” – yes, it can. Deck sealers can provide a crucial layer of protection against moisture and UV damage, reducing the risk of rot and extending the lifespan of your deck. However, selecting the right sealer, performing regular maintenance, and practicing proper construction techniques are all vital components in preventing rot and maintaining the structural integrity of your deck. With the right precautions and diligent care, you can enjoy a beautiful and rot-free deck for years to come.