The "Seal-Once Story" started with a white pine fence installed by accident. After almost 20 years, this original fence piece still repels water thanks to the unique polymer nanoparticles in Seal-Once waterproofer.

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Seal-Once Poly Blend Waterproofer is eco-friendly — perfect for waterfront decks.

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"The beauty of Seal-Once is that we are left with – what feels like – the natural beauty of the wood itself. The product literally disappears into the grain of the wood. We love the way our houseboat looks."

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These horse barns in New Ipswich, MA were coated on the exterior with Seal-Once custom blended tint color from Waters and Brown, Seal-Once dealer in Beverly and Salem, MA.

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Northshore MA home made beautiful with Seal-Once™ Poly Blend in Russet

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Historic homes located in Marblehead, MA were coated on the exterior with Seal-Once™ custom blended tint colors.

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Concrete paver driveway western Maine coated with two coats of Seal-Once™ Concrete & Masonry.

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WATERPROOFERS

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POLY BLEND

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TINTS

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100% POLY SEALERS

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CLEANERS

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INDUSTRIAL SEALERS

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SEAL-ONCE™ GREEN WATERPROOFERS, CLEANERS AND STAINS

Eco-Friendly Sealers and Cleaners

Waterproofers, sealers and cleaners for all wood, exotic wood, concrete, brick, masonry and composite decking surfaces

Seal-Once™ eco-friendly waterproofers provide long-lasting protection against water, mold and mildew stains. Safe for the environment, Seal-Once coating products are water-based, non-flammable and contain no VOCs, toxins or irritants. Available in clear or tinted formulas or specialized marine and industrial grades, Seal-Once provides long lasting, deep penetrating protection for up to 10 years on vertical surfaces, six years on horizontal surfaces. Seal-Once Poly Blend is formulated with aliphatic polyurethane for exterior and interior surfaces to create Seal-Once Poly Blend. The combination of Seal-Once and Poly increases abrasion resistance and provides additional UV protection to the semi transparent stains.

Seal-Once™ 100% Poly Sealers are single component, water-based aliphatic polyurethanes. With an elongation of 210%, these sealers are more durable with a harder film than acrylic sealers. Available in wood or concrete/masonry low VOC formulas.

Seal-Once Premium Concentrated Cleaners/Enhancers and Re-New Concrete Masonry rust remover/etcher provide extraordinary cleaning power without harsh chemicals. Seal-Once Cleaners are recommended to deep clean and prepare surfaces prior to applying any waterproofing or sealing product. To deep clean black mold on composite wood decking and bamboo, use our Mold Stain Eliminator Premium Deck Restorer.