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The IKO Hyload Original Damp Proof Course 225 mm x 20 m is a flexible polymeric sheet designed to prevent the upward and downward passage of moisture through solid and cavity masonry walls in new build and refurbishment projects. This high-performance damp proof course can be laid horizontally, vertically or formed into cavity trays to control water ingress at wall junctions, helping protect brickwork, blockwork or stonework from damp issues. Proven in use for decades and supplied in a durable black sheet form, it offers excellent flexibility at low temperatures and maintains integrity under heavy compressive loads for long-term performance in external wall applications.