KGM Liquid Membrane


1. What are membrane waterproofing products?

Membranes can be in the form of a liquid, a sheet or even an admixture. Bitumen is the most well known waterproofing material applied as a sheet, liquid, hot-roll or bog. A waterproof membrane needs to be a continual seamless barrier across the area. Fortecon or builders plastic is not considered waterproof.

2. Where can membrane products be used?

Membranes are designed to waterproof bathrooms, roofing, foundations, practically anywhere in construction. The choice of membrane is crucial, choosing the wrong membrane can be detrimental to your project. For example, bitumen-based products are suitable for external areas but not for internal areas such as bathrooms. For further information and recommendations, please contact our office.

3. How do liquid membranes work?

Liquid membranes are coated over substrate surfaces and cure to form a seamless, durable, watertight finish.

4: Can I waterproof over existing bitumen membrane?

A: Yes, providing the bitumen membrane is sound. KGM500 is an epoxy primer which can be used to seal off the existing bitumen material, please contact your stockist for further details on this process.

5: Can I tile over a polyurethane membrane?

A: The safest answer would be no. It is not the best scenario to tile directly over polyurethane, as the rubbery membrane finish can reduce adhesion. In some instances, you can sand-seed the wet membrane with clean broadcast sand to produce a rough surface, but our suggestion would be to avoid using polyurethane when direct stick tiling. As an alternative, our KGM200 latex membrane is great for direct stick tiles, and is compatible with flexible powdered glues that conform with Australian Standards.

6: Can polyurethane membrane be applied as a single coat application?

A: Although polyurethane can be applied thickly, we recommend implementing minimum of two coats to ensure no areas are missed, no pinholes are formed, and thinner coats will allow the membrane to cure more evenly. Only a skilled applicator should attempt single coat applications.

7: What warranty is available on your waterproof membranes?

A: There is a standard 10 year warranty on all products, with the possibility of project specific warranties extended to 20 years. Any warranty requirement over 10 years will need to be discussed and confirmed in writing prior to the job starting.

8. Are liquid membranes environmentally friendly?

The latex and acrylic membranes are environmentally friendly, safe for contact with drinking water, non-flammable and non-hazardous.