When applying a sealant, what should be done if air bubbles are noticed?

In the context of applying a sealant, if air bubbles are noticed, the appropriate response is to re-etch and apply new sealant. This is correct because air bubbles can compromise the effectiveness of the sealant, potentially affecting its adhesion and the overall quality of the seal. By re-etching the surface, you can ensure that it is properly prepared for the new layer of sealant, allowing for optimal bonding and effectiveness. This approach not only addresses the issue of the bubbles but also fortifies the integrity of the sealant application, thus enhancing protection against factors that could contribute to decay or damage.

Addressing the presence of air bubbles is an important step that ensures the longevity and reliability of the sealant. Taking hasty measures or leaving the bubbles as is could lead to future complications, making re-etching and reapplication the most effective solution.