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What will happen if the backer rod is punctured?

April 26, 2017backer punctured Rod

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What will happen if the backer rod is punctured?

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Contractors are concerned with punctured closed cell backer rod because out gassing of the backer rod can occur. This will appear as bubbles in the sealant which may shorten the service life of the sealant. Contractors get call backs for bubbles in the cured sealant when the closed cell backer rod is ruptured during insertion into the joint reservoir. Usually this condition causes the gas from within the ruptured cells to create bubbles in the soft uncured sealant. To avoid this condition SOF® ROD or Dual Rod® is specified.