ANSI A118.11 Premium Medium Bed Mortar-Polymer Modified Mortars

PROFLEX® PROFLEX PRO-STICK 50 is a (ANSI 118.11) latex modified, medium bed mortar composed of sand, cement, and resins used to adhere a variety of tile surfaces, natural stone, marble, and granite, to approved substrates. Specially formulated to hold large format tiles and stone surfaces in place on vertical surfaces, and reduces unevenness caused by setting tile on horizontal surfaces. PRO-STICK 50 is applied in thickness from 3/16 to 3/4 inches to adhere marble, granite, and tile, to plaster, drywall, concrete, and masonry surfaces. Designed to set tiles vertically of up to 5 lbs. per sq. ft. (Larger sized units must be field tested to determine suitability).


  • Non Sag formula supports heavy tiles and ungauged natural stone surfaces
  • For interior and exterior applications
  • Builds up to 3/4” with minimal shrinkage
  • ANSI A118.4 and A118.11 compliant


For installation of: Ceramic tile, Pavers, Quarry tile, Porcelain tile, Clay bodied tile, High bottom lugged tile, Marble, Granite, Mosaic, large format tiles, Vertical tile installations up to 5 lbs per sq. ft

For installation over: Tile backerboard, Plumb and true masonry, Properly cured and finished concrete, Gypsum plaster, gypsum block or gypsum board (dry areas – walls only), Cured portland cement mortar, exterior grade plywood, plastic laminates, masonry surfaces.

Shear Strength 7 days (psi)28 days (psi)
Quarry Tile250-300550-600
Mosaic Tile250-300350-400
Glazed Wall Tile 400-450450-500
Compressive Strength4000-45006000-6500
Adjustability 15 minutes
Open Time60 minutes
Final Set6-8 hours

Recommended Trowel Sizes

3/4” x 9/16” x 3/8” U Notch trowel 34 – 38 sq. ft., 1/2” x 1/2” x 1/2” Square Notch trowel 40 – 50 sq. ft. , 1/4” x 3/8” x 1/4” Square Notch trowel 70 – 80 sq. ft.

Suitable Surfaces

Backer Boards, Plumb and True Masonry, Cured and Finished Concrete, Gypsum Wallboard (dry areas only), Cured Portland Cement, Exterior Grade Plywood, Plastic Laminate, Masonry Surfaces, Proflex Membranes and Underlayments (see warranties)