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Insulation Seals Without Added Barrier

Friday, January 24, 2014

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FireStop2, new from Gaco Western, is reportedly the first single-application, open-cell, spray-foam insulation that requires no additional ignition barrier, according to the manufacturer.

Unlike spray-foam insulations that require an ignition barrier coating as a second step, GacoFireStop2's one-step application yields a sealed product that can be left exposed in an attic or crawl space and meet code requirements, the company says.

Photos: Gaco Western

The open-cell foam reportedly adheres to most building materials and provides a continuous barrier against air infiltration for the life of the building.

The product yields up to 15,000 board feet and features improved sprayability and rise, excellent adhesion, and easier trimming when compared to the original GacoFireStop, launched in 2011.

GacoFireStop and the updated version meet the requirements of International Code Council Evaluation Services AC377 Appendix X for use in attic and crawl spaces without an additional ignition barrier, the company says.

Additional Features

The water-blown spray-applied system cures to a distinctive orange-colored semi-rigid low-density foam, according to the product literature.

It adheres to most building materials and forms a completely sealed air barrier in wall cavities, attics and crawl spaces, Gaco Western says.


GacoFireStop2 cures to an orange-colored, semi-rigid, low-density foam.

The system does not contain CFCs, HCFCs, formaldehyde or ozone depleting chemicals and is Class 1 fire rated, the company says.

Founded in 1955, Gaco Western offers a variety of products, including specialty coatings for roofs; pedestrian and traffic decking; and spray polyurethane foam insulation, for commercial, industrial and residential applications.

More information:


Tagged categories: Air barriers; Building envelope; Coating chemistry; Fire; Gaco Western; Insulation; Spray foam; Spray polyurethane foam

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