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EERE » BTO » Building America » Solution Center Home » Image Gallery » Step 3. Apply urethane sealant around the duct or pipe in the retrofitted exterior wall.

Step 3. Apply urethane sealant around the duct or pipe in the retrofitted exterior wall.

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Building America Solution Center is a resource of the U.S. Department of Energy's Building Technologies Office.
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ENERGY EFFICIENCY AND RENEWABLE ENERGY

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