For roof coating systems, Henry 107 type emulsions are typically expected to form a continuous water resistant film, adhere to prepared roofing substrates, and provide protection against weathering when used within the intended assembly. Performance requirements include resistance to light ponding water within limits, compatibility with reinforcement fabrics, acceptable drying time, and film integrity without pinholes or excessive cracking. They also need workable viscosity for brush or spray application and good coverage per unit area at recommended thickness. Actual durability depends on proper surface preparation, correct coat thickness, and using compatible topcoats if UV exposure is significant.