Sika Top Seal 501

Permanent Waterproofing: The crystalline action provides a long-lasting and durable barrier that becomes an integral part of the concrete. The process can be reactivated by contact with water, providing continuous protection. ​Effective Against Positive and Negative Pressure: SikaTop-501 is highly effective in resisting water pressure from both the positive (water pushing in) and negative (water pushing out) sides of a structure, making it a versatile solution for a wide range of applications. ​Easy to Apply: The product is a pre-batched powder that is simply mixed with water and can be applied with a brush or trowel. It has a good working time, allowing for proper application.