Gripset P39 - UV Stable Waterproofing Membrane


Gripset P39 is a highly versatile membrane developed with advanced hybrid polyurethane technology, making it suitable for a wide range of under tile and exposed membrane applications. With its superior elastomeric and flexible properties, it offers excellent waterproofing capabilities and high tensile strength. P39 also exhibits low water vapour transmission, making it ideal for areas prone to moisture ingress.

Compliant with AS 4858:2004 for internal wet areas, Gripset P39 ensures outstanding bonding properties for overlaid finishes such as renders, screeds, and tile adhesives. Its excellent resistance to UV degradation and anti-fungal properties also make it suitable for exterior substrates exposed to harsh climatic conditions.

Product Characteristics:

  • Size: 15 Litre

Features & Benefits:

  • Highly flexible and elastomeric
  • Low vapour transmission properties and low water absorption
  • Excellent adhesion properties
  • Outstanding weather resistance
  • Excellent resistance to early ponding water
  • Permanently handles wet conditions without re-emulsification
  • Resistant to fungi and algae
  • Low dirt retention
  • Light foot trafficable
  • Solvent-free and non-hazardous


Gripset P39 is suitable for various applications in commercial, industrial, and residential settings. It is commonly used for:

  • Roofs as an exposed membrane finish
  • Parapets
  • External surfaces exposed to constant weather
  • Roofs to be covered with screeds and toppings
  • Internal wet areas, such as bathrooms, laundries, and tiled areas
  • Balconies, decks, podiums, and terrace floors
  • General tiled areas to prevent moisture ingress


Gripset P39 is suitable for bonding to a variety of substrates, including:

  • Concrete, render, and masonry
  • Fibre cement sheeting, plasterboard, and structural sheeting
  • Wet area timber sheeting and external grade plywood
  • Aerated concrete panels and blocks
  • For specific surface preparation and suitability, contact the technical department of Gripset Industries.


Prior to applying Gripset P39, ensure the surfaces are properly primed. The suitable primers include:

  • Xpress Primer H20 Plus - For concrete rooftop applications, green/damp concrete, screeds, and mineral surfaces containing residual moisture
  • Gripset GP primer - For general porous vertical and horizontal building surfaces
  • Gripset OP primer - For non-porous, smooth, and dense surfaces
  • Gripset 11Y slurry - For use over asphalt/bitumen surfaces and existing coatings
  • Gripset P10 or E60 primer - For concrete rooftop applications and surfaces subject to rising damp

Storage Conditions:

Store Gripset P39 at room temperature, avoiding cold freezing conditions and direct sunlight. Shelf life is 24 months in an unopened container.

Clean Up:

Clean up any wet residue with water. Once dried, Gripset P39 needs to be removed mechanically or with a suitable solvent.

Note: It is recommended to conduct pre-testing adhesion of products on a typical area of the prepared surface before starting the application. Gripset Industries offers a service for pre-testing adhesion to surfaces, especially for large commercial areas or unusual substrates.

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Gripset P39 - UV Stable Waterproofing Membrane

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