Hi-Acrylic seals hard-to-seal conditions in metal building applications.
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AST SAMPLE PACK
containing a sample and literature, call
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AST is a self-adhering tape seal made from resilient, open-cell
polyurethane foam impregnated with a water-based acrylic-modified
asphalt emulsion. It replaces and outperforms liquid and butyl
tape sealant and closed-cell closures.
Metal Building Sealants Product Data.pdf
AST sealant tapes are preformed, resilient, self-adhesive,
expanding tape seals made from an open-cell foam that has been impregnated with a
water-based, acrylic-modified asphalt emulsion and then compressed to a sealing density
level appropriate to the application. Typically, higher compression levels are required
for water-tightness in water run-off applications; lower compression can be used, for
example, for snow seals at roof ridges.
AST Sealant Tapes are used to seal out dust, air, wind-driven snow, and moisture
through joint details in metal buildings and similar structures, both pre-manufactured and
site-built. They are ideal as joint fillers in expansion/compression seals in joints that
are subject to movement from thermal expansion and contraction of a structure, and as
gasket-type seals in mechanically fastened, non-moving applications such as lap seams.
They are suitable for use
against metal, plastic trim, and other materials common in metal building structures.
Benefits of AST
Will not dry out and become hard or brittle.
The seals are UV-stable and
highly resistant to aging and vermin (bugs, rodents, birds, etc.)
Will not extrude from
between joints when squeezed, which is a possibility with caulk or butyl-type tapes.
May be used in non-moving
gasket-type applications as well as in moving expansion/contraction-type joints.
Material is supplied with
self-adhesive on one side. After removal of packaging, material begins gradual expansion -
more slowly in cold weather than in hot.
AST Sealant Tapes have been the sealants of choice of metal roof and building component
manufacturers and discerning erectors for more than 30 years. The products' quality has
earned EMSEAL long-term supply relationships with metal building manufacturers
worldwide--in the USA, Canada, New Zealand, and the United Kingdom.
How it Works - The EMSEAL Advantage
|The open-cell foam is
impregnated, compressed to the size of the opening to be sealed, and shipped in reels. The
stored strain-energy of compression in the foam means continuous back-pressure is exerted
against surfaces to be sealed.
||This pressure, combined
with the adhesive natureof the impregnation, assures reliable adhesion
to both upper and lower surfaces. As the sealed components and expand
with seasonal temperature changes, long-term sealing contact with the
contact surfaces is maintained.
Where to Use AST Hi-Acrylic
Use AST Hi-Acrylic in all applications where the
material will be allowed to expand to fill voids.
AST Hi-Acrylic is impregnated to higher density
and is capable therefore of providing a seal even when not fully compressed.
Used across panel contour at eaves, hips,
valleys, peaks, concealed gutters, etc., AST Hi-Acrylic provides a durable and
versatile solution to these typically difficult-to-seal areas.
Use small-size AST
Hi-Acrylic in flat-on-flat "gasket"
applications (side laps, end laps, and laps with closures) where the material will be held
at a high degree of compression by fasteners such as clips, screws, etc.
AST Hi-Acrylic in these
gasketing applications is an hard-working, long-lasting, high-performance alternative to butyl-tapes which generally squeeze out; or
to closed-cell materials which suffer compression set and additionally tend to dry out and
Standard & Special Sizes Available
Please contact EMSEAL (AST@emseal.com) for sizes to suit your specific
Metal Building Sealants Product Data.pdf-
-INSTALL DATA .pdf-