CM 17


Super flexible tile adhesives


High performance flexible thin bed mortar tile adhesive for installing ceramic tiles and slabs as well as natural stones


  • High bond strength
  • Super flexible – special polymers modified
  • For tile on tile application
  • Balancing substrate deformations on critical surfaces like balconies, terrace etc
  • Suitable for installation of large format tiles
  • For indoor and outdoor areas
  • Suitable for wet areas and swimming pools
  • Easy application

This TDS is applicable for the United Arab Emirates only. Please contact your local Polybit sales office for the available TDS in your region

Step by Step


CM 17 adheres to all solid, load bearing, clean, dry and moist substrates free of substances which may impair adhesion.

Indoors & Outdoors

  • Concrete (residual moisture ≤2%)
  • Cement screeds without floor heating, plasters, cement and lime plasters (residual moisture ≤1.5 %)
  • Cement screed and concrete must be of recommended age as per the design 


  • Anhydrite substrates without floor heating (residual moisture below 0.5%) and gypsum (residual moisture below 1%) substrates
  • Mechanically roughened, cleaned from dust and primed with CT 17
  • Aerated concrete (free from dust and primed with CT 17) Substrates must not be wet. Any existing dirt, loose layers and paint coating with low strength shall be mechanically removed. Absorbent substrates shall be primed with CT 17 and left to dry for at least 2 hours. Surface unevenness of up to 5 mm can be filled on the previous day using Polybit CM 17 mortar.


Pour Polybit CM 17 into the precisely measured amount of clean water (25-29% by weight, 6.25 – 7.25L for 25 kg) and mix with a drill and mixer until a homogenous mass without lumps is reached. Leave for 3 min. and then mix again. Apply the mortar with a suitable notched trowel on the substrate. Size of trowel teeth depends on tile size. For indoor use, the mortar coverage (wetting) on the tile backside must be at least 65%. The floating-buttering method shall be used for larger tiles and for outdoor applications (i.e. additionally a thin layer of the mortar should be spread on the tile’s backside, wetting equal or more than 90%). Place the tiles only during the open time of the adhesive. The width of grouts should be the same and should depend on tile size and exposure conditions. Fresh excess mortar can be removed with water; hardened material can only be mechanically removed. Grouting can be done after approx. 12 hours using Polybit grouts. Walkability is reached after 24 hours. Expansion joints, joints at the corners of walls and floor and around sanitary equipment shall be filled with silicone sealant.

CM 17 Intro

Impact Test

Polybit SWITCH

Shear Test

Flexibility Test

Water Absorbtion