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CEMIX ROOF & GUTTER WATERPROOFER is a grey, flexible rubber, UV resistant, waterproofing membrane, designed for use on a variety of surfaces in positive pressure applications.


CEMIX ROOF & GUTTER WATERPROOFER can be used as an exterior waterproofer on roofs and gutters, as well as cementitious, metal and timber surfaces. It can be used as a decorative, grey finish. Alternatively, it can be painted over.


• Highly flexible

• UV stable

• Can withstand extreme weather conditions


Varies according to the substrate condition. Approximately 2m2 per liter of product at a bed thickness of 1.5mm. A minimum of two coats is recommended to achieve this bed thickness.


The substrate should be free of dust, grease, wax, oil, dirt, loose plaster, laitance, curing compounds, paint and all other friable materials and contaminants likely to prevent bonding. New concrete should be left with a wood float finish and sufficiently aged as per manufacturer recommendations. All substrates should be structurally sound, securely fastened and properly supported to eliminate any movement that may cause cracking. The substrate should be dry.


1. Stir before use.

2. Apply to the surface generously and evenly, using a medium brush.

3. After a minimum of 4 hours, apply a second coat at right angles to the first coat.

Ensure a bed thickness of 1.5mm is acheived for two coats.

Supplier Item#

2L - 20955, 4L - 20956, 10L - 20957

Download the Data Sheet for full information:

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