Seal Ends Once

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SEAL ENDS ONCE® deeply penetrates the surface to protect and stabilize the ends of cut wood against adverse weather and caustic conditions. SEAL ENDS ONCE uses proprietary nano-polymers to form a flexible breathable barrier to coat the wood cells and fibers, protecting against water damage.

SEAL ENDS ONCE preserves the integrity of the wood by inhibiting rot, decay, mold, mildew and fungi growth. It also stabilizes the wood, preventing warping and cupping.


Recommended Use:
Cut ends of all soft and hardwoods including:
Cedar Ipe Mahogany Cumaru Bamboo Timbersil Redwood Tigerwood Fir Pressure treated lumber




Product Details

  • Eco-friendly
  • Zero VOCs
  • Non-toxic; will not harm pets, plants or people
  • Non-film forming, flexible breathable barrier
  • Eliminates warping & cupping
  • Prevents wood rot & decay
  • Prevents mold, mildew & fungi growth
  • Stabilizes & protects wood
  • 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.
  • 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.
  • 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 of SEAL ENDS ONCE, wet on damp with sponge applicator or brush to all wood ends and cuts.
  • 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 SEAL ENDS ONCE immediately on dampened surface.
  • Do not use with other waterproofing products.
  • Wood can be painted or stained as soon as it dries in approximately 2-3 hours.


  • 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, sponges and brushes with warm soapy water.
  • Disposal: soap and water cleanup; no special disposal procedure needed.


Surfaces that have been treated with SEAL ENDS ONCE 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. SEAL ENDS ONCE will prevent and resist any water, mold and mildew penetration. Do not use oxidizers, corrosives, or strippers on surfaces that have been treated with SEAL ENDS ONCE.

Surfaces can be recoated with SEAL ENDS ONCE at any time. SEAL ENDS ONCE may need to be reapplied in places where the surface may have undergone noticeable changes.

Before reapplying SEAL ENDS ONCE, clean the surface using the recommended cleaning solution above. Apply SEAL ENDS ONCE according to package instructions. When reapplying in small areas, lightly overlap onto areas previously treated with SEAL ENDS ONCE.