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(CSM 90) SGM Sound Control and Anti-Fracture Membrane System is a self-adhering “peel-and-stick” membrane. CSM 90 consists of a base layer of polymer modified elastomers permanently laminated to a unique “stress flex” fiber sheet to form a single, high performance, self-bonding membrane over which ceramic tile or dimension stone can be installed immediately after placement with a latex-modified Portland cement mortar.
Poured concrete, pre-stressed, and pre-cast concrete. Concrete backer board, mud beds, gypsum, lightweight concrete, and patching compounds.
Surfaces must be level, structurally sound, and meet 1/360 for ceramic and porcelain tile or 1/720 for stone tile on live or dead loads. Grind bumps and level slab depressions with quality latex underlayment in accordance with manufacturer’s instructions. Surfaces must be free of holes, projections, moisture, or bond breakers. Scarify smooth surfaces. Maximum variation of ¼ inch in ten (10) feet from the required plane. Ensure joist spacing of no more than sixteen (16) inches on-center and a double sub-floor consisting of minimum ? inch sheets of exterior grade plywood. Perform Black Mat MVT (Moisture Vapor Transmission) test. If MVT is present, conduct ASTM F-1869-98 test for emissions. Contact SGM for instructions if MVT drive is in excess of 10#/1000SF/24HRS. Apply cementitious parge coat to concrete block and allow to cure before installation. Apply Southcrete™ 25 Acrylic Mortar Admix to highly porous surfaces such as mud beds, gypsum / gypcrete, lightweight concrete, and patching / leveling compounds. Allow Southcrete™ 25 Acrylic Mortar Admix to cure 24 hours prior to applying Primer. Some backer boards are not suitable for vertical CSM application. A successful overnight Pull Test is required. All installations begin with a clean, dry floor. Substrates must be well adhered to and clean of wax, petroleum sealers, dirt, grease, oil, or other bond-breakers. Recommended for installations under latex-modified thin-bed and medium- bed mortar installations (ANSI 118.4) of ceramic, porcelain, stone, slate, marble, and granite tiles. Also for use under brick, pavers, hardwood, and manufactured wood. Also ideal for use with radiant heated floors and low voltage tile warming systems.
Measure and pre-cut membrane to four (4) to six (6) inchdes longer than required size. Re-roll membrane to half the room’s depth. Apply Interior or Exterior Primer as required:
Shake, mix, or stir primer thoroughly. Prime only an area that will be covered by a membrane within four (4) hours. Apply a thin film of uniform thickness to the substrate in single strokes. Do not re-roll primer. Air pockets may form if the membrane is installed over a wet primer. Allow the primer to dry until tacky to touch, but non-transferable to finger. This may take as little as ten (10) minutes, but usually no more than forty-five (45) minutes, depending upon temperature, humidity, internal moisture level/porosity of the substrate, and application thickness. See primer labels for additional information. Slit release paper and allow the membrane to roll out, adhesive-side down, across the primed floor. Press membrane into place with the flat side of trowel applying fifty (50) pounds of pressure per square inch or a 75100# Roller.
Butt joint thirty-six (36) inch CSM or overlap and single cut through to remove excess. For end seams, continue with next roll and butt joint ends. Membrane is non-directional. Isolation joints, such as around weight bearing columns, and expansion joints placed for vertical movement need to be carried through to tile installation. Soft joints in tile patterns are required as per the Tile Council of North America (TCNA) Handbook 2019.
APPLICATION NOTES FOR INTERIOR PRIMER
APPLICATION NOTES FOR EXTERIOR PRIMER
Do not use over copper shower pan liners. Avoid contact with aluminum, copper, copper alloys, or polystyrene foam. May damage painted surfaces, vinyl, and plastics. Before applying primer to work area, first, apply to a small test area to ensure suitability.
Not recommended for use on concrete floors with excessive moisture vapor transmission or excessive hydrostatic head pressure. Protect floors from traffic until the new floor is fully cured. Large format tile (LFT) installations may require extended cure time. Membrane and companion products must be protected from elements until the tile is installed, grouted, and cured. SGM must be contacted for special instructions prior to the application of a leveler or patching compound to the membrane. Do not use petroleum-based cleaners or sealers for tile, marble, stone, or grout. Impervious tile (less than 0.5% absorption) requires a 48-hour cure time prior to grouting. Protect floors heavy construction equipment during installation to prevent damage.
None required.
Product Information Sheet – English
CSM 90 – IIC65:
CSM 90 – STC67:
SDS: