Decklack

Decklack is a protective coating applied to outdoor wooden decks to form a durable film that protects against moisture, UV radiation, and wear. It is typically used on new or refurbished decks to seal the wood and improve longevity. Decklacquer products are primarily resin-based and are available in solvent-based or water-based formulations. Common resin systems include polyurethane, urethane-modified alkyd, and acrylics; there are both clear varieties and tinted or pigmented options. Water-based lacquers tend to have lower odor and easier cleanup but may require more coats for the same film build, while solvent-based lacquers often offer higher abrasion resistance but contain higher VOCs.

Application and preparation are key to durability. The deck must be clean, dry, and free of old coating, and weathered boards should be sanded. Primers may be required for bare wood. Typically two coats are recommended, with light scuff sanding between coats. Drying times depend on product and climate; avoid applying in rain and within the manufacturer’s recommended temperature range. Recoat intervals vary but commonly range from 2 to 5 years, depending on exposure and foot traffic. Regular cleaning and inspection help prevent peeling and water intrusion.

Advantages and limitations: Decklacquer provides a hard protective film with good moisture and wear resistance and can be clear or colored. It can be more resistant to peeling than some oil-based finishes but may peel or crack if applied over improperly prepared wood or if boards experience significant movement. It generally requires more maintenance than penetrating oils in harsh climates.

Safety and environment: Many solvent-based lacquers emit VOCs and require ventilation and personal protective equipment during application. Disposal should follow local regulations. Low-VOC or water-based formulations are increasingly common.

See also: Deck stain, deck sealant, wood finish.