Mastik Tile Adhesive

RLA Mastik is an economical, flexible polymer modified adhesive with great mastic properties for bonding most types of ceramic and porcelain tiles (with the exception of moisture sensitive stone and marbles) over concrete, cement render, rendered brickwork, blockwork, gyprock, plasterboard, fibre cement sheeting & RLA approved waterproofing membranes.

Mastik is classified as a C2S1ET adhesive.

Characteristics

• RLA MASTIK is a premium grade, smooth, polymer modified, flexible white cement based tile adhesive.
• RLA MASTIK is non-slump and is ideal for large format tiles.
• It is designed for bonding all types of ceramic, stone and mosaic tiles and ideal for large format tiles, onto a variety of substrates
• like concrete, render, rendered brickwork, block work, gyprock, and fibre cement surfaces.
• It can be used Internally or externally on wall and floor surfaces.
• RLA MASTIK can be used for fixing low porosity tiles.
• RLA MASTIK can be used for fixing tiles over most waterproofing membranes. However it is advisable to contact the manufacturer prior to commencing.
• RLA MASTIK can be used in and around concrete swimming pools as long as it is mixed with Uniflex Additive.
• Not suitable for some moisture sensitive stone like green marble or some limestones.

Application

• All preparation and tiling should be carried out in accordance with AS3958.1 :2007 – Guide to the Installation of Tiles.
• Once the surface has been appropriately prepared In accordance with RLA-s Instructions then apply the adhesive onto the substrate using an appropriate notched trowel.
• For wall tiling use 6mm x 6mm square notched trowel for tiles up to 150mm x 150mm. For tiles larger than 150mm x 150mm use a 10mm x 10mm square notched trowel.
• RLA MASTIK should be applied onto the substrate at a rate of 1 m2 a time. Application rates greater than this can result in the adhesive skinning before the tiles are laid into it.
• Once the adhesive is applied onto the substrate ensure that it does not skin prior to bedding the tiles into it. Once the adhesive skins do not lay tiles into it, but remove it and apply fresh adhesive.
• When placing the tiles into the adhesive press them in by using a sliding action. Ensure no voids occur and full coverage of adhesive is under the tiles.
• For tiles with lugs, grooves or uneven backing it may be required to butter the back of the tile with adhesive in addition to trowelling the adhesive onto the substrate.
• The final bed thickness of the adhesive should be at least 2mm for wall tiling and 3mm for floor tiling.
• Once the tiling is completed do not disturb the tiled surface for at least 24 hours at 20ºC.

Cleanup:

• Excess adhesive from the face of the tiles can be cleaned up with damp cloth while the adhesive is still wet.
• Adhesive that has oozed out into the grout joint must be raked out with a knife / spatula etc.
• Tools and other equipment can be cleaned up using water while the adhesive is still wet.
• Protect tiling from rain and inclement weather until 24 hours after grouting is complete.

Coverage:

A 20kg of RLA MASTIK will cover approximately 7m2 using a 10mm notched trowel.