Installation Guide

DESCRIPTION
MAPEI SM Primer is a ready-to-use, fast-drying, water-based, latex primer
for use under MAPEI’s peel-and-stick sheet membranes on residential and
commercial indoor or outdoor floors. MAPEI SM Primer greatly increases the
bond of MAPEI’s peel-and-stick sheet membranes to concrete, plywood and
other approved, properly prepared floors. It can be applied with a roller or
brush, is white in color and dries clear.
FEATURES AND BENEFITS
• Fully compatible with MAPEI’s peel-and-stick sheet membranes
• Easy to apply with roller or brush
• High coverage rate, for economical installation
• Fast-drying, allowing sheet membrane installation after about 15 minutes
• Dries clear, so that layout lines remain visible after application
• Bonds to a variety of substrates
INDUSTRY STANDARDS AND APPROVALS
LEED v4 Points Contribution LEED Points
Health Product Declaration (HPD)* ..............................................Up to 2 points
* Using this product may help contribute to LEED certification of projects in the
category shown above. Points are awarded based on contributions of all project
materials.
Additional Green Certifications
• CRI Green Label Plus #GLP54548. Refer to the CRI’s Website at
www.carpet-rug.org for additional information.
• Living Building Challenge (LBC) Red List Free: This product has been
verified per the most current Red List on the LBC’s Website.
WHERE TO USE
• MAPEI SM Primer is required when installing MAPEI’s peel-and-stick sheet
membranes.
• For specific uses, see individual Technical Data Sheets (TDSs) for MAPEI
peel-and-stick sheet membranes.
LIMITATIONS
• Do not apply to substrates containing asbestos.
• Do not dilute with any other liquid.
• For specific limitations, see individual TDSs for MAPEI peel-and-stick
sheet membranes.
• Not for use: over substrates subject to hydrostatic pressure or moisture
content in excess of 5 lbs. per 1,000 sq. ft. (2,27 kg per 92,9 m
2
) per
24 hours using a calcium chloride test kit; over cracks subject to “out-
of-plane” vertical movement; where floor movement is greater than 3/8"
(10 mm); over expansion or control joints; or in areas of prolonged water
immersion (such as swimming pools, spas, steam rooms, gang showers,
hot tubs and fountains).
SUITABLE SUBSTRATES
• Concrete (cured at least 28 days)
• Cement mortar beds and indoor leveling coats
• Cement backer units (CBUs) – see manufacturer’s installation guidelines
Water-Based Primer for
MAPEI Peel-and-Stick
Membranes
MAPEI
SM Prime
r
™
MAPEI
SM Primer
™
Version: Jan. 30, 2018