HydroGap® SA is the first and only self-adhered WRB (Water Resistive Barrier) to incorporate a true drainage space. The 1mm spacer technology combined with a fully-continuous breathable acrylic adhesive provides an unmatched air and moisture barrier.
HydroGap® SA is a water resistive barrier for use under many different types of siding. It is especially good when used behind exterior foam insulation.