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Ronseal Isoflex Liquid Rubber Black is a high-performance liquid rubber product designed to provide a seamless, watertight seal for all manner of roofs. It offers superior weatherproofing, preventing leaks and resisting cracking or peeling under the harshest of weather conditions. This 2.1-litre variant is easy to apply and dries to form a flexible, black layer that not only protects your roof but also enhances its aesthetic appeal.