PS37—Economy ANSI A118.11 Multi-Purpose Thinset- Polymer Modified Mortars

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PROFLEX® PRO-STICK 37 is an economical thin set mortar that has good performance and workability characteristics along with an extended open time. When mixed, it produces a creamy, easy to spread mortar specially developed for the professional tile setter. For commercial and residential use.


  • ANSI A118.4, ANSI A118.11 compliant
  • Extended open and working time
  • High strength for a variety of applications


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 4 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 Tile 100-150 225-250
Mosaic Tile 200-225 250-275
Glazed Wall Tile  150-200 300-350

Compressive Strength 

1500-2000 3500-4000
Adjustability  20 minutes
Open Time 50-70 minutes
Final Set 6-8 hours
Recommended Trowel Sizes

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)


50 lb. bag; 56 bags per pallet