What should seam sealer be applied to when replacing a damaged section of stretch-in carpet?

Applying seam sealer to both edges at each seam is crucial when replacing a damaged section of stretch-in carpet because it enhances the integrity and durability of the seam connection. Seam sealer helps to bond the edges of the carpet backing together, preventing fraying and unraveling over time. This application ensures that the seam is secure, reducing the risk of delamination and enhancing the overall appearance of the carpet.

In contrast, applying seam sealer to only one edge would not provide sufficient adhesion and could lead to issues with the seam lifting or separating. Sealing only around the perimeter or just the back of the carpet would not adequately address the seam's structural needs, potentially resulting in premature wear and failures in the carpet installation. Thus, the best practice is to apply seam sealer to both edges at each seam for optimal results.