Full Product Manual
In addition, Grace Vycor
®
PRO’s wide application and service
temperature windows make it appropriate for use in any environ-
ment.
Product Description
Vycor
®
Pro ashing is composed of a durable, tear and puncture
resistant engineered polypropylene backing lm, paired with an
aggressive, non-asphaltic, proprietary butyl-modied adhesive.
Grace Vycor
®
PRO ashing comes in 75 ft 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-modied 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—Grace Vycor
®
PRO’s superior adhe-
sion properties ensure strong laps, even at the seams of the
ashing.
• 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 protec-
tion over long, unpredictable construction cycles
• Flexible Application—Grace 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 Grace Vycor
®
enV-S
™
or Grace Vycor enV
®
fully-adhered
weather barriers to provide superior protection from wind
driven rain.
Compatibility
• Vycor
®
Pro ashing contains no asphalt, and is fully compatible
with rigid and exible PVC window nailing anges.
• 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
Grace Vycor
®
PRO ashing is a unique solution
appropriate for working around a number of detail areas, includ-
ing, but not limited to:
• Window and door openings (headers, sills, jambs, thresholds,
nailing anges)
• Deck-to-wall intersections
• Corner boards
• Wall-to-wall tie-ins
• Foundation sill plates
• Sheathing panel seams
• Under stucco nishes
• 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. Compat-
ible substrates include wood, plywood, oriented strand board,
exterior gypsum, metal, concrete and masonry. Install Grace
Vycor
®
PRO ashing 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 gener-
ally not required for most substrates (including plywood, OSB,
dimensional lumber, PVC window anges, steel, and aluminum)
provided they are clean and dry. On concrete, masonry and glass
ber surfaced gypsum sheathing apply Perm-A-Barrier
®
WB
Primer at a coverage rate of 250–350 ft
2
/gal (6–8 m
2
/L). Regard-
less of substrate, if adhesion is found to be marginal,
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