Hydrashell® Max-Grip is a high-performance, self-adhesive roofing underlayment engineered for superior protection against ice and water intrusion. Built with a durable glass mat carrier and coated with a premium blend of SBS polymers, asphalt, and additives, it delivers the perfect balance of flexibility and toughness. Its sanded top surface allows for confident foot traction during installation, while the underside features a highly adhesive asphalt layer protected by a silicon-based release film for a clean, efficient application.
This vent keeps your system performing at its best by promoting efficient airflow to reduce lint buildup and excess heat, helping prevent moisture damage inside the home. Its enclosed design works to keep out insects, critters, and rain, while the removable cap makes cleaning and maintenance simple and fast. With leak-prevention features built into the design, it helps reduce customer call-backs and gives installers a dependable solution they can trust on every shingle roof application.
Maximum Load (ASTM D2523): 4.4 KN / m
Elongation at Break (ASTM D2523): 10%
Adhesion to Plywood at 4°C (ASTM D903): 0.92 KG/30.5 cm
Adhesion to Plywood at 23℃ (ASTM D903): 5.44 kg/30.5 cm
Thermal Stability (ASTM D1204): 3 mm
Flexibility Temperature (ASTM D1970): -29℃
Tear Resistance (ASTM D4073): 89 N
Waterproof Integrity of Lap Seam (ASTM D1970): Pass
Sealability Around Nail (ASTM D7349): Pass
Moisture Vapour Permeance (ASTM E96): 5.7 ng/Pa.S.M²
Slip Resistance (ASTM D1970): Pass
Calculate the exact amount of ventilation needed for a well-balanced system.
