Bostik Expanda Pro Foam/Pro Gun Foam Air Seals

Bostik Expanda Pro Foam/Pro Gun Foam are self-expanding polyurethane foam air seals used around window and door penetrations and other cladding fenestration trim cavities to assist with weathertightness and energy efficiency.

Bostik Expanda Pro Foam/Pro Gun Foam have been appraised for use as air seals around window and door penetrations and other cladding fenestration trim cavities in buildings within the following scope:

• The scope limitations of NZBC Acceptable Solution E2/AS1 paragraph 1.1 with regard to building height and floor plan area.
• Situated in NZS 3604 wind zones up to and including extra high.

Bostik Expanda Pro Foam/Pro Gun Foam have also been appraised as air seals with window and door joinery that is designed and manufactured in accordance with NZS 4211 situated in NZS 3604 wind zones up to and including extra high and where the cladding is an Alternative Solution and/or the building is outside the scope limitations of NZBC Acceptable Solution E2/AS1 paragraph 1.1. The weathertightness design of the window and door joinery penetrations and other cladding fenestration trim cavities in these situations has not been assessed and is outside the scope of this Appraisal.

• Expanda Pro Foam - High Yield, Low Expansion Multi-Positional PU Expanding Foam, version 1, 22 September 2014
• Expanda Pro Gun Foam - High Yield, Low Expansion PU Expanding Foam, version 1, 22 September 2014

Always refer to the Appraisal in full and the technical literature.