Resisto Joist Guard 4-in x 75-ft Black Joist Waterproof Membrane

Extend the life of your deck in one easy step with the Resisto Joist Guard waterproof membrane. This self-adhesive membrane helps to prevent rotting of structural timbers under decks and balconies. It’s easy to install on most decking materials, including treated wood and composite materials.

• A self-adhesive membrane composed of elastomeric bitumen
• Compatible with most decking materials, such as treated wood and composite materials
• Easy installation at any temperature
• Pattern-free, black membrane, thus unnoticeable through the decking
• Self-sealing membrane around fasteners
• Excellent flexibility
• Substantially extends the service life of the deck at low cost