weber.set plus is a white standard-setting cement-based polymer-modified adhesive for fixing porcelain, ceramic, quarry, terrazzo and terracotta tiles and brick slips to rigid interior and exterior floors and walls.
Not intended for areas where: - Some movement or vibration is expected - When fixing to walls above 3 m high
Gradually add approximately 3.5 parts of powder to 1 part of clean water (measured by volume), and mix to a smooth, workable stiff paste. Normal usage requires 4 litres of water per 20 kg adhesive. Use within 2 hours of mixing. Do not attempt to extend the pot life by adding more water to the mix.
Gradually add approximately 2 1/2 parts powder to 1 part (by volume) of clean water, and mix to a smooth, stiff, workable paste. After mixing, allow the mix to stand for 5 min. and add more powder if necessary. Do not re-wet or add too much water, as this will cause the set grout to be weak, with a tendency to crumble. It may also cause, surface discolouration and variation in colour, especially with darker colours.
Do not use at temperatures below 5°C. Apply the adhesive onto the substrate covering up to 1 m2 at a time (or no more than can be tiled within 20 minutes). Use a suitable notched trowel to achieve a bed thickness of 3 to 6 mm. Large or studded backed tiles may need to have adhesive buttered onto the tile back as well. Bed the tiles firmly into the adhesive with a slight sliding and/or twisting action, to ensure a good contact. It is good practice to lift an occasional tile after fixing, to verify that the required contact is being achieved. In wet areas, external areas and all floors, the final adhesive bed should be free from voids. Leave appropriate clearance joints for grouting and make any adjustments within 10 minutes. Carefully clean off any excess adhesive from the tiles and joints with a damp cloth or sponge, before it sets. Leave for at least 24 hours before grouting. Longer is required at lower temperatures or when tiling onto impervious or sealed surfaces. For swimming pools, leave at least 3 days before grouting, and then leave for a further 3 weeks before filling. Brick and blockwork Allow at least 6 weeks before tiling. Lightweight blocks need priming with weber AD250. Ensure that the wall face is sufficiently flat. Cement/sand render or screed Allow at least 3 weeks for screed and 2 weeks for render before tiling. Priming, with weber PR370 or weber AD250, may be required if the surface is very dusty or porous. Concrete Allow at least 7 weeks before tiling onto new concrete. Surface should be clean and free from laitance. Surface scabbling is recommended. Set times will be extended on dense or pre-floated screeds. Existing ceramics/vinyl tiles Ensure that the substrate is rigid and strong enough to take the weight of extra tiling, that the existing tiles are firmly adhered and that the surface is free from any wax, polish or detergent. Set time will be slightly extended. Plaster walls and anhydrite screeds Leave plaster for at least 4 weeks before tiling. Ensure anhydrite screeds are fully dry (moisture content <0.5%). It is important that the surface is sealed by repeatedly coating with primer until the surface stops absorbing. For walls in dry areas use weber PR370 otherwise use weber AD250 or weber PR360. Allowance for movement Flexible joints should be incorporated to allow for slight movements due to changes in temperature, humidity etc. as indicated by BS5385: a) where the tiling meets other materials (e.g. floor perimeters) b) along all internal corners - vertically and horizontally c) over existing movement joints or changes in background material d) dividing large tiled areas into bays (every 3 - 4.5 m on walls, 8 - 10 m on floors)
Weber's Customer Services Department has a team of experienced advisors available to provide on-site advice both at the specification stage and during application. Detailed specifications can be provided for specific projects or more general works. Site visits and on-site demonstrations can be arranged on request. Technical helpline Tel: (01525) 722137 Fax: (01525) 718988 Download Spec Sheet