COMPANY HEADER
Request Information
Composition
MM-80 is a two-component, 100% solids content epoxy joint filler. When cured, MM-80 is a gray, semi-rigid (hard but slightly resilient) filler with a Shore hardness of A90-95.

Related Products
MM-80 is available in two versions; MM-80 with the original 5:1 ratio, used primarily for manual dispensing, and MM-80P, with a 1:1 mix ratio, intended for use in dual-component mechanized pumps.

Basic Use
MM-80 was developed to fill and protect joints in industrial concrete floors that are subject to hard wheeled material handling traffic and heavy loads. Its primary function is to support such traffic and protect joint edges. MM-80 is designed for use in areas where final temperatures are from 40 ºF (10 ºC) to +120 ºF (49 ºC). It is also ideal for joint and crack repair.
Unit of Measure

Specifications

Hardness, Shore "A" at 70 ºF

 N/A A90-95

Tensile Strength

 N/A 1300 psi
Tensile Elongation at 70 ºF1
N/A 45 to 55 %

Adhesion to Concrete

 N/A 300 to 350 psi

Pot Life at 70 ºF

 N/A 15 to 30 m

Initial Cure at 70 ºF

 N/A 6 to 8 h

Light Traffic Ready at 70 ºF

 N/A 6 to 8 h

Full Traffic Ready at 70 ºF

 N/A 8 to 12 h

Mix Ratio (by Volume)

 N/A 5:1

Mix Ratio (by Weight)

 N/A 100:15

Solids Content

 N/A 100 %

Shrinkage

 N/A Negligible

Limitations

Limitations

 N/A 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.

Correct Joint Design/Installation

Correct Joint Design/Installation

 N/A MM-80 should be installed full joint depth in saw-cut control joints (or 2" min. in joints where depth exceeds 2") per PCA and ACI guidelines. In construction (formed) joints that are not saw-cut, MM-80 should be installed 2" deep. If shrinkage crack is excessive and needs to be "choked off," it may be sealed with clean, dry silica sand as shown below (contractor's option).

Color and Packaging

Color and Packaging

 N/A Standard color is medium gray. MM-80 can be custom colored. Contact Motzger/McGuiro for details.

MM-80 is available in 1 gal. (US), 5 gal. (US) and 30 gal. (US) kits.

Applicable Specifications

Applicable Specifications

 N/A There are no government or ASTM standards for floor joint fillers. MM-80 meets and/or exceeds the floor joint filler guidelines set forth by the American Concrete Institute (302.1 R-04 Guide for Concrete Floor and Slab Construction, ACI Committee 302 ), ACI 360 and PCA (Concrete Floors on Ground, Third Edition 2001, James A. Farny, PCA).

Advantages

Advantages

 N/A MM-80's superior formulation yields sufficient rigidity to support loads crossing joints, protecting edges from spoiling, and sufficient resiliency to prevent brittleness throughout the floor's life.

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

MM-80's relative hardness has been gradually increased through the years to reflect increasing demands on floors created by heavier loads and smaller, harder vehicle wheels.

MM-80 is the joint filler upon which ACI and PCA standards are based. You can specify and use MM-80 with the confidence that comes from a project-proven track record of more than thirty years and with the knowledge that you are relying on the best floor joint protection available in the industry.

USDA/FDA/CFIA/LEED® Acceptability

USDA/FDA/CFIA/LEED® Acceptability

 N/A 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.
  • 1 This property provided only for companion with other fillers. Elongation does not directly correlate to lateral expansion capability.