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Water Based Acrylic Liquid Membrane Dampfix 2:  

 

Dampfix 2

 

A 1-Part, Water-based Acrylic, Class 2 waterproofing membrane system that meets the requirements of AS3740 by complying with AS/NZ 4858.

 

The Dampfix 2 waterproofing membrane system is specifically formulated for application on internal wet area applications 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 & nonporous internal wet area substrates. It is not recommended as a membrane system in external or immersed applications.

 

FEATURES

 

 Class 2, medium elasticity.

    Recoat in 2 hours @ 20 C & 50% RH

    Tile after 72 hours in most conditions.

    May be tiled directly onto with approved ASA adhesives

    Reinforced with clump free fibres.

    One part ready to use.

    No mixing.

    High resistance to detergents & bleach.

    Will not re-emulsify after curing.

    Does not embitter with age.

    Excellent adhesion to concrete; rendered masonry; wet area plasterboard; FC  sheet & plywood.

    Can be applied to damp substrates, i.e. not wet or saturated with free water on the surface.

    Brush, roller or trowel applied.

    Flood Test in 72 hours.

 

RECOMMENDED USES

 

As a waterproofing membrane to internal wet area shower, bathroom, kitchen, laundry & toilet areas when installed to AS/NZ 3740.   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.

 

APPLICATION INSTRUCTIONS

IMPORTANT NOTES

 

The following instruction steps as detailed in this Technical Data Sheet may not be applicable in every application. They are provided as a guide to meet the installation requirements of AS/NZ3740.

It is recommended that the installation be carried out by professional, licensed applicators holding a current Certificate 3 in Waterproofing.

wherever appropriate, the application must comply with AS/NZ 3740 Waterproofing of Internal Wet Areas in residential buildings.

Dampfix 2 is specially formulated for brush, roller or trowel application.

A wet film gauge must be used regularly to ensure that minimum wet film builds are achieved for each coat.

All vertical terminations, including perimeter walls, hobs and penetrations etc must be of adequate height to satisfy AS/NZ 3740 for internal applications.

The minimum film build requirements are identical for horizontal applications and must be applied without slump or deformation when cured.

Apply V70 Silicone as a bond breaker joint to all horizontal/vertical junctions, e.g. wall/floor, wall/wall, hob/ floor, hob/wall & shower set downs etc, prior to all membrane applications.

Allow a minimum 72 hours before flood testing the installed system.

 

SUBSTRATE PREPARATION

 

Read precautions prior to applying any component of the membrane system.

Commencement of membrane system installation shall be taken as acceptance of the substrate suitability and preparation by the applicator.

Check that the surface of all substrates to be membraned are: structurally sound; clean; dry; or damp with no free surface water; smooth and free of voids & protrusions; oils, grease, curing compounds; coatings; adhesive residues and are uncontaminated by preceding trade activities.

Check that all composite substrates, such as wall & floor sheets are fully supported and installed to the manufacturer's instructions.

Where platform floor sheeting, in particular particleboard, is installed check manufacturer’s specification for suitability in wet area applications and ensure that protective coatings do not impair membrane adhesion.

New concrete and render must have cured for a minimum 28 days.

Sand & cement screeds and polymer modified renders must have cured for a minimum 7 days.

Substrates that are not smooth or free of voids and protrusions must be ground and vacuumed clean. All remaining voids must be repaired using, Ultrafine Finish, making sure to follow instructions for preparation, application and curing time. Refer to Ultrafine Finish Technical Data Sheet

Multiprime must be applied as a primer coat on all applications to porous substrates, e.g. concrete, screeds, renders. Refer Multiprime Technical Data Sheet.

N40 primer must be applied using 2 cloth method on all applications to dry rigid plastic & metallic nonporous substrates, e.g., UPVC drainage outlets and penetrations; aluminium angle water stops, brass, copper and galvanised penetrations, stainless steel drains & gutters etc. Refer N40 Technical Data

Sheet.

2 coats of Moisture Seal must be used to seal concrete slabs subject to a hydrostatic head of pressure from the negative side. Moisture Seal must be clean, dry and smooth immediately prior to the application of the Dampfix 2 system. Refer Moisture Seal Technical Data Sheet.

Membranes should not be applied until all preparation steps have been completed.

This product is not suitable for use in immersed applications such as swimming pools, ponds or spas.

 

CRACKS & JOINT SEALING

CONCRETE & MASONRY SUBSTRATES

Static cracks up to 2mm in width, i.e. cracks that do not move or continue to propagate, must be filled with Dampfix 2 or Ultrafine Finish after substrate priming and prior to the first full coat of membrane.

Static cracks greater than 2mm and less than 4 mm in width, i.e., cracks that do not move or continue to propagate, must be filled with Ultrafine Finish after substrate priming and prior to the first full coat of membrane.

Cracks greater than 2mm that are subject to movement or propagation must be referred to the builder or engineer for structural assessment and method of rectification to perform as an expansion joint.

Expansion joints must be a minimum 6mm in width and require a backer rod installed prior to the installation of V70 Silicone at a width: depth ratio of 2:1. See Expansion Joints below.

 

FLOOR & WALL SHEET JOINS

 

All floor and wall sheets must be installed to sheet manufacturer's specification and primed with Multiprime.

Internal or external sheet floor systems, suitable for wet area applications, require sealant application to seal sheet joins at the time of installation to comply with manufacturer's instructions. The Water proofer must confirm that the sealant used is compatible with all membrane system components.

Floor sheet joins that use Polyurethane sealants at installation must have cured for a minimum 7 days prior to the application of the 2 membrane.

All sheet joins must be isolated from the membrane by a min 25mm wide bond breaker tape that covers the entire width & length of the sheet join.

As floor sheet joins are more prone to movement over joist supports, apply an extra 1000-micron (1.0 mm) wet coat extending a minimum 35mm either side of the bond breaker tape. A further 2 full coats, at 1000 microns each, must be applied to the remaining area to be waterproofed.

 

EXPANSION JOINTS

 

All expansion joints must be isolated from the 2 membrane by a minimum 25mm wide bond breaker tape that covers the entire width & length of the joint.

An extra 1000-micron (1.0 mm) wet coat extending a minimum 35mm either side of the bond breaker tape must be applied as an extra coat. A further 2 full coats, at 1000 microns wet coat each, is required to the remaining area to be waterproofed.

 

PRIMING

POROUS SUBSTRATE

 

A porous or absorbent substrate will allow a bead of water to easily soak into, and wet out, the surface of the substrate.

To avoid pin holing Multiprime must be stirred and not shaken if colour separation is evident. Colour separation will not affect the performance of Multiprime.

Multiprime must be applied as a primer coat on all porous substrates.

Multiprime must be used as a primer coat on all Moisture Seal substrates, e.g. concrete, screeds &

renders subject to a hydrostatic head of pressure on the negative side. As soon as the final coat of Moisture Seal can accept foot traffic apply Multiprime.

 

NON-POROUS SUBSTRATE

 

A non-porous or impervious substrate will cause a bead of water to be retained on the surface of the substrate as a raised droplet. The droplet does not easily soak into the surface of the substrate.

Concrete that is overworked or burnished at the time of placement can present, when cured, as a non-porous substrate that will not easily absorb a bead of water. Mechanical abrasion, such as captive shot blasting or vacuumed grinding is required to open substrate pores prior to the application of Multiprime.

Rigid plastic and metallic substrates require N40 primer applied using the 2 cloth method e.g., uPVC drainage outlets & penetrations, aluminium angle water stops, brass, copper or galvanised penetrations, stainless steel drains & gutters etc. Refer N40 Technical Data Sheet.

 

 

Two Cloth Method

Dampen a clean & dry cloth with N40 primer and spread evenly over the non-porous substrate using a cleaning/rubbing action. With a second clean & dry cloth, immediately wipe all primer residues off with a buffing action. Allow the substrate to dry for a minimum of 5 minutes before installing V70 Silicone sealant and/or membrane. Do not leave the primer longer than 4 hours before applying sealant/membrane. Re-prime if 4 hours has elapsed without applying sealant/membrane. Clean & Re-prime if the primed surface is contaminated with excavation spoil, water, condensation, dust or other contaminates before sealant or membrane can be applied. NB: For pre-treated surfaces, contact Bostik Technical Division for P.A.T.S. Service.

 

APPLICATION

 

MOIST OR DAMP SURFACES

Must be applied to a primed substrate.

Multiprime must be used as a primer coat to porous substrates, e.g., concrete, renders, FC sheet,water resistant plasterboard & external grade plywood.

Multiprime can be applied to damp porous substrates, i.e. with no free water on the surface.

Dampfix 2 is not a vapour barrier and is not designed to stop a negative hydrostatic head of pressure. Where a substrate is subject to a hydrostatic head of pressure from the negative side Moisture Seal must be applied and allowed to fully cure before the application of the Dampfix 2 system. Refer

 

BOND BREAKER & MEMBRANE INSTALLATION

 

Internal wet area installation must comply with the minimum requirements of AS/NZ3740 Section 3, Installation. As a guide, refer pages 12 to 33.

V70 Silicone is to be installed over the dry primer coat where a bond breaker joint is required, e.g. to internal corners and changes in direction of substrate plane, such as wall/floor; wall/wall; hob/wall junctions, pipe penetrations, tap bodies, water stops, drainage outlets and the like.

Bond breaker joints must be a minimum 12mm x 12mm coved bead of sealant applied by caulking gun continuously into all changes of substrate plane, such as, wall/floor, hob/floor, hob/wall and wall/wall corners to the minimum termination height required by AS/NZ3740.

The sealant must bridge all gaps and holes with a minimum 6mm contact onto the adjacent substrates.

All bond breaker joint sealant profiles must be a minimum 6mm in depth at the mid point of the joint.

Substrate gaps at drainage outlets, flashings, and water stops, nail/screw holes etc must also be sealed using V70 Silicone sealant prior to Dampfix 2 membrane application.

Where applied, V70 Silicone must be spatula tooled smooth around fittings and at all changes of substrate plane to a minimum 12mm x 12mm coved joint. The sealant must be a minimum 6mm in depth at the mid point of the bond breaker joint and extend a minimum 6mm on either side of the joint or gap.

Apply Dampfix 2 as soon as the bond breaker joint can be over coated without deformation of the coved sealant profile.

 

 

APPLICATION OF THE MEMBRANE

 

Can be applied using a brush, roller or trowel.

Should not be applied in excess of 2mm thick per coat.

This is a 2-coat system.

Each coat must be applied at a uniform minimum 1000 microns in thickness to achieve a total wet film thickness of 2.0mm.

A wet film gauge should be used to regulate adequate membrane coverage during application of each coat.  As a further guide a 20Lt pail, applied at 1.0 litre/m2 (1000 microns) will cover approx. 20 sqm per coat.

A 20Lt pail will cover approx.10m2 in 2 coats.

 

MEMBRANE PROTECTION

 

Membrane should be protected throughout the application process and during the initial 24-hour cure period by the placement of signs and barriers to deny access by following trades.

Further temporary protection sheets must be installed securely, to protect the cured dry film from damage by following trades, until a protective screed or finished floor system is installed.

 

MEMBRANE RECOATING AND/OR REPAIR

RECOATING

The surface must be cleaned free of all tile adhesive residue, surface dust and any form of contamination or substrate irregularity.

The surface of the membrane must be washed down with diluted Bostik Sugar Soap, thoroughly rinsed and allowed to dry.

 

REPAIRING

The adjacent Dampfix 2 membrane must be sound with minimum dry film thickness of 1.2mm that is fully adhered to the substrate.

Membrane must be thoroughly cleaned of all foreign material and left free of all cleaning agent residue, dust or contamination.

Ensure that any exposed porous and non-porous substrates are correctly prepared, primed and sealed.

Apply 2 coats of membrane as per Coverage instructions.

Ensure that the membrane repair overlaps the existing membrane by a minimum 100mm.

A consistent minimum 1.2mm dry film thickness is required over both previously coated and uncoated repair areas.
 
COVERAGE
 

This is a minimum 2-coat system

Each coat must be applied at 1.0 litre / m2 or1000-microns (1.0mm) thick resulting in a total wet film thickness of 2.0mm after 2 coats.

A minimum of 2 hours should be allowed between coats.

The 2nd coat should be applied perpendicular to the 1st coat.

Extra coats may be applied if required at the same rate of 1000 microns (1mm thick) per coat.

Do not thin with water or add

The regular use of a wet film gauge during application is recommended to ensure correct wet film build per coat.

The dry film thickness, after 2 coats should be a minimum of 1200-microns (1.2mm thick).

Each 20Lt pail will cover depending on substrate conditions:

20m2 / coat.

10 m2 / 2 coats.

 

PRECAUTIONS
 

 Must not be installed directly on wet, contaminated, or friable substrates.

 Minimum dry film thickness after 2 coats is 1.2mm

 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 5 C.

 Cold damp conditions will adversely affect application properties and slow rate of curing.

 Do not apply when air and substrate temperature is greater than 35 C or below 5 C.

 

When used in areas subject to ambient conditions below freezing special installation precautions must be taken. Contact Bostik for advice before commencing work.

Membrane must not be used as an internal exposed finish or as an exterior membrane.

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 system.

Must not be used in constantly submerged applications such as swimming pools, ponds & spas.

This product is not designed to withstand negative side substrate head of pressure.

Any intended application of membrane outside of recommended installation should be referred to Bostik

 

Technical Services for approval.

Protect contents of pail from excessive heat, and freeze/thaw prior to use.

 

Bostik offers a service in which a programme has been established to eliminate potential field problems by pretesting Bostik membranes with samples of the building materials to which the membrane will be applied. This service is available on large projects where pre-application testing will aid in determining the proper method to achieve optimum adhesion. Consult a Bostik representative for further information

 

PAINTABILITY

Bostik Dampfix 2 is paintable. Refer paint supplier recommendations.

 

STORAGE & SHELF LIFE

12 Month shelf life when stored unopened between 5 C and 30 C. Protect from excessive heat, direct sunlight, moisture and freeze/thaw.

 

HEALTH & SAFETY

SEE THE MATERIAL SAFETY DATA SHEET FOR ADDITIONAL INFORMATION.

EMERGENCY INFORMATION: 1800 033 111 (ALL HOURS)

 

Clean-Up

Warm soapy water will remove product from tools & equipment prior to full cure.
 
This Technical Data Sheet may be revised, as appropriate, to comply with changes to relevant Australian Standards, reflect changes in Industry best practice in waterproofing procedures or include improvements to current technologies. The Applicator is advised to reference the latest Technical Data Sheet issue, before commencing application.

 

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