Stormdry Masonry Protection Cream

Stormdry is a colourless, breathable, water-repellent treatment for brick, concrete and Stone Walls. It is supplied in the form of a deeply penetrating cream that is applied to the wall surface using a roller or brush. Once Stormdry has been applied to the wall surface, it will permeate deeply before curing to form a water-repellent barrier. Typical applications for Stormdry include:

Protecting against penetrating damp (rain penetration)
Improving the thermal resistance of masonry by keeping it dry (energy saving)
Improving the performance of cavity wall insulation by protecting it from moisture
Improving flood resistance of masonry

Stormdry is based on carefully selected silanes and siloxanes which line the pores of the masonry to form a water-repellent silicone matrix. Because it works by lining the pores rather than blocking them the masonry is allowed to breathe and does not suffer from increased frost damage (spalling). Due to its novel formulation and deep penetration, Stormdry is resistant to UV light and other forms of degradation, resulting in a life expectancy of 20 - 30 years.

Stormdry is able to penetrate more deeply into masonry than traditional liquid-applied masonry water repellents. As well as increasing life expectancy this also improves Stormdry s crack-bridging ability. As the diagram to the right shows, Stormdry is able to provide water-repellency beyond the depth of small cracks.

It should be noted that larger cracks will still need to be filled as part of the Stormdry treatment. Mortar lines may need to be repointed with a Sand/Cement or sand/lime mix incorporating Stormdry Repointing Additive.

Stormdry has been tested to BS EN ISO 15148:2002 (E), demonstrating its effectiveness on concrete, mortar, brick, and Sandstone. The graph below shows that the water uptake for Stormdry treated samples was considerably lower than for untreated samples:

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. However, Stormdry is resistant to rain after just 12 hours.