Priming and 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.
On porous surfaces, the recommended primer is Primeseal MC, although in some applications where the moisture content of the surface is very low, Multiseal may be used.
If there is any risk of entrapped moisture in the surface, which can cause the membrane to bubble, then Primeseal MC must be used. Primeseal MC may be applied to slightly damp surfaces but freedom from surface water and continual dampness is essential as the product will not dry if the surface remains damp.
Apply Primeseal MC at the minimum rate of 4 sq.m. per litre so that the area has a uniform and complete coverage. Allow to fully cure before applying the Multithane HV liquid membrane.
Apply Multiseal at the rate of 4 sq. m. per litre, allow to cure and apply
within 48 hours. Ideally, surface should be primed on one day and the membrane applied the following day.
Note: Excessively porous areas may require an additional coat.
In ideal circumstances,
can be used without primer, provided the recommended minimum dry film thickness is achieved.
Corners, Joins, Cracks, Gaps, Penetrations and Angles
To wall/floor corners, wall/wall corners and around penetrations apply a suitable polyurethane joint sealant/mastic to form a fillet. Joins, cracks, gaps and flange surrounds must be filled and sealed with a suitable polyurethane joint sealant/mastic.
Plastic and metal angles should be firmly embedded in a bed of polyurethane joint sealant/mastic that is gap free.
Waste outlets (pipes, flanges) should be rebated into the surface to allow water to readily drain.
Expansion joins should be filled and sealed with a suitable polyurethane joint sealant/mastic and allowed to cure. A bond breaker tape should be laid over the join and then waterproofed using
with reinforcing fabric embedded in the membrane.
by brush, roller, broom and squeegee in a minimum of two coats, usually a day apart so that the minimum dry film thickness in 1.2mm. Where no primer is used, an additional coat of
is recommended. The minimum wet coat thickness per coat is 0.5mm.
is used with a reinforcing fabric (say joins or upturns), the application consists of applying a base coat of
, laying the fabric into the wet coat, applying a saturation coat of
, working it well into the fabric so that the fabric is entirely saturated and covered, without wrinkles or bubbles, and allowed to cure. Apply one or two further coats of
over the area.