These files are provided by the manufacturer. While Building Products Index takes every care to ensure the information is correct and up to date, we cannot be held liable for any out of date or incorrect information in them. You should check with before specifying or purchasing products.

Dunlop 2 Part Rapidset Flex

Published [11/01/12]File size [40 KB]

Dunlop Anti Mould Grout with Microban

Published [11/01/12]File size [40 KB]

Dunlop Fast Set Floor Levelling Compound

Published [11/01/12]File size [44 KB]

Dunlop Fast Setting Render

Published [11/01/12]File size [42 KB]

Dunlop Flexible Additive

Published [11/01/12]File size [36 KB]

Dunlop Flexible Floor Wall Grout

Published [11/01/12]File size [38 KB]

Dunlop Large Format Natural Stone Adhesive

Published [11/01/12]File size [38 KB]

Dunlop Multi Purpose Fix n Grout

Published [11/01/12]File size [41 KB]

Dunlop Non Slip Wall Tile Adhesive

Published [11/01/12]File size [40 KB]

Dunlop Patch Repair Cement

Published [11/01/12]File size [40 KB]

Dunlop Premium Floor Leveller 2

Published [11/01/12]File size [37 KB]

Dunlop Rapidset Floor Wall Tile Adhesive

Published [11/01/12]File size [37 KB]

Dunlop Ready Mixed Grout with Microban

Published [11/01/12]File size [37 KB]

Dunlop Shower Waterproofing Kit

Published [11/01/12]File size [39 KB]

Dunlop Silicone Sealant with Microban

Published [11/01/12]File size [36 KB]

Dunlop Smoothing Levelling Compound Data Sheet

Published [11/01/12]File size [43 KB]

Dunlop Standard Set Floor Wall Tile Adhesive

Published [11/01/12]File size [39 KB]

Dunlop Standard Set Plus Floor Wall Tile Adhesive

Published [11/01/12]File size [40 KB]

Dunlop Thick Bed Floor Leveller

Published [11/01/12]File size [45 KB]

Dunlop Thick Bed Floor Leveller Data Sheet

Published [11/01/12]File size [45 KB]

Dunlop Tile on Wood

Published [11/01/12]File size [40 KB]

Dunlop Universal Bonding Agent

Published [11/01/12]File size [36 KB]

Dunlop Waterproof Wall Tile Adhesive

Published [11/01/12]File size [40 KB]

How to Tile Kitchen, Bathroom Walls

Published [04/06/09]File size [863 KB]

How to Tile Showers

Published [04/06/09]File size [830 KB]

How to Tile With Large Format & Natural Stone Tiles

Published [04/06/09]File size [904 KB]

How to Tile with Large Format Tiles onto Walls

Published [04/06/09]File size [814 KB]

New Dunlop Product Guide

Published [07/06/10]File size [848 KB]

APOLLO SCREED – WIN THE FIGHT WITH ANHYDRITE
January 2012

It’s strong, it’s temperamental and if you treat it wrong there could be consequences. Yes, this month, we’re talking about the hotheaded anhydrite screed. A product more confidently used by the professionals in the trade, however, with tradesmen having to adapt their skills more, Debi Bailey, Brand Manager of Dunlop Adhesives, casts her beady eye over the use of this tricky substrate and shares some trade secrets with merchants to encourage better practice in the building environment.


Why use anhydrite screed?
So, let’s start with the benefits. Anhydrite screed possesses properties that make it an extremely attractive option in the trade. Whereas traditional sand and cement screeds can be slow and labour intensive to install, anhydrite screed is substantially quicker and easier. In addition, it is also cheaper, self-levelling, offers minimal shrinkage and is convenient for use with underfloor
heating. It is also fast setting, and can be ready to be worked upon four or five days later.

The overall effect is that anhydrite screed, at least in the laying phase of usage, is less reliant on the quality and experience of the installer. However, when it comes to tiling on top, the expertise and knowledge of the tradesman is paramount, which is where merchants can step in and share their inside knowledge to help tradesmen avoid potential pitfalls and ensure repeat custom.

The Dangers!
The reason for this screed’s perceived ‘ill-behaviour’ is that if it is not correctly prepared, the combination of moisture and a potentially weak surface can react negatively with the tile adhesive, terminally disrupting the bonding process. As with ceramic/porcelain tiles as well as with stone, there are a number of specific effects to be wary of.

The first involves the direct application of the cement-based adhesive. The adhesive can react with the gypsum in the screed resulting in a mineral called ettringite being formed at the interface. The subsequent chemical changes are sufficient enough to cause de-bonding of the adhesive away from the screed base. Secondly, the presence of a weak layer of laitance is created, slowing the drying time and making the screed weak to tile onto. As with traditional cement; sand screeds, it is always good practice and important to mechanically abrade and remove any laitance from the surface of the screed using suitable vacuum equipment as per the screed manufacturer’s recommendations.

Finally, and an issue that applies regardless of the tiling material, is the simple fact that whilst on site it is extremely difficult to tell an anhydrite screed apart from a traditional screed.

When any of the above issues are not fully considered, the effects can be disastrous for not only the tradesmen but the homeowner as well, with tiles failing to bond or becoming detached from the floor.

Solutions
To avoid the above problems, the key is in the preparation. Once the anhydrite screed has been laid, the problematic layer of laitance should be removed approximately 4-6 days after application (although the precise time depends on the brand of screed used), which will not only help the drying out process, but will also provide a stable surface on which to tile onto. If the finished floor may be exposed to moisture, a watertight primer should be used, to seal the anhydrite before the application of a cement-based tile adhesive. However, it is also extremely important to be aware of the residual moisture content of gypsum-based screeds. For priming and direct fixing to the screed with a cement based adhesive, the moisture content must be less than 0.5% water by weight .

The use of a primer is crucial in order to help to stabilise the screed surface further and to act as barrier/sealer between the Anhydrite screeds and the adhesive.* The tiles can then be installed onto the screed using a solid 3mm bed of cement-based adhesive, however tradesmen should also take into consideration the tile type they’re working with when selecting an adhesive. When the adhesive is set, tradesmen can then safely begin grouting, ensuring that the grout completely fills the joint.

And that’s it! The characteristics of anhydrite screed have been laid bare; the secrets of the substrate have been revealed. Go forth and floor.

Patch and Repair Cement and Fast Setting Render
June 2010

Dunlop Adhesives has this month increased its range of preparation products with the launch of its ‘Patch and Repair Cement’ and ‘Fast Setting Render’. Available now, the specialist manufacturer of tile adhesives, grouts, finishing, and now ancillary products, launched its two new signings thanks to the positive feedback and popularity of its new fast-setting, thick bed and self levelling floor compounds.
The Patch and Repair Cement will repair cracks and holes in walls, floors and concrete, whilst the Fast Setting Render is a pre-mixed product for use on both external and internal walls. With each product designed to suit a variety of requirements, Dunlop Adhesives is yet again expanding its range of products to aid the success of tiling projects, no matter how large or small. As with all other products in the Dunlop range, these two new products are supported by a 10 year guarantee.

Pre mixed, single part, the Fast Setting Render:

•Is ideal for internal and external wall render
•Sets in two hours
•Up to 15mm thickness. For thicker coverage additional layers of the product can be built up
Strong and easy to use, the Patch and Repair Cement:

•Repairs cracks and holes in a variety of masonry surfaces
•Sets in 30 minutes
•Needs mixing with just water
•Is ideal for fast and easy repairs
•Can be used for small repairs up to 50mm depth•For larger repairs, bulk out by adding builders grit/sharp sand at a 1:1 ratio
The success of the floor levellers, which became available in February, has spurred Dunlop on to add further products to the range. Brand Manager for Dunlop Adhesives, Janet Till, reported:

“We have had really positive feedback since the launch of the floor leveller products. This was our first real taster of offering products outside the traditional tile adhesive, sealant and finishing product range since the re-brand and so far it has proved fruitful. We believe these further two products will provide a complete collection of preparation products and look forward to building on our range throughout the year.”