Stormdry should only be applied to dry, porous surfaces. It should not be applied to sealed or painted surfaces and is intended for aboveground use only. For the treatment of penetrating damp to be successful, it is essential to check all joint and roof connections. Hairline cracks up to 0.3mm can be 'bridged' by Stormdry, however, it may be necessary to fill cracks in brick/ stonework and repoint using a suitable sand/lime or sand/cement mortar incorporating a repointing moisture barrier. Dirty surfaces should be cleaned before the application of Stormdry Masonry Protection Cream to the recommendations given in BS8221-1:2000, "Code of practice for cleaning and surface repair of buildings. Cleaning of natural stones, brick, terracotta and concrete." DO NOT USE DETERGENTS.Test AreaStormdry has been formulated to be colourless once cured. However, very slight darkening may occur when it is applied to some substrates. Although this will usually fade over time, a small, representative and inconspicuous test area should always be treated before full treatment begins.
Carry out surface preparation as described above. Remove any loose mortar, dust etc… using a masonry brush.Stormdry can be applied by brush around details such as windows. Target coverage is 200ml/m2, dependent on the masonry characteristics. Care should be taken to ensure that Stormdry does not splash onto glass, paintwork, plants, etc…Larger areas can be covered more quickly using roller application. Stormdry can also be applied by electric roller or spray. Check for any “missed” areas that have not been treated (e.g. voids in brickwork, deep mortar beds) and apply Stormdry to these areas using a brush.Stormdry appears white immediately after treatment – making it easy to tell which areas have been treated.15-20 minutes after application, Stormdry starts to penetrate into the masonry. The masonry will be resistant to light rain after two hours.After 24-48 hours the wall will have returned to its original appearance.As Stormdry is formulated to penetrate deeply into masonry it can take up to two months after application for a noticeable “beading effect” to appear when rainfall strikes the wall.