Polystick roof underlayments feature our revolutionary ADESO® Technology, a patented method of manufacturing dual-compound self-adhesive membranes featuring enhanced lap sealing, designed to provide unmatched waterproofing across a wide range of roofing applications. This unique formulation includes an aggressive self-adhering bottom layer coupled with one of several types of top surfaces, depending on the application and waterproofing needs. No other underlayment on the market is made with this unique formulation, and none can surpass its level of protection.