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CERESIT CM 42 NATURAL STONES - FLEXIBLE TRASS

  • White tile adhesive, especially for natural and artificial stone
  • Minimizes risk of efflorescence and discoloration
  • No showing-through of the bedding mortar

Features and benefits

Natural stone adhesive mortar based on white cement with Trass for wall and floor coverings, for layers up to 10 mm thickness.

Properties

Description

CERESIT® CM 42 is a white cementitious thin-bed/medium-bed adhesive mortar with trass additive, ideal for laying wall and floor coverings made of natural or artificial stone, marble and mosaic but also ceramic tiles and slabs indoors and outdoors. Flexible adhesive bed to avoid shear stress on critical substrates. Suitable for repairs before installing tiles and for levelling unevenness of up to 10 mm.Available pack size: 25kg

Documents and downloads

How to use

CERESIT Tiling CE60 LP Instructions Illustration Step 1

SUBSTRATE PREPARATION FOR APPLICATION OF CERESIT CM 42

CERESIT CM 42 adheres to all solid, load-bearing, clean and dry substrates free of substances that may impair adhesion. Coatings of insufficient loadbearing strength must be removed. For levelling and raising the level of cementitious floors we recommend using CN 39 or CN 7 Highly absorbent substrates must be primed with CT 17. When installing tiles on existing ceramic or natural stone coverings, we recommend a full-surface coat of CT 19.

CERESIT Tiling CE60 LP Instructions Illustration Step 2

MIXING OF CERESIT CM 42

Mix CERESIT CM 42 with the pre-defined amount of clean water (see Technical Data) until the mixture is smooth and free of lumps. Leave to mature for approx. 5 minutes, then give the mortar a final stir. 

CERESIT Tiling CE60 LP Instructions Illustration Step 3

APPLICATION OF CERESIT CM 42

Use a trowel with a suitable notch size. Natural/artificial stone slabs or ceramic tiles must be installed within the open time of the mortar (see Technical Data); otherwise, the required effort will be too high. For large tiles/slabs and outdoor areas we recommend using the floating-buttering method. Fresh mortar stains can be removed with water; hardened residues can only be removed mechanically. 

Related how to guides

  • Premium Tiling System
    Providing Tiling Solutions
  • Laying Large Tiles
    Laying Large Tiles
  •  Preparation – testing the substrate
    Preparation – Testing The Substrate
  • Terraces, balconies and patios
    Terraces, Balconies And Patios
  • Bathrooms & Kitchens
    Bathrooms & Kitchens
  • Swimming & Wellness
    Swimming & Wellness
  • Tiling In Industrial Buildings
    Tiling In Industrial Buildings
  • Solutions For Special Formats & Substrates
    Solutions For Special Formats & Substrates
  • Heated floor systems
    Heated Floor Systems
  • Sound-reduction / Decoupling System
    Sound-reduction / Decoupling System

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Frequently asked questions