Metzger/McGuire MM‑80 Semi‑Rigid Epoxy Joint Filler, Standard Gray

MM-80 is a two-component, 100% solids content epoxy joint filler designed to fill, protect, and repair joints and cracks in industrial concrete floors that are subject to hard, heavy wheeled traffic from carts, forklifts, and other vehicles handling heavy loads.

MM-80 is designed for use in areas where final temperatures are from 40°F (10°C) to +120°F(49°C). 

When cured, MM-80 is a gray, semi-rigid (hard but slightly resilient) filler with a Shore hardness of A90-95. It yields sufficient rigidity to support loads crossing joints, protecting edges from spalling. It also offers sufficient resiliency to prevent brittleness throughout the floor’s life.

MM-80 exhibits low range tensile and adhesive strengths, which are characteristics necessary to allow the joints to open as the concrete shrinkage progresses.

MM-80 is the joint filler upon which ACI and PCA standards are based.

MM-80 is not designed for use in:

• True expansion/isolation joints
• Exterior joints (paving, etc.)
• Joints exposed to extreme chemical exposure
• Joints under VCT/seamless floor coverings (in most settings)As with most semi-rigid joint fillers, MM-80 may discolor if subjected to UV rays from certain types of lighting systems.

USDA/FDA/CFIA/LEED® Acceptability

MM-80 is acceptable for use in floors subject to inspection/regulation by USDA/FDA and Environment Canada/CFIA. MM-80 contains no VOC’s and fully complies with all LEED® green building standards.