Product Data Sheet
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SikaTile®-905 Fat Mud

SikaTile®-905 Fat Mud

MORTAR SETTING BED FOR VERTICAL SURFACES 

SikaTile®-905 Fat Mud is a Portland Cement based tile mortar, pre-blended and packaged in 50 lb. bag for easier handling.

  • For use as a scratch coat and wall render, or as a concrete patch from 1/4" to 2" (6 mm to 5 cm)
  • Easy to use
Product Data Sheet
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Usage

Mortar setting bed on vertical walls over an appropriate membrane and metal lath. Available in Northern California region only.  

Advantages

  • For use as a scratch coat and wall render, or as a concrete patch from 1/4" to 2" (6 mm to 5 cm)
  • Easy to use

Packaging

  • 50 lb (22.7 kg) bag
  • Bulk/Silo - call for details

Color

Gray powder

Product Details

Sustainability / Certifications / Approvals

APPROVALS / STANDARDS

Raw materials meet or exceed the following standards:

  • Portland Cement Type II/V ASTM C 150
  • Mortar Sand ASTM C 144
  • Type S Lime ASTM C 207
Product Information

Shelf Life

12 months from date of production if stored properly in original, unopened and undamaged sealed packaging

Storage Conditions

Store dry at 40–95 °F (4–35 °C).
Protect from moisture. If damp, discard material

Application

Application Information

Mixing Ratio

1 gal. and 1 pt. (4.25 L) per bag
Consumption

Coverage

Thickness

50 lb. bag

1 ton silo

1/2" (1.27 cm)

8 ft2 (0.74 m2)

400 ft2 (37.16 m2)

(Coverage figures do not include allowance for surface profile and porosity or material waste)

 
Application steps

MIXING

Mix approximately 1 gallon and 1 pint (4.25 L) of clean potable water in the temperature range of 50 to 80 ºF per bag. Mix thoroughly until a consistent mix is obtained.

Documents

FAQ

Are surface flatness requirements uniform regardless of tile size?

No, they are not. For standard-size tile < 15”, the substrate flatness tolerance is no more than ¼” variance in 10”. For tile > 15”, the substrate flatness tolerance is no more than 1/8” variance in 10’. This applies to any substrate whether it is a wall, floor, ceiling etc.

Can I use thinset to patch a surface?

No.  Thinset is an adhesive, not a patching or leveling compound. Thinsets are
designed to be a certain thickness and when that thickness is greater than what the thinset can handle, shrinking will occur. Use a product that is designed for patching or leveling.

How do I deal with old black adhesive on the floor?

Some old “cutback” black residues may contain asbestos. If the residue has asbestos, a professional will need to remove it. If the black residue does not contain asbestos, it may be removed by mechanical means such as sand blasting or grinding. Some products can encapsulate the black residue, preventing mechanical removal. Check Technical Services to find the correct products.

Which is better: level or flat?

In most cases, flat is better than level. For example, an exterior deck needs to be flat and not level. Building codes require the deck to be pitched away from the building, which would make the deck not level. But, to install tile the deck must be flat. So, it all depends on the application.