uses.  Groutless EZpour Epoxy 158, when integrated with marble or granite aggregate resists heavy industrial wear and chemical corrosion making it perfect for pharmaceutical and chemical plants. TERRAZZCO Groutless EZpour Epoxy 158 is the superior decision for educational institutions, medical centers, sports facilities, and institutions because of its hygienic, smooth surface that is effortless to clean.


Groutless® EZpour 158 resin often contains recycled materials such as fumed silica as well as waste filler powders from the glass and mineral industry. Combine this product with locally sourced and/or recycled materials and you will have the perfect environmentally friendly flooring surface that will most likely be used for the entire life cycle of the building in which they are installed.

Advantages of EZPour Epoxy 158

  • VOC free for a healthier environment
  • Contributes to LEED® credits
  • Bacteria and Chemical Resistant
  • Up to 90% fewer pinholes than other epoxy resin products
  • Manufactured and supplied from Southeast United States
  • Lowest life-cycle costing flooring system available
  • Extensive color capabilities allow for unlimited design variations
  • Self-priming, no primer needed

Application & Technical Data

Working Data

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

Full Set Time: 18-24 hours @ 75°F

Full Cure and Maximum Performance: 5-10 days

Mix Ratio

TERRAZZCO® Groutless® EZPour Epoxy has a 5:1 ratio of Part A resin to Part B hardener.


3/8″ Epoxy Terrazzo: 45-50 square feet per mixed unit

Mixing Instructions

Premix TERRAZZCO® Groutless® EZPour Epoxy 158 resin Part A before using. Mix five (5) parts of TERRAZZCO® 158 resin part A with one (1) part of TERRAZZCO® hardener 158 Part B by volume with a slow-speed drill until liquids are completely blended. Introduce the appropriate amount of aggregate and continue to mix. For complete installation instructions, contact Concord Terrazzo Company.

Properties Results
Hardness 83.5
Tensile Strength 9,580 psi
Compressive Strength 13,260 psi
Flexural Strength 4,100 psi
Flammability self-extinguishing <.25"
Bond Strength 400 psi (100% concrete failure)
VOC Contents Zero VOCs

Groutless Epoxy

TERRAZZCO® Groutless® EZPour Epoxy 158 matrix has been formulated to cure with fewer pinholes reducing the amount of labor required in the grouting phase of any terrazzo project. This factor leads to lower labor costs and lessens the time needed to finish a terrazzo floor installation. In addition to dramatically fewer pinholes during the installation process, the terrazzo is also less likely to develop new pin holes commonly caused by regular floor maintenance during the life span of the floor.

Hanover County Court - Terrazzo Floor

 Documentation & Product Details

Epoxy Terrazzo System

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.

Packaging Details

Groutless EZPour Epoxy 158


TERRAZZCO® Groutless® EZpour Epoxy 158 resin part A is packaged in 5-gallon pails or 55-gallon drums. TERRAZZCO® Groutless® EZpour 158 hardener part B is packaged in one-gallon cans, or 5-gallon pails.

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.

Available Colors

Tinted Colors

TERRAZZCO® Groutless® EZpour Epoxy 158 can be tinted in virtually any color (white, black, gray, red, etc.). Request a custom color match with the Concord Terrazzo design team.

Clear Resin

TERRAZZCO® Groutless® EZpour Epoxy 158 can also be manufactured as a clear resin, referred to as EZPour Clear Epoxy 158C, providing even more options to suit your preferences and requirements.

Try our Green Version

Discover Groutless® EZPour Epoxy 158G, our green terrazzo version. Crafted from renewable, non-Red Listed ingredients, this eco-conscious epoxy offers architects a sustainable and innovative choice for their projects.


Groutless® EZPour Epoxy 158G ensures seamless surfaces while prioritizing sustainability, creating stunning spaces that align with eco-conscious principles.

Related Products

TERRAZZCO Flexible Membrane 528

Flexible Membrane 528


A two-component epoxy system designed to assist in the prevention of substrate cracks in an epoxy terrazzo floor.

TERRAZZCO Moisture Mitigation System 950

MMS 950


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

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.

Order materials for your next project


Get started by submitting an online request.