Multi-Surface Concentrate with NANO GUARD

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SEAL-ONCE® Multi-Surface Concentrate with NANO GUARDTM deeply penetrates the surface to protect and stabilize wood, concrete and masonry against weather and caustic conditions. It uses proprietary nano-polymers to create a long-lasting flexible breathable barrier to provide protection from the inside out.

Multi-Surface Concentrate with NANO GUARD will not alter the original appearance of the wood, concrete or masonry, and it allows wood to age naturally over time. It can also be mixed with any of our available Semi-Transparent Tints to enhance the appearance of your project.

Recommended Use:
Decks Docks/Piers Railings Cedar Shakes Siding Clay Tiles and Shingles Outdoor Furniture and Play Structures Fences Planters Log Homes Structural Framing Pavers and Bricks Poured or Stamped Concrete Stucco Limestone Slate Tile (unglazed)




Product Details

  • Eco-friendly
  • Zero VOCs
  • Non-toxic; will not harm pets, plants, people or marine life
  • Non-film forming
  • Non-yellowing formula
  • Flexible breathable barrier
  • Prevents warping, cupping, wood rot & decay
  • Prevents cracking & spalling
  • Prevents mold, mildew & fungi growth
  • Stabilizes & protects wood, concrete and masonry
  • Soap & water clean-up


  • All surfaces should be cleaned before sealing for best penetration and performance.
  • Clean all dust, debris and loose material. Remove oil, grease, algae, grime, mill glaze and mold and mildew stains with appropriate cleaners. Recommend SEAL-ONCE All Wood Cleaner or SEAL-ONCE Concrete/Masonry Cleaner.
  • Test absorbency after cleaning by sprinkling water on surface. If the water does not readily penetrate the surface, stripping will be necessary to remove old coatings before applying Multi-Surface Concentrate with NANO GUARD.
  • Do not use if air or surface temperature is below 45°F/7.22°C or above 95°F/35°C.
  • Do not apply in rain or when rain is imminent.
  • DO NOT THIN. Mix well. Stir contents or shake thoroughly prior to use.
  • Apply two coats wet on damp with a brush, pump-up garden sprayer, air-assisted and/or airless sprayer.
  • Use 17-19 tip and medium to coarse spray pattern. Brush out any puddles.
  • For best results, apply in the shade and out of direct sunlight.
  • When applying in direct sunlight and wood surface is hot, spray with a mist of water and apply Multi-Surface Concentrate with NANO GUARD immediately on dampened surface.
  • Apply to all surfaces. Apply SEAL ENDS ONCE® to wood ends.
  • Do not use with other waterproofing products.
  • Wood can be painted or stained as soon as it dries in approximately 2-3 hours, if SEAL-ONCE Semi-Transparent Tints are not being used.


  • Allow approximately 2-3 hours depending on temperature and humidity before subjecting surface to light foot traffic.
  • Allow 12-24 hours for full cure, depending on temperature and humidity.
  • When recoating, apply as soon as previous coat has penetrated and surface is damp, not wet.
  • Clean sprayer equipment and brushes with warm soapy water.
  • Disposal: soap and water cleanup; no special disposal procedure needed.


Surfaces that have been treated with Multi-Surface Concentrate with NANO GUARD can be cleaned using a mixture of 1 gallon warm water, 14 oz. bleach, and 1 oz. of Dawn® dish detergent. Apply this cleaning solution with a sprayer and allow to sit for 20 to 30 minutes on the wood surface before rinsing with water using a garden hose with a nozzle.

This cleaning solution can be used to remove airborne mold and mildew stains, dirt and grime from the wood surface. Multi-Surface Concentrate with NANO GUARD will prevent and resist any water, mold and mildew penetration. Do not use oxidizers, corrosives, or strippers on surfaces that have been treated with Multi-Surface Concentrate with NANO GUARD.

Surfaces can be recoated with Multi-Surface Concentrate with NANO GUARD at any time. Multi-Surface Concentrate with NANO GUARD may need to be reapplied for fading tint color, surface damage, in heavily worn or high traffic areas, or in places where the surface may have undergone noticeable changes.

Before reapplying Multi-Surface Concentrate with NANO GUARD, clean the surface using the recommended cleaning solution above. Apply Multi-Surface Concentrate with NANO GUARD according to package instructions. When reapplying in small areas, lightly overlap onto areas previously treated with Multi-Surface Concentrate with NANO GUARD.