Benefits and Advantages
It is a versatile membrane suitable for many demanding waterproofing
It meets the criteria of AS4858:2004 and is applied in accordance with AS3740.
Not a hazardous product and not flammable. Water based.
Contains micro fibres (internally reinforced) eliminating the need to use external reinforcing.
Permanently flexible but not as flexible as Durabit EF.
Suitable for contact with drinking water.
Formulated for wet area and under tile applications.
Does not re-emulsify after proper curing.
Tough, durable and flexible.
Compatible with most tile adhesives.
Easy to apply.
Will not stain grout or tiles.
Available in range of colours.
Precautions in Use
The product is considered safe to use if used correctly, as intended and proper industrial hygiene and practices are used. Always observe safety precautions.
Priming and Surface Preparation
Good preparation is essential. Surfaces must be sound, stable, dry, clean and free of dust, loose, flaking, friable material and substances that may diminish adhesion.
Surfaces should be suitably primed with Primeseal MC applied at no less than 1 litre per 4m2 and allowed to dry. Primeseal MC must be used for roof and exposed areas, timber and particle board surfaces, bitumen or where there is a risk of entrapped moisture in the substrate which may cause the membrane to bubble.
Priming is ad equate if the surface has a solid off-white appearance. Particle board and bitumen surfaces should primed with 2 coats of Primeseal MC.
Alternative primers such as WB Primer. may be used in non-exposed areas and where the moisture content of the surface is very low applied at no less than 1 litre per 4 m2.
Excessively porous, friable and dusty surfaces may require an additional priming coat.
Please refer to the product data sheets of the stated primers.
Prime as required.
Apply an adequate flexible polyurethane sealant, in accordance the manufacture's instruction and tool off to form a solid, coved or 45
fillet extending at least 10mm on to the adjacent surfaces. Apply the membrane directly over the sealant and on the adjacent surfaces.
For Additional waterproofing protection the following additional steps should be taken
Lay a strip of Wrimco Flashing tape (stick-stick, butyl mastic waterproofing membrane with a polyester backed reinforcing fabric) over the cured polyurethane sealant (as described above) pressing it firmly on the surface. Apply the membrane directly over the tape and on the adjacent surfaces.
Joins, Gaps and Cracks
Joins, gaps and cracks should be suitably filled and sealed with an appropriate elastomeric sealant, preferably a polyurethane sealant, and allowed to cure.
Recommendation: The movement of small cracks should not be underestimated and should be at least covered with a flexible polyurethane sealant or additional coats of membrane.
Large or Live Cracks
Large cracks should be routed out to form a 'V' and then filled and sealed with a polyurethane waterproof joint sealant as per the manufacturer's instructions. The sealant should be finished slightly proud of the surface and allowed to cure.
After priming, as required, lay a strip of Wrimco Flashing tape over the join or crack pressing it firmly on to the substrate. The membrane is then applied directly to the Leak-Seal Tape and extending at least 75mm on to the adjacent surfaces.
If the Leak-Seal is not used then a suitable bond breaker tape (such as duct tape) at least 48mm wide should be laid over the join or crack and apply 3 coats of Durabit Reo extending at least 75mm on to the adjacent surfaces.
Joins - Particularly in CFC Sheeting and Timber Sheeting
Ideally the sides of the sheets should be fully coated with a flexible polyurethane waterproof joint sealant prior to butting the sheets together.
If not, the joins should be suitably filled and sealed with an appropriate elastomeric polyurethane waterproof sealant and finished flush with or preferably slightly proud of the surface and allowed to cure.
After priming, as required, lay a strip of Leak-Seal Tape over the join, pressing it firmly on to the substrate. The membrane is then as described under 'Large or Live Cracks'.
If the Leak-Seal is not used then follow the procedure as described under 'Large or Live Cracks'.
Waste Outlets, Penetrations and Angles
Waste Outlets: Floor wastes and puddle flanges should be rebated in to the floor to allow water to readily drain. Gaps and perimeters should be sealed with a polyurethane sealant.
Plastic or metal angles: Where required by the Building Code such as internal hobs and exterior door barriers and also plastic corner angels under wall boards, they should be securely embedded in to a continuous, gap free bed of a polyurethane sealant / mastic.
Stir well. Apply by brush, roller, soft broom or spray.
Apply in a minimum of two coats. To perform correctly the dry film thickness of the membrane must be at least 1mm to 1.2 mm.
Durabit Reo is suitable for use with a reinforcing fabric or Wrimco Flashing tape.
The stated average coverage rate may vary depending upon type, condition, porosity, texture of the surface and application technique.
Unreinforced: Minimum 1.5 litres per sq.m., i.e 0.75 litres per m2. per coat. A 15 litre pail will cover 10 sq.m. for 2 coats.
Reinforced: Minimum: 2.0 litres per m2.
The dry film thickness of the membrane must be at least 1mm.
Minimum 1 litre per 4m2.
It is available in Grey & Blue. Special colours available upon request but minimum orders will apply.
Drying and Curing
Drying and curing of the product is affected by type, dryness and porosity of the surface, temperature, humidity, ventilation, climate conditions and application technique and therefore drying and curing can only be given as a guide.
It is a fast drying water based product. Expected curing at 25o
C at 50% RH: Touch dry - 4 to 6 hours per coat. Set - 12 hours. Full cure 36 to 72 hours. Ensure membrane is fully cured before tiling or topping.
Store in cool, dry area. Product is not flammable. Do not allow to freeze. Shelf life - about 12 months. Available in 4 & 15 Lt pails.
Wet spills can be cleaned with water, but spills should be avoided.
Tiling, Topping or Top Coating
It is compatible with most tile adhesives and 3:1 sand:cement beds.
Ideally the beds should be sealed / waterproofed to prevent the bed absorbing and holding water. Selection of the tile adhesive should be compatible with the flexibility of the substrate. Two pack adhesives systems are preferred. Tiling must be done in accordance with AS3958.1-1991 and adequate expansions joints installed.
Safety & Precautions
It is user friendly and safe to use if used correctly as intended. Nevertheless, protect eyes and skin and observe the safety precautions on the can and data sheet.
For full safety data refer to the products Material Safety Data Sheet. Observe precautions as per label.
Tests and Technical Data
It complies with AS4858:2004 Wet Area Membranes as tested by the CSIRO Test Report 2947 with a Class III High Extensibility classification. It complies with AS/NZ 4020:2002 Contact With Drinking Water.
Moisture Vapour Transmission: 0.26 g/sq.m./24 hours
Tensile Bond: 2N/mm after 14 days
Application temperature range: 10 to 35o
Elongation: > 300% (Class 111 Extensibility)