Python GT


Badge Gt 2

A high specification, highly flexible and rapid cement based floor and wall tile adhesive developed for fixing ceramic and porcelain tiles, natural stone and mosaics to difficult substrates.

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Product Details

Suitable for fixing ceramic, porcelain and natural stone tiles

Can be used on green screeds

Can be used with underfloor heating systems

Bonds to metal substrates

Allows for light foot traffic and grouting after 3 hours

Ideal for areas subject to prolonged or permanent wet conditions such as swimming pools

Suitable for internal and external use

Unaffected by frost after setting

No additives required

3 - 12mm bed thickness

Technical Specification

Suitable Tiles
  • Ceramics
  • Porcelain
  • Marble
  • Travertine
  • Limestone
  • Slate
  • Granite
  • Terracotta
  • Mosaics
  • Quarry
  • Quartz
  • Composite
Suitable Substrates
  • Sand/Cement Screed
  • Concrete
  • Plywood Overlay (6mm min)
  • Electric Underfloor Heating
  • Water/Wet System Underfloor Heating
  • Tile Backer Boards
  • Existing Ceramic, Porcelain and Natural Stone Tiles*
  • Flooring Grade Asphalt & Bitumen*
  • Anhydrite Screeds
  • Plaster
  • Plasterboard
  • Fibre Cement Sheet
  • Cement/Sand Render
  • Concrete Brick/Block
  • Flooring Grade Asphalt & Bitumen
  • T & G Floorboards
  • Floating Floors
  • Existing Vinyl Tiles*
  • Steel/Metal Surfaces*
  • Fibreglass
  • Green Screed

*Prime with Python PR


Python GT 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 or alternatively, please contact our technical department on 020 8778 9000, we will be happy to assist.


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.

Mixing and Application

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 3.6 – 3.8 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 GT can be applied to a maximum bed thickness of 15mm. 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.

NB: When fixing tiles externally or in areas subject to prolonged or permanent wet conditions, you must ensure that you achieve 100% adhesive coverage between tile and substrate.

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 grout such as Python CS.

NB: If using Python GT onto a substrate subject to significant movement and/or vibration such as T&G Floorboards or floating floors, Python CS will require the addition of a flexible additive in order to increase the flexural properties of the grout. For more information please contact our technical department on 020 8778 9000, we will be happy to assist.

Technical Data

Standard ConformityConforms to BS EN 12004 C2 F S2
Bed Thickness3mm – 15mm
Coverage20kg will cover approximately 4 – 6m² at 3mm bed application
Open Time/Working TimeApproximately 30 minutes at 20ºC
Before GroutingApproximately 3 hours depending on temperature and substrate. The set time will be increased by lower temperatures and reduced at higher temperatures.
StorageStore unopened, clear of the ground in cool, dry conditions
Shelf lifeStored correctly this product has a shelf life of 6 months
ColoursGrey and White
Pack sizes20kg
NoteAll work must be carried out in accordance with British Standard Code of Practice for floor and wall tiling BS5385.


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