Specification

Product Description
Vycor
®
Pro flashing is composed of a durable, tear and puncture
resistant engineered polypropylene backing film, paired with an
aggressive, non-asphaltic, proprietary butyl-modified adhesive.
Vycor
®
PRO flashing comes in 75  rolls and is available in:
• 4 in. (102 mm)
• 6 in. (150 mm)
• 9 in. (225 mm)
• 12 in. (305 mm)
Features & Uses
Superior adhesive capabilities — Non-Asphaltic, proprietary
butyl-modified adhesive seals and adheres to the substrate
creating a best-in-class barrier against air and water intrusion.
Seals around fasteners — The specially formulated adhesive
seals around fasteners, preventing water penetration.
Forms water-tight laps — Vycor
®
PRO’s superior adhesion
properties ensure strong overlaps.
Highly Conformable — Thin and pliable membrane is easily
worked into tight details.
Wide application window — Primerless adhesion to wood
sheathing from 25°F (4° C)
Wide Service Temperature Window — Suitable for in-service
conditions up to 176° F (80° C)
Long exposure time — 120 days of exposure provides
protection over long, unpredictable construction cycles
Flexible Application — Vycor
®
PRO’s wide performance window
makes it appropriate for use in all regions
Easy to work with — This high performance barrier membrane
is easy to apply with 6 and 12 inch (150 mm and 305 mm)
measurement markings.
Superior Weather Protection Solution — Use in combination
with Vycor
®
enV-S
™
or Vycor enV
®
fully-adhered weather barriers
to provide superior protection from wind driven rain.
Compatibility
• Vycor
®
Pro flashing contains no asphalt, and is fully compatible
with rigid and flexible PVC window nailing flanges.
• Compatible with common weather resistive barriers and
many types of sealants. Refer to Technical Letter 1, Chemical
Compatibility with Other Building Materials and Sealants for
more information.
Usage
Vycor
®
PRO flashing is a unique solution appropriate for working
around a number of detail areas, including, but not limited to:
• Window and door openings (headers, sills, jambs, thresholds,
nailing flanges)
• Deck-to-wall intersections
• Corner boards
• Wall-to-wall tie-ins
• Foundation sill plates
• Sheathing panel seams
• Under stucco finishes
• Masonry walls
• Application to EPDM in vertical applications
• Other non-roof detail areas
Application Instructions
Apply in fair weather to clean and dry surface at air temperatures
of 25°F (4°C) or higher. Apply directly to substrate. Compatible
substrates include wood, plywood, oriented strand board, exterior
gypsum, metal, concrete and masonry. Install Vycor
®
PRO flashing
with weather-resistive barriers to form water-shedding laps.
Cut membrane to length. Peel back release liner. Align membrane
and press into place. Mechanically fasten membrane at vertical
terminations as necessary. Press or roll into place with hand roller
to achieve best adhesion. Primer is generally not required for most
substrates (including plywood, OSB, dimensional lumber, PVC
window flanges, steel, and aluminum) provided they are clean
and dry. On concrete, masonry and glass fiber surfaced gypsum
sheathing apply Perm-A-Barrier
®
WB Primer at a coverage rate of
250–350 
2
/gal (6–8 m
2
/L). Regardless of substrate, if adhesion
is found to be marginal, prime substrate material with Perm-A-
Barrier
®
WB Primer at the same coverage rate.
Precautions & Limitations
SLIPPERY — DO NOT install on the roof. Do not leave
permanently exposed to sunlight. Maximum recommended
exposure is 120 days. May be applied to EPDM in vertical
applications. Some caulks containing high levels of hydrocarbon
solvents may be incompatible with the adhesive in Vycor
®
PRO
flashing. Check with the caulk manufacturer or your local GCP
Applied Technologies technical sales representative and/or refer
to Technical Letters published on the GCP Applied Technologies
web site.