 AST
HI-ACRYLIC
Metal Roof and Multi-Use Building Sealant
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.
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.
Product Uses
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. |
