Bostik Aquaprufe Damp Proofer & Waterproofer is a solvent-free, flexible, rubberised bitumen emulsion coating for interior and exterior surfaces, ideal for preventing water ingress in walls and floors. It can be applied to damp surfaces and does not require a primer. Two coats are needed to create a fully waterproof seal. This product is free from solvents, making it safe to use without a mask or needing to open windows. It covers up to 1.25 m² per litre for walls and up to 2 m² per litre for floors, resulting in a flexible emulsion coating that won't crack even with heavy usage. Once cured, it can be overcoated with plaster or flooring screed. The Cementone Aquaprufe Liquid Damp Proof Membrane is odourless and taint-free, making it suitable for both residential and commercial areas. Its cold-applied, bitumen-based composition simplifies the process, and it can be used on wood, plaster, and cement surfaces.