Hydrotech Flex-Flash F is designed to be used as the standard reinforcement material for Hydrotech Monolithic Membrane 6125 roofing and waterproofing membrane. It is used to reinforce the membrane over cracks, construction joints and changes-in-plane. It is also used in between layers of MM6125 over the entire substrate area to form the “FR” or fabric reinforced assembly. Hydrotech Flex-Flash F is not intended to be used at drains and expansion joints, or as an exposed flashing.