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Spray Foam is made of two chemicals that when combined, create foam instantly. A byproduct of this exothermal reaction is strong fumes requiring appropriate ventilation during, and sometimes after, application. This ventilation process takes 12-24 hours before re-entry. Depending on the scope of work, you may not be able to occupy the building during installation. Properly applied spray polyurethane foam will not have lasting odor.
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