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DAMPFIX PU-Technical Data Sheet

By  Last updated: 4th September 2010

Dampfi x PU is a fl exible, elastic one part polyurethane membrane used for waterproofi ng
shower recesses, bathrooms, laundries, balconies, decks, roofs and planterboxes.
• Pre-mixed
• Highly fl exible
• Requires no re-inforcing
• Light grey
• Easy to apply
• Internal and external application
Surfaces must be fi rm, dry, sound and smooth. All grease, oil, wax, curing compounds, dust, plaster droppings, loose material,
paint and any other contaminants must be removed. Building boards must be fi xed in accordance with the manufacturer’s
directions. Allow concrete to cure for 28 days and cement render for 7 days prior to the application of Dampfi x PU.
Priming: Generally surfaces do not require priming. In areas where the substrate is damp or water is likely to rise up below the
membrane, then ASA Dampfi x Moisture Seal must be used prior to the application of Dampfi x PU.
ASA Dampfi x Moisture Seal is a 2 part water based epoxy which dries to form a waterproof barrier. Dampfi x Moisture Seal
prevents rising damp and continual seepage, resists grease, oil, detergent and most mild chemicals. Ideal for retaining walls,
concrete tanks, lift wells and troughs. This product should be used as a primer before the application of Dampfi x membranes.
ASA Dampfi x Moisture Seal comes in 4 litres,8 litres, 20 litres and 40 litres kits.
Crack Treatment: For static cracks greater than 1mm, clean thoroughly then fi ll with ASA Dampfi x Seal ‘n’ Fillet. Allow to
dry. Dampfi x Seal ‘n’ Fillet is a white, low modulus, polyurethane sealant which cures from moisture in the air to form a soft,
elastic and weatherproof sealant. ASA Dampfi x Seal ‘n’ Fillet comes in 600ml (720 grams) sausages
Sheet Joints: Apply a bead of ASA Dampfi x Seal ‘n’ Fillet at all wall/fl oor joints, wall/wall joints, all sheet joints and fi xings
and at any change of direction in the substrate.
The application of Dampfi x PU must comply with AS3740 2004 “Waterproofi ng of Internal Wet Areas in Residential Buildings”.
Dampfi x PU can be applied with a brush or roller. Dampfi x PU must be applied to achieve a dry fi lm thickness of 1.3mm for
optimum performance. To achieve the required dry fi lm thickness of 1.3mm, apply the Dampfi x PU at a rate of 0.75 litres/m2
per coat. Two coats are required. Allow a minimum of 24 hours between coats.
Note: Protection boards must be used to protect the membrane before back fi lling or concreting.
Clean tools and equipment with Bostik Handi-Clean Wipes while the membrane is still wet.
15 litre metal pails.
Commence tiling after membrane has fully cured. It is recommended that the membrane be tiled, or a mortar bed applied
within 72 hours of membrane application since this eliminates surface contamination. If tiling is carried out after this time,
ensure that the surface is clean and dry.
Internal Wall Applications
ASA Polyfl ex, ASA Megafi x, ASA Confl ex and ASA Asafl ex
Internal Floors and External Applications:
Option 1: ASA Polyfl ex
Option 2: The membrane must be primed with ASA Multiprime – 2 Part water based epoxy. Prime at a rate of 6 to 8m2 per
litre, ensuring the membrane is fully covered. Tiling must commence within 4 days of application of Multiprime – 2 Part using
ASA Fixall mixed with undiluted ASA Megalastic, ASA Confl ex or ASA Asafl ex. Refer to ASA Multiprime – 2 Part data
sheet for full application details.

Approximately 24 hours at 25°C.
1.5 litres will cover approximately 1m² at 1.3mm dry fi lm thickness.
During application of Dampfi x PU, avoid contact with skin and eyes. Wear eye protection and gloves. Use in a well ventilated
area. If contact with skin occurs, wash affected area well. If contact with eyes occurs, fl ush eyes with copious quantities of
clean water for at least 15 minutes and contact a physician. It is advisable to use good occupational health and safety practices
to avoid personal contact. For more detailed information refer to product MSDS.
Unopened pails can be stored for up to 12 months in a cool, dry and weatherproof environment.
• Do not use as an exposed fi nish or top coat exterior membrane
• Do not apply if temperature is below 5°C
• Do not use as a vapour barrier
• Excessive water under the membrane will create bubbling.

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