Finalsan Organic & Captain Jack's Deadweed Non-Selective Weed Killer

Unfortunately we do not ship to California addresses

Price
$19.50
Size:

Captain Jack's Deadweed & Finalsan Organic Weed Killers


OMRI Listed (Finalsan Only)

NOW WITH FREE SHIPPING INCLUDING 250 GALLON TOTE!!
(Excludes 2.5 Gallon Finalsan)

Product may ship as either Captain Jack's Deadweed Brew or Finalsan. 

Finalsan® and Captain Jack's Deadweed Brew® (Formerly BurnOut Formula II® are patented fast-acting weed, grass, algae, and moss killers that represent a new class of products for organic weed control that do not contain glyphosate or other toxic chemicals!  Utilizing concentrated and potent and non-staining fatty acids (soaps), Finalsan and Captain Jack's Deadweed Brew are non-selective herbicides and the best new top-of-the-line technology for fast-acting and through killing or suppression of many common annual, biennial, and perennial weeds, algae and mosses. A great organic product for use when conventional herbicides are banned or not desired!

How Do Finalsan & Captain Jack's Deadweed Brew Work?

Herbicidal soaps work by penetrating the waxy cuticle of plants, causing theFinalsan Organic Non-Selective Weed Kille RoundUp Alternative plant to dehydrate and die. The active ingredients accumulate in plants and cause intracellular damage, leading to cell death. Activity is non-selective and will kill plants the soap comes into contact with, but will not translocate to underground portions of the plant or harm the bark of mature, woody plants.  Can be safely sprayed around the base of trees, shrubs, hops, grapes without worry.  

Use on weeds within vegetable and flower gardens, landscaped areas, lawns (for spot treatment only), in the vicinity of small fruits and fruit trees, around and on buildings, sidewalks, fences, bark mulch, driveways, patios and gravel.  Use on moss and algae, around and on buildings, roofs, decks, sidewalks, fences, bark mulch, driveways, patios and gravel. Finalsan can even be used in cool weather. Areas can be planted five days after treatment.

Finalsan reduces tree toxicity risks and leaves no harmful residue in the soil. It won’t stain bricks, concrete or asphalt and people and pets can re-enter areas once spray dries.

Finalsan & Captain Jack's Deadweed Brew Benefits


  • Great alternatives to conventional herbicides such as glyphosate!
  • Fast acting - visible results within hours!
  • Organic Materials Review Institute (OMRI) listed product (Finalsan only) or "For Organic Gardening".
  • Highly biodegradable, will not affect woody parts of plants - great for spraying at the base of trees or bushes; perfect for vineyards or for hops growers!
  • Dissipates quickly.
  • Does not stain brick, concrete or pavement.
  • No unpleasant odor as with other acid fatty acid products.
  • EPA registered & approved.
  • Quick reentry and no harmful residues.
  • Kill weeds without worrying about children, pets, animals or the environment!

Finalsan & Captain Jack's Deadweed Brew Application Directions

Finalsan Concentrate: 

  • Small Easy to Kill Weeds: Add 1 Part Finalsan / Captain Jack's Deadweed Brew to 9 Parts Water (12.8 Ounces of Finalsan / Captain Jack's Deadweed Brew per Gallon of Water) for a 10% solution.
  • Larger Established Weeds: Add 1 Part Finalsan / Captain Jack's Deadweed Brew to 6 Parts Water (21 Ounces of concentrated product per gallon of water) for a 16.7% solution.
  • Algae and MossAdd 1 Part Finalsan / Captain Jack's Deadweed Brew to 19 Parts Water (6.4 Ounces of concentrated product per gallon of water) for a 5% solution.

Apply 2 Gallons of the diluted solutions per 1,000 square feet.

Captain Jack's Deadweed Brew Concentrate:

  • Small Easy To Kill Weeds:  Use a 3% solution (4 oz. per gallon).
  • Larger Established WeedsUse a 6% solution (8 oz. per gallon).
  • For Tougher to Kill Weeds, Vines, Brush and Sucker Control: Use a 9% solution (12 oz. per gallon).

Apply 2.5 to 7.5 gallons  of the diluted solution per 1,000 square foot (3 to 9 oz. per square yard).


Application Notes for Finalsan & Captain Jack's Deadweed Brew


  • Damage will be visible within an hour to 2 days after spraying.
  • Repeat treatment every 2 to 3 weeks to control new weeds growing from seed and re-growth from bi-annual and perennial weeds.
  • Avoid spraying desirable plants or any over-spray.
  • Products can be applied in cold weather (55°F or above) when other organic weed killers may not work.
  • Can be used around pets and wildlife.

Finalsan & Captain Jack's Deadweed Brew Available Sizes


  • 1 Quart Ready-To-Use, Captain Jack's Deadweed Brew (As Needed).
  • 1 Gallon Ready-To-Use, Captain Jack's Deadweed Brew (As Needed).
  • 1 Pint Concentrate, Captain Jack's Deadweed Brew (Covers 520 to 1,600 sq. ft.).
  • 1 Quart Concentrate, Captain Jack's Deadweed Brew (Covers 1,040 to 3,200 sq. ft.).
  • 2.5 Gallon Concentrate, Finalsan (Covers 18,800 sq. ft.).
  • 250 Gallon Concentrate Tote, Finalsan (Covers 43 acres).

Finalsan & Captain Jack's Deadweed Brew Active Ingredients

Finalsan Concentrate:

  • Ammoniated Soap of Fatty Acids ........ 22%

Captain Jack's Deadweed Brew Ready-To-Use:

  • Caprylic Acid (C8 Fatty Acid) ........... 2.62%
  • Capric Acid (C10 Fatty Acid) ............ 2.17%

Captain Jack's Deadweed Brew Concentrate:

  • Caprylic Acid (C8 Fatty Acid) .......... 44%
  • Capric Acid (C10 Fatty Acid) ........... 36%


    Product Information

    Finalsan:
    Info (Finalsan)
    Label (Finalsan)
    OMRI (Finalsan)

    Captain Jack's Deadweed Brew:
    Label (Captain Jack's RTU)
    Label (Captain Jack's Concentrate)

    Finalsan meets the requirements of the National Organic Program (NOP) for use in organic production.
      Shipping Information

      Unfortunately we do not ship to California addresses

      We offer a 30 day return policy from the date of shipment


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