Deck Sealant/Waterproofer: Complete Buying Guide 2026
Deck sealant creates an invisible water-repellent barrier on wood surfaces. Clear sealants preserve the natural wood color while preventing moisture absorption, cracking, and graying from UV exposure. In 2026, deck sealant/waterproofer prices average $30.00 per gallon, with a typical range of $18.00 to $50.00 depending on your region, supplier relationships, and order quantity.
When budgeting for a project using deck sealant/waterproofer, factor in approximately 10% additional material for waste, plus labor costs averaging $15.00 per gallon for professional installation. A typical project using this material runs approximately $400 including both materials and labor.
With an expected lifespan of 3 years, deck sealant/waterproofer represents a cost of approximately $10.00 per gallon per year of service life. While the initial cost is competitive, budget for eventual replacement or refinishing.