Bostik Rito penetration primer for roofs is a general purpose primer for steel, slate, concrete, asbestos cement, asphalt, corrugated iron etc.
It is often essential as a surface treatment prior to use of bituminous adhesives, solutions, emulsions and flashing strips
It is designed to penetrate and seal porous surfaces before application of waterproof protective systems. Available in 5L and 22.5L
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