Seal-Once Custom Semi-Transparent Exterior Wood Stain & Waterproofer

Clear Waterproofer by SEAL-ONCE offers an innovative solution for protecting and preserving exterior wood and concrete surfaces. Combining the trusted performance of an oil-based product with the eco-friendly qualities of a water-based formula, this advanced wood sealer penetrates deep to create a flexible, breathable barrier that defends against cracking, warping, mildew, and water damage. It dries clear to maintain the natural grain and beauty of wood, making it ideal for decks, fences, outdoor furniture, and siding. This product can be customized by pairing the clear version with any of the Tint Concentrates. Mix-and-match to make your own colors!

Designed for modern wood types like thermally modified wood and tropical hardwoods, Clear Waterproofer delivers fast, effective moisture protection within just four hours of application. It’s safe to use around people, pets, and plants thanks to its low VOC content and minimal odor, making it an excellent choice for conscientious homeowners. Easy to apply with a synthetic brush, sprayer, or pump-up sprayer, it covers up to 350 square feet per gallon, depending on surface porosity.

Preparation is key—clean the surface thoroughly and remove any old coatings using SEAL-ONCE Multi-Surface Cleaner and Wood Brightener to ensure optimal absorption and performance. With proper application, Clear Waterproofer seals and protects wood surfaces for up to four years, helping them age gracefully without compromising structural integrity. Whether you’re treating new installations or restoring older ones, this clear finish delivers long-lasting resilience, beauty, and peace of mind.

• Create custom colors by mixing the clear version with any Tint Concentrate for a personalized finish.
• Eco-friendly water-based formula combines performance with low environmental impact
• Creates a breathable, flexible barrier that prevents cracking and warping
• Dries clear to preserve and enhance natural wood appearance
• Moisture resistance begins within just four hours of application
• Ideal for decks, fences, siding, and outdoor furniture
• Safe for use around people, pets, and plants due to low VOCs and low odor
• Designed for use on thermally modified wood and tropical hardwoods
• Penetrates deep to stabilize wood and protect against decay
• Covers up to 350 square feet per gallon depending on surface porosity
• Should be applied after surface is cleaned and prepped for best results
• Apply using a brush, sprayer, or pump-up garden sprayer
• Protects and seals wood surfaces for up to four years