How can polyurethane be effectively used to protect and enhance the durability of decks?

Polyurethane can be effectively used on decks to protect and enhance durability by creating a strong, waterproof barrier that resists wear and tear from foot traffic, UV rays, and moisture. Applying multiple coats of polyurethane can provide a long-lasting finish that helps prevent cracking, fading, and rotting of the wood, ultimately extending the lifespan of the deck.