- Mosaics
- Porcelain
- Fully vitrified tiles
- Marble
- Natural stone
- Slate
- The adhesive when set is water resistant and may be used in swimming pools.
- Suitable for use with underfloor heating and timber floors.
- Coverage is 3½ kg per square metre.
- Grout after 24 hours.
- A white flexible regular setting wall and floor adhesive for fixing ceramic tiles, mosaics, quarry tiles, marble, terrazzo, porcelain and fully vitrified tiles without the need for an admixture in internal and external locations.
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- Click here for Technical Data Sheet and Preparation advice
- Click here for Safety Data Sheet
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Surface Preparation:
Ensure the substrate is clean, firm, and free of dust, dirt, oil, grease, and loose coatings. The surface must support the expected traffic load. Pro-Flex can be applied to dry or damp surfaces, but moisture-sensitive materials must remain dry. Seal worn or porous masonry with Arc Tiler’s Primer.
Pro-Flex can be applied to waterproof plywood, which must be 18mm thick, sealed on all exposed faces, primed, and fixed at 150mm centres as per BS 5385. Not suitable for tongue and groove or floating floors.
Gypsum plaster should be scored, primed with diluted Arc Tiler’s Primer, followed by a neat coat. New concrete floors should cure for 28 days. Underfloor heating should be turned off 48 hours before and 1 week after application. Ensure paint coatings are removed, and anhydrite screeds are dry with moisture content under 0.5%. Prime with 2 coats of Arc Tiler’s Primer (1st diluted, 2nd neat).
When tiling over existing tiles, ensure they are firm and clean. Apply a slurry coat of Arc Tiler’s Primer mixed with adhesive, then tile once dry.
Mix Preparation:
Do not use below 5°C. Mix Arc Pro-Flex with water (1 part water to 3 parts powder) until a soft, slump-free mortar is achieved. Do not add water to part-used adhesive. Ideal open time is 20–30 minutes, with light foot traffic after 24 hours.
Application Method:
For ceramic tiles, use a notched trowel to create a ribbed mortar bed. Apply a 3mm x 3mm notch for mosaics, a 5mm x 5mm notch for general wall tiling, and a 10mm x 10mm notch for floor tiling. Tiles can be adjusted for up to 10 minutes after fixing. Ensure full contact by twisting and sliding tiles. Back-butter large tiles or stone for maximum bonding. For rough surfaces, use Arc Floor Levelling Compound first.
Coverage:
Coverage is about 4kg per square metre for heavy-duty tiles and 3kg per square metre for wall tiles.
Grouting:
Grouting can begin when the tile bed is firm, usually around 24 hours, depending on conditions. Arc recommends specific floor and wall grouts.
Storage:
Store in original packaging for up to 12 months in dry conditions. Supplied in 20kg moisture-resistant sacks.