Water-Based & Stainable End-Grain Sealant

WiseSeal® End-Grain Sealant is a specially formulated water-based sealer to protect fresh cut ends of boards. End cuts of decking and lumber dry out faster than the center, which can lead to unsightly end checks (drying splits) that can spread quickly. These end cuts also expose decking and siding material to the elements which require added protection to prevent water intrusion that can lead to swelling, mold, mildew, warping and cupping.

WiseSeal® is proven to increase the structural integrity of hardwood, thermally modified wood, soft woods, PT (pressure treated) and composite material.

Designed to protect decking, siding/cladding, railings, steps, log ends, turning blanks, and other exposed end grain. DeckWise® makes it easy to protect inventory and on-site material for long-lasting results. WiseSeal® is a durable water-based formula, eco-friendly and forms a flexible, breathable barrier by coating the wood fibers at the cellular level, providing exceptional protection. This product is paintable and stainable after 24 hours.

Treated with WiseSeal®

WiseSeal® protects the cut ends of boards by preventing water absorption. It can be used to preserve old or new wood, extending its natural life. It is non-film forming, non-yellowing and will not alter the natural beauty of the wood. It forms a flexible breathable barrier that allows the board to expand and contract and allow water vapor to escape.


  • Eco-friendly
  • Non-toxic; will not harm pets, plants, people or marine life
  • Ultra-low VOC
  • Water based
  • Flexible, breathable barrier
  • Stabilizes & protects wood
  • Helps resist warping & cupping
  • Inhibits wood rot & decay
  • Can be applied to damp surfaces
  • Soap and water cleanup

One 16 oz. container of end grain sealer covers approximately 30 ft2 of board ends. Due to differences in wood species, variety of climatic conditions, and an individual's usage methods; results are NOT guaranteed.

Wise Seal End Grain Sealant from DeckWise

Available Size: 16 Oz.
Container comes with a handy brush lid for easy application.

Seal All SIX Sides!

WiseCoat® Premium Hardwood Deck, Siding & Fence Sealer pairs perfectly with WiseSeal® End-Grain Sealer to protect all sides of wood decking and cladding. By sealing each side of the board, this reduces the likelihood of cupping, warping, cracking, and other changes that can diminish the beauty and structural integrity of wood over time. WiseSeal® End-Grain Sealer is also tintable with our WiseCoat® colorants!

DeckWise warranty emblem

DeckWise® WiseSeal® Limited Warranty

In order to be eligible to make a warranty claim, you must complete the registration for warranty here: www.deckwise.com/warranty/register.html

Applying WiseSeal®

The sooner our sealer is applied to exposed end grain (and face grain of turnings and carvings), the more effective the coating will be. Application is recommended to the wood within 24hrs of cutting.


Ensure thorough surface preparation prior to sealing for optimal penetration and performance. Eliminate any remnants of old coatings, dust, debris, and loose materials. Address oil, grease, algae, grime, mill glaze, and mold and mildew stains with suitable cleaners; we recommend using DeckWise® Wood Cleaner and Brightener.


  • 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 expected within 12-24 hours.
  • DO NOT THIN. Mix well. Stir contents or shake thoroughly prior to use.
  • Test a small area to ensure acceptable appearance and penetration.
  • Apply first coat to end cuts using a synthetic brush or stain pad.
  • Second coat can be applied once first coat has penetrated but is still damp. Second coat must be applied within one hour of applying first coat.
  • 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 WiseSeal® immediately on dampened surface.
  • Use only with other DeckWise® waterproofing products.
Paintable and stainable after 24 hours!
Ipe Seal Application

Seals Hardwoods, Thermally Modified Wood, Soft Woods & PT

  Coming Soon

Exceptional Results!

DeckWise Ipe Seal End Grain Sealer 5 Gallon Bucket

Excellent for PT (Pressure Treated) Material

Don't take for granted that pressure treated lumber
won't have split ends or checks!

DeckWise Ipe Seal End Grain Sealer 5 Gallon Bucket

Seal Composite Material Cuts

Prevent composite material cut ends from
moisture swelling and buckling at joints.

Drying Time

Allow approximately 2-3 hours for surface to dry, depending on temperature and humidity. Allow 12-24 hours for full cure, depending on temperature and humidity. When recoating, apply once previous coat has penetrated and surface is damp, not wet. Second coat must be applied within one hour of applying the first coat.

Cleanup & Storage

  • Clean all application equipment with warm soapy water.
  • Store above 32°F/0°C to protect from freezing.
  • Shelf life (unopened): 3 years.
  • Disposal

    Contact your local environmental regulatory agency for guidance on disposal of unused product. Do not pour down a drain or storm sewer.


  • Avoid breathing in spray. If inhaled, move to fresh air.
  • Avoid contact with eyes. If splashed into eyes, rinse with clean water for 15 minutes.
  • If skin irritation occurs, wash area with soap and water.
  • If accidentally ingested, immediately drink 2 glasses of water and contact a physician. Do not induce vomiting.
  • Wise Up! Protect Your Investment!

    Warranted to prevent long-standing water accumulation for up to 10 years on vertical & up to 6 years on horizontal surfaces. Not recommended for concrete driveways or garage floors.

    WiseSeal Water Based Endgrain Sealant, 16 Oz. Container w/ Brush Lid

    For more information about WiseSeal®, contact us online or call us directly at 941-896-9851.

    End-Grain Applications:

    • Deck Board Ends
    • Siding & Cladding Ends
    • Logs & Turning Blanks
    • Railing & Step Ends

    Physical Characteristics:

    • Color: Milky white liquid, dries clear
    • Flash Point: None
    • pH: 7+
    • Solvents: Water
    • lbs/gal: 8.5
    • Specific Gravity: 1.019
    • Viscosity: 50 cps
    • Application Temp.: 45°F/7.22°C* - 95°F/35°C
    • Odor: Nil
    • VOC Content: 25g/L**
    • *Do not apply when air or surface temperature is below 45°F/7.22°C or may fall below 45°F/7.22°C within 24 hours after application.
    • **VOC Content determined via EPA Method 24.
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