Python AF

Python AF is a gypsum based, polymer modified, flexible rapid setting floor and wall tile adhesive. Python AF has been specially formulated for fixing a large variety of tiles such as ceramic, porcelain and natural stone to anhydrite/calcium sulphate screeds and gypsum based substrates such as gypsum plaster and plasterboard.

Python AF is a flexible adhesive and is suitable for use over underfloor heating systems. Its rapid setting capability allows for light foot traffic and grouting after 3 hours.

Python AF can be applied to anhydrite/calcium sulphate screeds with 85% Relative Humidity (RH) or less. Unlike cement based adhesives, Python AF is 100% compatible with anhydrite/calcium sulphate screeds. Python AF is suitable for use in internal locations only where dry conditions exist.

NB: It is not suitable for use in wet areas such as showers, wet rooms and swimming pools. Python AF cannot be used on cement based substrates such as sand/cement screeds, concrete or cement coated/based tile backer boards.

NB: Python AF is suitable for use with natural stone tiles but suitability with very porous and sensitive natural stone tiles must be tested prior to use. Confirmation of suitability should be sought from the supplier of the natural stone tiles.

If you are unsure with any of our instructions please call our Technical Helpline on 020 8778 9000, we will be happy to assist.

• Ceramics
• Porcelain
• Marble
• Travertine
• Limestone
• Slate
• Granite
• Terracotta
• Mosaics
• Quarry

• Concrete
• Plywood Overlay (12mm min)
• Electric Underfloor Heating
• Water/Wet System Underfloor Heating
• Flooring Grade Asphalt & Bitumen
• Anhydrite Screeds
• Plaster
• Plasterboard
• Existing Vinyl Tiles

Before starting, all substrates must be clean, dry and strong enough to support the weight of the tiles, tile adhesive and grout. Remove all dust, dirt, oil, grease and other contaminants that may affect adhesion.

Only mix small quantities at a time until you have become accustomed to the fast setting nature of the product. Always mix powder to water and mix to a smooth and lump free consistency. As a guide for powder to water ratio, 20kg of powder requires approximately 4.8 – 5.2 litres of water. Never add water after initial mixing, as this will impair the strength of the adhesive. Product that has started to set must be discarded.

NB: When fixing large format tiles, natural stone tiles and tiles that have deep studs on the back, you must skim the back of the tile with a thin 1 – 2mm layer of adhesive, this is referred to as back buttering. This will significantly improve the bond strength.

On a flat, even substrate where dry conditions exist, apply adhesive to the substrate as a thin floated coat at a uniform thickness of 3mm – 6mm and then rib / comb out using a suitable notched trowel. Where substrate conditions do not allow thin bed fixing, Python AF can be applied to a maximum bed thickness of 12mm. Ensuring the adhesive is still moist, bed tiles into adhesive using a twisting action ensuring full coverage of adhesive between tile and substrate. Regular checks should be made to make sure that there are no voids in the adhesive bed.

Clean surplus adhesive from the tiles and joints as soon as possible as set adhesive will prove very difficult to remove later.

Clean tools after use with water.

Do not start grouting until the adhesive has set. This time can vary depending on temperature and site conditions. Impervious surfaces may extend the set time. In ideal conditions grouting can begin after 3 hours. If you are tiling an area of limited movement or underfloor heating, you must use a flexible such as Python CS.

If you are unsure with any of our instructions please call our Technical Helpline on 020 8778 9000, we will be happy to assist.