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FX-523 Flexibilized Epoxy Adhesive

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FX-523 Flexibilized Epoxy Adhesive is a two-component, 100% solids, thixotropic, flexible, non-sag adhesive formulated to bond common construction materials.

CSI Specification

03 01 00 Maintenance of Concrete

Key Features

  • Remains flexible
  • Thixotropic gel
  • Suitable for saltwater marine applications
  • Maintains flexibility after short-term exposure to extreme temperatures: -20°F (-29°C) to 300°F (149°C)
  • Easily applied by trowel or putty knife


  • To bond spacers to FX‑70® fiberglass jackets
  • To bond common construction materials
  • Wherever both adhesion and flexibility are required
  • To bond dissimilar materials


231 in.3/US gallon (0.001 m3/L)


Light Gray

Mixing Ratio

1A:1B by volume

Storage Conditions

Store dry between 40° and 95°F (4°–35°C)

Shelf Life

2 years in unopened packaging


60 g/L (mixed)


2 US quart (1.9 L) kit (FX523KT2QT) consists of:

  • 1 US quart (0.9 L) can of Component “A” (FX523-1QTA)
  • 1 US quart (0.9 L) can of Component “B” (FX523-1QTB)

2 US gallon (7.6 L) kit (FX523KT2) consists of:

  • 1 US gallon (3.8 L) can of Component “A” (FX523-1A)
  • 1 US gallon (3.8 L) can of Component “B” (FX523-1B)
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