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Comes in a liquid spray form that quickly foams and hardens.- May have a higher insulating value than blown-in materials, but is more expensive and still subject to shrinking.
- For use only on closed, properly vented exterior wall cavities. It should be sealed from exposure to the interior with vapor- and fume-resistant paints.
- Also suited for sealing cracks around windows, doors and constructions seams.
- Best for professional installation.
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