Notes for preparing cement based adhesive mortars

• Pay attention to add water into mortar gradually. Otherwise it is not homogenised and gets lumpy.
• Apply appropriate method to get the best result
• When not used for a while, please mix the mortar in the package beforehand.
• To protect the mortar against drying in the surface, please mix the mortar frequently.
• Do not use the mortar with best-before date time-out or get rid of hardened surface.

Environmental Conditions
Working conditions may vary according to seasons and geography. Too cold, too hot, windy and under direct sun can cause disorders. For instance; it is inconvenient making applications under +5 °C. For cement based mortars, appropriate temperature is the lowest temperature that the mortar grows self-heating. Making applications are also not convenient over +35 °C. Better temperature range suggested is in between +5 °C and +35 °C. Since working under sun and wind reduces the estimated process cycle time, there such conditions also decrease the performance.

Surface investigation and preparation
New surfaces: Surfaces must be toughen and must have cured for 3-4 weeks. Any contaminating materials must be cleaned off. Rough and uneven parts of surface must be levelled.

Old surfaces: To obtain health applications, old surfaces must be investigated against rigidity. Any soft parts of the surface must be scratched off until reaching rigid parts and cracks and weak surface parts must be repaired using BMD mortars. Because of the negative effect of any dust, dirt, oils, surface must be cleaned from all leftovers.

Ceramic tiled surfaces: Check the surface with a hammer. Fix not strong and weak tiles or remove them and fill the surface using BMD repair mortars.

Painted Surfaces: If the surface will be covered with ceramic, first check the surface. Areas loosen and blown must be scratched off. In order to increase the adhesive’s performance, the surface may be sandpapered or scratched firmly.

Wooden-OSB Surfaces: Loosen and weak pieces must be repaired and broken and freed parts must be replaced beforehand. Surface must be undercoated. It is suggested using a net in order to obtain longer life.

Cementing Methods
There are three international methods in use for cementing. Basic principal here is to fill the gap between the material and the surface with mortar without air gaps.

1- Combing Method
This method is the most common method to cement small and medium size materials. After spreading the plaster pressing with a trowel carefully, using a notched trowel accordingly to the tiles, the plaster is combed with 45° and 60°. Then the tiling material is cemented on the combed plaster by pressing firmly on the combed plaster. To get the plaster better spread and stick over back of the tiling material, use rubber or wooden hammer and make them levelled.

2- Oiling Method
This method is used to cement small and medium size materials. A thin layer of adhesive is spread over the back of tiling material using a trowel leaving no empty areas in corners and edges and is pressed on the surface. To get the plaster better spread and stick over back of the tiling material, use rubber or wooden hammer and make them levelled.

3-Combined
This method is the best for laying large materials. Well suit for applications such as floors under heavy pedestrian and load traffic, cold climates, outdoor applications. Using both Combing and Oiling Methods, the mortar is plastered on both of the surfaces. To get the plaster better spread and stick over back of the tiling material, use rubber or wooden hammer and make them levelled.