Berger Roof Compound Clear 10LBerger Flexible Roof Compound is the only real solution to leaking roofs. It expands and contracts to give your roof the ultimate protection in all weather conditions. Can be applied onto all types of masonry and concrete. Simply apply two coats and forget it. It covers the fine cracks developed on the roofs, sloping during curing and ageing of concrete. It does not allow the water to pass through the film thus stopping the water leakage. Flexible