What You Need

• DUNLOP Undertile Waterproofing Membrane (4L waterproofs a standard shower)
• DUNLOP Primer & Additive
• DUNLOP Reinforcing Mat
• Neutral cure silicone
• Paint brush or roller
• Caulking gun (for sealant)

The DUNLOP Shower Waterproofing Kit includes DUNLOP Undertile Waterproofing, DUNLOP Primer & Additive, Neutral cure silicone, DUNLOP Polyester Reinforcing Mat and an instruction leaflet.

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Areas to Waterproof

Always check your local council's minimum requirements for waterproofing in wet areas prior to carrying out a waterproofing project. The general requirement is as follows:

• Full floor within shower recess
• Minimum 100mm over the hob and onto the bathroom floor
• Minimum 150mm up walls within shower recess
• The wall to wall junctions(s) within shower up to a minimum height of 1800mm or 80mm above shower rose
• The full bathroom floor if it is made from timber, plywood or particle board or if it is above ground floor or if it has a floor waste.

Surface Preparation

Ensure surfaces are sound and dry and floor sheeting materials are installed to manufacturers instructions. Remove all contaminating materials such as dirt, oil, paint and curing compounds. Prime all areas to be waterproofed with DUNLOP Primer & Additive according to instructions on packaging. AAC blocks will require 2 coats of DUNLOP Primer & Additive. Treat all cracks and floor/wall junctions with a neutral cure silicone.

Application

• Apply the first coat of DUNLOP Undertile Waterproofing membrane with a clean paint brush or roller so that all surfaces requiring waterproofing are completely covered with a generous coat.
• While the first coat is still wet, install DUNLOP reinforcing Mat in all wall/floor junctions, cracks and over the shower hob.
• Remove any wrinkles in the mat and ensure the mat is fully wetted with no dry area. Immediately apply a second coat. In areas where no mat has been used, allow 4 hours drying time before applying a second coat.
• The membrane should be 1.0mm thick after 2 coats (dry film thickness).
• Do not commence tiling until the membrane is completely dry. This can take up to 48 hours. Drying time will depend on temperature and humidity. The following Dunlop adhesives are suitable for use over Dunlop Undertile Waterproofing Membrane: Dunlop Wall and Floor Tile Adhesive Dunlop Tile-All, Dunlop Trade MPP, Dunlop Trade Super Tileset, Dunlop Trade Abaflex.

For advice on grouting, please see our How To Guide, Grouting