MM-80 is a 100% solids, two component, heavy duty semi-rigid epoxy joint filler designed to fill and protect contraction and construction joints in industrial concrete floors. The industry’s first semi-rigid joint filler and still widely known as the “industry standard” in floor joint protection.
Basic Use: MM-80 was developed to fill and protect joints in industrial concrete floors that are subject to hand 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 temperature are from 40° F(10C) to 120° F (49°C). It is also ideal for joints and cracks repair.
MM-80 is a two –component, 100% solids content epoxy joint filter. When cured, MM-80 is a gray, semi-rigid (hard but slightly resilient) filter with a share hardness of A90-95 and D D50-55.
Shore A Hardness: A90-95
Our industrial and polished concrete floor joint fillers and repair and maintenance products have been setting the standard in our industry for decades. We have products that will protect and repair joints, cracks, surface defects, gouges, bolt holes and more.
Limitations : MM-80 is not designed for use in
MM-80 should be installed full joint depth in saw-cut control joints (or 2” minimum 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).
There are no government or ASTM standard floor joint filters.
MM-80 meets and/or exceeds the floor joint filter guidelines set forth by ACI 302 (Guide for Concrete Floor and Slab Construction, ACI report 302.1 R-96), ACI 360 and PCA (Concrete Floors on Ground, Third Edition 2001, James A. Farny, PCA).
|HARDNESS, SHORE “A” @ 70˚F||D-2240||A90-95|
|TENSILE STRENGTH||D-638||1300 PSI|
|TENSILE ELONGATION*(@ 70˚F)||D-638||45-55%|
|ADHESION TO CONCRETE||D-4541||300-350 PSI|
|POT LIFE @ 70˚F||-||15-30 MINS.|
|NITIAL CURE @ 70˚F||-||6-8 HOURS|
|LIGHT TRAFFIC READY @ 70˚ F||-||6-8 HOURS|
|FULL TRAFFIC READY @ 70˚ F||-||8-12 HOURS|
|MIX RATIO (by volume)||-||5:1|
|MIX RATIO (by weight)||-||100:15|
MM-80's superior formulation yields sufficient rigidity to support loads crossing joints, protecting edges from spalling, 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.
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
Once cured, MM-80 is basically maintenance free. If joints should open after installation due to concrete shrinkage, fill any voids exceeding credit card width with additional MM-80 or M/M's Spal-Pro RS 88. Refer to Joint Filler Tech Series Sheet T-5 for additional information on joint filler separation and its causes and corrections.
This product is for industrial use only. Use only in well ventilated areas. Practice all normal jobsite safety precautions (clear work area, etc). Thoroughly read and understand MSDS and installation instructions for additional information prior to using material