Bostik Dampfix Gold

Class 3, polyurethane waterproofing membrane for internal and external wet areas


Coverage: 2 litres/m2 (2 coats)

Bostik Dampfix Gold is a one part, highly elastic, Class 3, water-based polyurethane waterproofing membrane system that meets the requirements of AS 3740 by complying with AS/NZ 4858. Bostik Dampfix Gold waterproofing membrane system is specifically formulated for application on graded substrates that provide positive falls to drainage outlets. Overlaying tiling systems must comply with Guide to the Installation of Ceramic Tiles - AS3958.1. This is a 2-coat system applied over primed porous & non-porous substrates.
  • Overview


  • Description


    • As a waterproofing membrane to internal wet area shower, bathroom, kitchen, laundry & toilet areas to AS/NZ 3740
    • As a waterproofing membrane to external balconies, rooftops & podium levels to AS/NZ 4654.2
    • All applications to be covered by tile or other surface wearing and protective systems by following trades
    • Suitable for concrete; cement rendered masonry; FC sheeting; water resistant plasterboard; and structural plywood (Type A Stamped “PAA JAS-ANZ” to AS/NZS2269- 2004) substrates


    • Class 3, high elasticity
    • Fast drying (Recoat in 2 hours @ 20 degrees C & 50% RH, Flood Test in 72 hours)
    • Early access for following trades
    • Tile next day in most conditions
    • May be tiled directly using approved Bostik tile adhesives
    • Reinforced with clump free fibers
    • No mixing required
    • High resistance to detergents & bleach
    • Will not re-emulsify after curing
    • Does not embrittle with age
    • Excellent adhesion to concrete; rendered masonry; wet area plasterboard; FC sheet & plywood
    • Can be applied to damp substrates, i.e. no free water
    • Brush, roller or trowel applied


    • Not recommended as a membrane system in immersed applications (such as pools or spas).
    • Must not be installed directly on wet, contaminated, or friable substrates • Regular checks with a wet film gauge during the application of each coat are advised
    • Do not apply any component of the system when air or substrate temperatures are below 5ο degrees C
    • Cold damp conditions will adversely affect application properties and slow rate of curing
    • Do not apply Bostik Dampfix Gold when air and substrate temperature is greater than 35°C or below 5°C
    • Membrane should not be used as an exposed finish or as top coating exterior membrane
    • When used in areas subject to ambient conditions below freezing special installation precautions must be taken. Contact Bostik for advice before commencing work
    • All 4654.1 external membrane applications covered with a reinforced tile bed or screed must be separated from the membrane by a minimum one layer of 200um plastic sheet as a separation layer in accordance with AS3958.1 -
    • The installation of protection board and ballast, such as river pebbles or similar loose laid unbound coverings, must be isolated from the membrane by a compatible drainage cell and filter fabric system
    • Must not be applied directly over lightweight concrete
    • Hobs constructed of autoclaved aerated blocks, e.g. Hebel, must be saturated with 2 coats of Multiprime to consolidate and seal the substrate. This is to prevent pin holing of the membrane and provide enough strength to support tiling of the hob
    • Autoclaved aerated block walls must be rendered prior to the application of the waterproofing system
    • Should not be used in constantly submerged applications such as swimming pools, ponds & spas
    • Not designed to withstand negative side substrate head of pressure
    • Use only Bostik’s recommended sealants. Use of other sealants will significantly increase the risk of failure
    • Any intended application of membrane outside of recommended installation should be referred to Bostik Technical Services
    • Protect contents of pail from excessive heat, and freeze/thaw prior to use
    • Contact Bostik prior to work commencing if there is any uncertainty regarding suitability, installation or any other matters related to the system (including bond breakers)
  • Performance


  • Compliances and Accreditations

  • Systems & Installation


    Suitable sealants for use as bond breakers (in order of preference and performance) include:

    • V4 Titanium
    • V70
    • Bostik 6S
    • Bostik 616

    Primer (porous substrates/damp substrates): Bostik Multiprime
    Primer (non-porous substrates): Bostik N40 Primer
    Primer (rising damp/negative pressure):
    Bostik Moisture Seal
    Apply in two coats, each 1000 microns thick (wet film). A 15L pail will cover approximately 7.5 m2 in two coats (2000 microns total wet film thickness).
    Tile Adhesive: See Compatible Products section.


  • Compatible Products

  • Spec Clause

  • Projects & Installers

    No example projects listed

  • Downloads

    Bostik Dampfix Gold

    Glazing Construction Silicone Sealant

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