Monterey Mark-It Blue

3.5 out of 5 stars 25 Reviews | 7 Q&A

Monterey Mark-It Blue
Bundle & Save! Get your bottle of Mark-It Blue 8 oz. with your qualifying purchase* for only $5! Use Code BLUE5 at Checkout.
Price/Ea.
$14.98

Buy 2 or more: $14.49 each

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Average Rating

3.5 out of 5 stars Rating: 3.4

25 Reviews | 7 Q&A

Product Overview

Spray solution blue colorant that indicates where you have applied a chemical spray. Works great with Roundup or Remuda and other herbicides as well as fertilizers and insecticides. Avoid skips and overlapping. Washes off without staining, is non-toxic and dissipates with sunlight.

*Must add the Monterey Mark-It Blue 8 oz, at least one qualifying product, and enter coupon code BLUE5 to the cart to receive the discounted price. While supplies last. Subject to our coupon terms and conditions, brands and products that are excluded from this promotion are: Altus, Avelyo, Barricor SP, Bayer Kontos, Celsius WG, FreeHand, Orkestra Intrinsic, Pageant Intrinsic, Pylex, Pylon, Revolver, Savate, Sultan, Tower, Tribute Total, TruDetx, Ventigra. See Details.

Features and Specs

Active Ingredient Triphenylmethane blue dye, aqueous solution
For use in Outdoors to indicate where you have sprayed chemical sprays
Application 1 oz. per gallon of water
Pet safe Yes, if used as directed on label - Safe once dried
Shipping Weight 0.58 lbs
Manufacturer Monterey Lawn & Garden (Mfg. Number: LG 1130)
UPC 022179101395
Review Search   
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  • 5 of 5 Stars

    Mark-It Blue

    By Kurt on 05/27/2013

    Easy to use. Just visible enough to keep from overlapping or missing spots but not too bright. Seems to fade quickly from concrete. I used 1oz per gallon with great results.

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    19 of 19 people found this review helpful

  • 5 of 5 Stars

    one way

    By Chuck on 02/23/2015

    been using mark-it blue for about 5-6 years I have 5 acres with a lot of tumble weeds I ad added mark-it blue. Due to the cost of weed killer I started using mark-it blue it saves a lot of $$$ because I do not duplicate spraying the same weeds multiple times.

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    17 of 17 people found this review helpful

  • 4 of 5 Stars

    Helpful

    By Patti on 09/10/2016

    Helpful with herbicide application but hard to see on dark green foliage unless recommended amt is doubled. Even at 2x strength I will get alot of applications from one bottle. Accidentally knelt in full-strength blue dye; worried i would be 'tattoed' for a long time but several hours later nearly all showered off with only a little effort using soapy washcloth.

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    15 of 15 people found this review helpful

  • 1 of 5 Stars

    Only marks dead grass areas

    By Don on 12/03/2015

    This product did not show up on my regular grass, it only showed on dead grass. Ok to use it if you are spraying dead areas but useless on live, green lawns and vegetation.

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    14 of 17 people found this review helpful

  • 3 of 5 Stars

    Mark it blue

    By Lonnie on 06/26/2017

    Product seems to be satisfactory. Packaging is pretty weak and thin. Dropped a jug and it split open and went everywhere. Quite a mess and expense due to lost product. Not sure if I'd use this again or not.

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    4 of 8 people found this review helpful

See all 25 customer reviews

Questions & Answers

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Sort Questions
Q
How long does the Monterey Mark-It-Blue stay visible? Can it be used on a home lawn?
A

According to the manufacturer, the Monterey Mark-It-Blue will break down in direct sunlight and will dissipate in 2-3 hours. The Mark-It-Blue may also be used on your home lawn. 

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13 of 13 people found this answer helpful

Q
Can Monterey Mark-It Blue be used on vegetables and other crop areas?
A

Yes, Monterey Mark-It Blue is a non-toxic, food-grade pigment and washes off without staining. 

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3 of 3 people found this answer helpful

Q
Is this product safe for aquatic use?
A
Most colorants do not have any toxicity to aquatic life or any area you are treating. The Mark It Blue does not state specifically whether you can use in in an aquatic area. You can contact the manufacturer to see if it will meet your needs. Monterey Lawn:1-559-499-2100


If you are trying to change the color of your pond/lake you may want to look towards Crystal Blue Black Out or Crystal Blue Pond Colorant.

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2 of 3 people found this answer helpful

Q
Can I use Monterey Mark-It Blue with Boracare on wood trim?
A

Yes, Monterey Mark-It Blue can be used when treating with Bora-Care for a termite treatment. Just be aware that the dye will also most likely soak into the wood as well. 

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2 of 3 people found this answer helpful

Q
Can Monterey Mark-It Blue be used with a surfactant or is it a surfactant?
A

Monterey Mark-It Blue is a spray solution blue colorant that indicates where you have applied a chemical spray. It works great with herbicides, fertilizers, and insecticides. It washes off without staining, and it is non-toxic and dissipates with sunlight.

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2 of 15 people found this answer helpful

See all 7 customer questions

Monterey Mark-It Blue 3.5 out of 5 stars Rating: 3.4 (25 Reviews / 7 Q&A)

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