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Bostik Brushable Waterproofer for Roofs is a heavy brush coating for waterproofing and resealing new and existing roofs. You can apply it on all common roofing surfaces including mastic asphalt, roofing felt, corrugated iron, fibre cement, slates, lead, copper and zinc.
• Solvent based so ideal when frost or rain means a water-based waterproofer is unsuitable