Everlastic® MF-40, A 40 mil self adhering membrane
composed of 32 mils rubberized asphalt adhesive bonded to 8 mil polyethylene film.
Everlastic® MF-40 is a
tough, self-adhering, self-healing composite membrane masonry flashing. When in place the
membrane provides a barrier against water, air and vapor diffusion. Mechanical fastening
through membrane will not destroy integrity.
Everlastic® MF-40 Masonry Flashing complies with
Volatile Organic Compound (VOC) regulations.
Flexibility and self-adhering nature of membrane allows for simple,
positive and integral installation and field fabrication of splices, end dams, etc.
Everlastic® MF-40 Masonry Flashing provides a continuous bond to most substrates and is
impervious to water and air penetration. The membrane does not age harden, remains
flexible over wide temperature ranges and is able to bridge small cracks.
Do not apply membrane in areas where it may be permanently exposed to the
sunlight. Membrane is not compatible with fresh coal tar or coal tar pitch and
sealant products containing polysulfide polymers. The use of thin-set tile systems
with membrane is not recommended. Provide sound, clean and dry substrate for
surfaces to receive membrane. Install when air and surface temperatures are 25°F and
System: The masonry flashing membrane system consists of a
membrane, adhesive and sealant. The membrane is a self-adhesive, cold-applied sheet
composed of rubberized asphalt adhesive bonded to a polyethylene film. All end and side
joints are sealed with a sealant.
Size: Everlastic® MF-40 is supplied in 18-inch wide rolls in
100 foot lengths and
packaged 2 rolls per carton. Release paper protects the adhesive side until use.
General: Install Everlastic® MF-40 membrane in masonry at shelf
angles, lintels, ledges and other obstructions to the downward flow of water in the wall.
Ensure masonry surfaces are smooth and free from projections that could puncture
membrane. Seal penetrations in membrane with adhesive and sealant. Prime substrate with
MF-40 Adhesive where existing conditions compromise membrane adhesion.
At cavity masonry walls: Extend membrane 1/2 inch back from exterior face of outer
wythe of masonry through the outer wythe turned up a minimum 4 inches and tuck into bed
joint of the inner wythe.
At masonry veneer walls: Extend membrane from exterior face of veneer through the
veneer up face of sheathing at least 8 inches and behind barrier.
At lintels and shelf angles: Extend membrane a minimum of 4 inches into masonry at
each end. At heads and sills extend membrane 4 inches at ends and turn up not less than 2
inches to form pan. Hold membrane back 1/2 inch from face. Use flashing drip to extend