Seal-Once Marine Grade Pre-Mixed Semi-Transparent Premium Wood Stain & Sealer

Seal-Once Marine Grade Semi-Transparent Premium Wood Stain & Sealer is engineered to protect exterior wood in the toughest conditions, including near open water. This high-performance, water-based formula penetrates deeply to create a flexible, breathable barrier that shields against moisture, UV fading, and water damage, helping wood age and gray naturally without decay. With ultra-low VOCs and no harmful impact on aquatic life, it's a safer, eco-conscious choice for families, pets, and the environment. This product can be customized by pairing the clear version with any of the Tint Concentrates. Mix-and-match to make your own colors!

Ideal for decks, docks, fences, and siding, it can also be used independently as an end grain sealer for extra protection on wood ends. The product begins repelling water in as little as four hours and is abrasion-resistant to handle heavy use. Application is easy—just clean the surface thoroughly, test for absorbency, and apply with a brush or sprayer. A second coat can be added while the first is still damp, ensuring complete coverage and long-lasting performance. Coverage varies based on surface porosity, with one gallon covering up to 350 square feet per coat.

Seal-Once Marine Grade Stain & Sealer is designed to last up to 10 years on vertical surfaces and 6 years on horizontal surfaces, delivering durable beauty without sacrificing environmental safety. Whether you're restoring an aging dock or sealing new wood siding, this product offers premium protection with peace of mind.

• Create custom colors by mixing the clear version with any Tint Concentrate for a personalized finish.
• Designed for harsh coastal environments and exterior wood near open water
• Water-based and ultra-low VOC for eco-friendly, safer use
• Penetrates deeply to form a flexible, breathable barrier
• Helps prevent water damage, cracking, and UV fading
• Allows wood to age naturally without decay
• Begins repelling moisture within just four hours
• Ideal for decks, docks, fences, and siding
• Can be used as a standalone end grain sealer
• Safe for use around people, pets, plants, and aquatic life
• Easy application with brush, sprayer, or pump-up sprayer
• Second coat should be applied while first coat is still damp
• One gallon covers up to 350 square feet per coat
• Protects wood for up to 10 years on vertical and 6 years on horizontal surfaces