Home -- EMSEAL Expansion Joints and Pre Compressed Sealants


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AST HI-ACRYLIC Multi-Use Farm Sealants

AST Hi-Acrylic tapes from EMSEAL are the ideal solution for many sealing needs.

Engineered for the harsh open farm environment, they seal, separate, dampen vibration, insulate and isolate a wide range of joints, seams, pads, flanges and other conditions found in farm structures and machinery.

AST is a self-adhering tape seal made from resilient, open-cell foam impregnated with a water-based acrylic-modified asphalt emulsion.  It replaces and outperforms liquid and butyl tape sealant and closed-cell closures.

AST Multi-Use Farm Sealant Product Data.pdf
AST Multi-Use Farm Sealant Installation Sheet.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.

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 grain-bin manufacturers, metal roof and building component manufacturers, architects and engineers and discerning erectors for more than 30 years.


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 nature of 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.

Standard & Special Sizes Available

Please contact EMSEAL (AST@emseal.com) for sizes to suit your specific application needs.

-AST Multi-Use Farm Sealants Product Data.pdf-      -INSTALL DATA .pdf-


Contact us @ techinfo@emseal.com or for

Specialty Sealant & Gasket Applications

Contact: Bob O'Hayer
PH: 207-853-3107    CELL:
717-926-4685
FAX: 610-743-8486

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