Python DS Semi-Rapid Tile Adhesive C2TE S1 20kg GREY / WHITE – Pallet Deals and Bulk Buy

Python DS extended information

Coverage: 4.5kg / m² at 3mm Bed Thickness

Technical Summary of Python DS

Unit Size	20kg Bags
Colours	White & Grey
Classification	EN12004 Class C2 TE S1
Bed Thickness	3 – 20mm
Grout After	6 hours
Coverage	4.5kg / m² at 3mm Bed Thickness
Pot Life	2.5 Hours at 20°C
Set Time	4 – 6 Hours at 20°C
Application Temperatures	5°C to 25°C
*Depending on temperatures, substrate & site conditions

Python DS Surface Preparation

All subfloors should be protected from moisture from the subground by use of a base damp proof membrane (DPM) (please check older properties, which may not have a base DPM and consult Python Adhesives for advice). Assess moisture levels in accordance with BS 8203, to achieve a hygrometer reading of 75%RH or less. Where this is not attained a surface DPM should be used – the selection of which will be subject to the subfloor (please seek advice from Python Adhesives).

Any surface laitance, adhesive residue, paints, weak smoothing underlayments and any other materials which will hinder Python DS’s bond with the subfloor should be mechanically removed.

The subfloor should be clean, dry and sound. The area should also be dust free prior to any primer application.

Priming

All ratios are water:primer.

Subfloors should always be primed. Python PR has been specifically developed to be used as a primer for use with cementitious tile adhesives to provide improved sealing and bonding properties for a variety of substrates.

Porous Substrates: (Includes: plaster, skimmed plasterboard, plasterboard, sand/cement, calcium sulphate screeds, cement backer boards, render and other open textured substrates):

Prime with 2 coats of Python PR. The first coat should be diluted 1 part primer to 3 parts clean water (by volume) and allowed to dry for a minimum period of 1 hour.
When dry, apply a second coat diluted 1:1 (by volume) and leave for 1 hour to dry before continuing the tiling process.

Non-porous Substrates: (Includes: cured epoxy DPMs, tile on tile applications, foil faced insulation boards, plywood floor overboarding): We recommend Python PR in a single, neat application.

NB: Please see technical datasheet for Python PR for coverage rate details. If in doubt as to the need for priming please consult Python Technical Department.

Subfloor Preparation

All wall and floor substrates must be clean, dry, firm and stable, free of dust, dirt, oil and grease. Substrates should be strong enough to support the weight of the adhesive and tiles being fixed (see datasheet for loadings).

For plasterboard and plaster finishes that have been painted and are showing a weak or flaky surface finish then mechanical sanders or hand sanding blocks are generally used to remove the film. However, for the likes of floor screed surface contamination, adhesive residues and weak surface laitance or even smooth dense floors such as power floated concrete, these will require a more heavy duty scarifying using specialist flooring equipment to remove the surface of the substrate to ensure the substrate is sound, stable and has a rough open texture.

To encourage best adhesion to the substrate it is advisable that prior to applying adhesive that substrates are primed (please see priming section below).

Remember – sanding or mechanical abrasion of any surface will leave powder deposits which require thorough removal by suitable vacuum equipment to provide a clean dust free surface. Failing to remove fine powder deposits and weak surfaces is a common reason for de-bonding of tile adhesive and primer from the substrate.

Using a wet sponge to clean down a wall or floor of dust deposits only serves to spread it around, it is therefore advisable to vacuum thoroughly prior to use of wet sponge.

Tile on Tile: It is always preferable to remove existing tiles however fixing new to old is an accepted method as long as the existing tiles are sound, stable, dry, securely bonded and fixed to a background that is capable of taking the additional weight. Ceramic, porcelain and quarry tiles should be lightly abraded to form a mechanical key degreased and ensured thoroughly clean. For existing vinyl floor tiles only hard and “crunchy” vinyl tiles should be considered to be over-tiled. Be aware that some old tiles of this type contained asbestos so should not be abraded. Do not over-tile onto softer vinyl, quartz or composite tiles.

Calcium Sulphate Floor Screeds: It is essential that the floor is fully dry, if in doubt always check the moisture level of the floor is below 75%RH using a hair hygrometer before continuing. This type of floor can also suffer from surface laitance issues creating a weak surface layer and therefore they are highly likely to require specialist mechanical abrasion as indicated above.

Python DS Loadings

Wall types vary considerably but all have the same basic need to be structurally sound, strong, smooth and level. It is essential that the wall to be tiled has sufficient inherent strength to hold the proposed tile and the adhesive being used.

The following chart lists maximum national standard loadings for a variety of wall substrates:

Gypsum Plaster	20kg/m2
Skimmed Plasterboard (Gypsum)	32kg/m2
Gypsum Fibre Boards	40kg/m2
Cement Tile Backer Boards	40kg/m2
Glass Reinforced Cement Sheets	50kg/m2

Selection Guide

Key areas of use:	Suitable tiles:	Suitable surfaces & substrates:
General wall installations	Ceramic	Concrete
General floor installations	Porcelain	Sand/cement screed
Interior installations	Glass	Plywood overlay (15mm min)
Exterior installations	Mosaics	Tile backer boards
Wet rooms	Marble	Cement faced fibre boards
Domestic showers with tray	Travertine	Anhydrite/calcium sulphate/gypsum based screeds
Communal showers	Granite	Tile on Tile*
Swimming pools	Limestone	Firm and stable plaster
Electric matting underfloor heating	Terracotta	Plasterboard
Piped water underfloor heating	Quarry	Sand/cement render
Conservatories	Slate	Concrete brick/block
	Quartz	Hard vinyl tiles
	Brick Slips	Flooring grade asphalt

Mixing

Once the substrate has been prepared, continue with the tiling installation.

Python DS should be added slowly to clean water in a suitable clean mixing tub and mixed thoroughly using a drill/mixer and paddle to give a slump free, easily worked mortar consistency.

Once mixed the mortar is immediately ready for use and has a pot life of approximately 2.5 hours at 20˚C. Mix only sufficient material to be used within the pot life of the product.

Do not remix or rewet/dilute product which has aged and is starting to thicken or set.

Mixing Ratio: 20kg unit requires 4.2L – 4.5L of water.

Python DS Application

Apply the adhesive to the required thickness (limits 3mm – 20mm) in areas up to 1m² at a time.

For internal walls use a notched trowel to the following notch dimensions to provide solid rib lines:

Mosaic tiles: 3mm x 3mm at 6mm centres
General wall tiles: 5mm x 5mm at 10mm centres
General floor tiles: 8mm x 8mm at 16mm centres

For floors and external applications we advise to use the solid bed method. This involves applying a uniform bed of adhesive to the floor and “buttering” the back of the tile with the same adhesive. When the tiles are bedded with a twisting action, pressing firmly down it ensures 100% contact is made with both the floor and the tile. When fitting tiles leave spaces between each of the tiles to allow for grouting (approx: walls 1mm – 3mm and floors 2mm – 12mm).

Before the tile adhesive sets clean off the excess adhesive from the face of the tile and grout joints with a clean damp cloth or sponge.

Tools Cleaning

Tools should be thoroughly cleaned with water to remove excess material immediately after use and before adhesive sets.

Grouting

Leave the installed tiles for a minimum period for at least 6 hours to set hard before grouting and/or walking on the tile.

This time may be extended on impervious/non-porous substrates. It is also dependent on temperatures and conditions.

Always check and ensure that adhesive has set hard before grouting.

Python DS Storage

This product must be stored in unopened bags, clear of the ground in dry conditions. Avoid frost.

Ideal storage temperatures are between 5˚C and 25˚C. Keep free from floor traffic and other trades whilst curing.

Shelf Life

Under the above storage conditions this product has a shelf life of 12 months.

High temperatures and high humidity will lead to a reduced shelf life.

Health & Safety

Please ensure that appropriate PPE is used when preparing, mixing and applying products.

Always wash hands before consuming food and make sure that materials are kept safely out of reach of children and animals. Please dispose of packaging and waste appropriately. A full Material Safety Data Sheet relating to this product is available from pythonadhesives.co.uk

Quality Assurance

All products are manufactured in a plant whose quality management system is certified as being in conformity with BE EN ISO 9001.
Python Adhesive products are guaranteed against defective materials and manufacture and will be replaced or money refunded if the goods do not comply with our promotional literature.

We cannot however accept responsibility arising from the application or use of our products because we have no direct or continuous control over where and how our products are used.

All Python Adhesive products are sold subject to our terms and conditions of sales, copies of which may be obtained upon request.

Points of Note:

The curing period for cement based tile adhesives will be affected by extremes in temperature. High temperature site conditions will increase the speed of cure therefore reducing the pot life and set times. Low temperatures will reduce the speed of cure extending the pot life and set times. It is therefore good practice to consider site conditions and storage of materials as essential factors in planning tiling installations.

All Python adhesives are manufactured to meet the performance requirements of BS EN 12004 and the relevant classifications.

Python Adhesives would always advise that tiling installers follow the guidelines for tiling as laid down in BS EN5385. It is essential that expansion joints are built into the design of the tiling installation in order to prevent tension build up. This is a common occurrence which can result in tiles de-bonding. Please note that this product uses natural aggregates and other materials that may marginally vary in colour. This does not affect the consistency or characteristics of the product.