Lazer Blue - 32 Ounces - Concentrated Spray Pattern Indicator - Perfect Weed/ Fertilizer Marking Dye, Turf Mark and Blue Herbicide Marker

So, I got this to add a mild tint to a borate spray I'm adding to my southern US attick and crawlspace, as a pest/mold preventative measure. It's not a one day task, so the marking dye helps identify already sprayed areas. I originally added way too much to my first gallon. Basically painted the area dark blue, which was okay, since it was in the crawl... I've since started using about 2ml per gallon, and that works fine, even on a fairly dark redish wood. I could probably even cut it down to 1ml per gallon. But meh, I have more than I'll ever need. Anyway, it works great! And it's very easy to clean up. A little tint can linger for the day if I leave a drop for a bit on my skin or in my white sink, but a casual scrub with warm water or a couple soapy washes and it's gone. Which is great, because a drop can cover a huge area!

I recently purchased the Liquid Harvest Laser Blue Concentrated Spray Pattern Indicator (32 oz), and I couldn't be more impressed. The product quality is exceptional—the concentrated formula is clearly manufactured with careful attention to consistency and performance. Mixing and application were quick and effortless. The concentrate dilutes easily to the proper ratio, and the spray solution worked flawlessly right out of the bottle. The bright laser blue color provides excellent contrast against foliage, making spray coverage immediately visible in the field. Performance-wise, this indicator delivers every time. It provides smooth, even color distribution and produces consistent, highly visible marking that helps eliminate gaps and overspray. The dye maintains its visibility throughout the application without fading prematurely, ensuring accurate coverage tracking from start to finish. The overall effectiveness and value exceeded my expectations, especially for the price. The 32-ounce concentrated formula goes a long way, making it an economical choice for both small-scale and large-area applications. I'd highly recommend Liquid Harvest Laser Blue to anyone looking to improve the accuracy and efficiency of their spraying operations—whether you're applying herbicides, pesticides, fertilizers, or other liquid treatments. It's an essential tool for precision agriculture and lawn care professionals.

we all know that these blue dyes are supposed to be concentrated, but this one is super concentrated because I hunted down the Bang for my buck and coverage that I could. Many dies, say that you can see them but often when you mix at the ratios, they say they don’t do quite as well as a job as they said they would this product has not let me down yet and one hint is to use a surfactant so that not only will you die stick better but so will your chemicals that you’re spraying on your plants. Remember surfactants take away the waxy coatings on leaves so that instead of water beading up and running off, It tends to stay on the leaf and allow absorption better I highly recommend you wear gloves with this and I don’t mean cotton. You need to wear a water or chemical resistant glove even when you’re mixing it because one drop of this goes a long way on your skin and as much as I have had Smurf butt from leaking backpack sprayers, I have learned to do everything I can to keep this product and the chemicals that is mixed with away from my clothing and skin. I’ve even gone as far as to wear high waders To keep my occasional tall weeds from getting stuff on me and it also helps to keep any back spray off If you look at the wonderful photo of my hand, you will notice it is slightly stained, and it isn’t. The guy that I worry about is the chemicals that went along with the dye as they are Herbicides. I had a brand new battery powered backpack and as much as I thought it was not going to leak the handle did a really bad job and before I knew it I had a blue hand, so always test your equipment without clean water for leaks because this stuff can be very messy but on the good side, after soaking in the bathtub for an hour and a half and scrubbing the mess out of my hands the dye removed itself or neutral, and all is good in paradise Great and I highly recommend it and my favorite part. Is that only last about half a day and then it disappears unless you get it on vinyl siding that’s old that might take another day. Just read and follow the directions thoroughly because mixing the chemicals are very important. Otherwise you might be wasting your expensive chemicals because you can’t see where you sprayed and overspray is not a good thing either. I hope this helps you and I wish you the best of luck when you’re using this as it is an amazing product when use properly. I highly recommend it and it lasts a long time and usually at least a couple years just sitting around out of the sunlight. I have no idea it freezes or not so I would definitely tell you if you’re going to keep this somewhere up north where it gets super cold in the winter, I would definitely put it in some type of plastic 1 gallon bucket in case he had a freeze in the plastic cracked and that decided to leak out at least it wouldn’t spill over You could use it again when it warms up

This stuff worked well helping keep track of what’s been sprayed. Washed off sidewalk and didn’t stain. Just mind any pets as they will walk wherever you sprayed even if they’ve never ventured to that part of the yard ever.

Very vibrant which makes it easy to see where you have sprayed your poison or fertilizer (which needs to also be in the tank at the same time, some reviewers seem to to understand this). The blue additive is not a poison or fertilizer! This product is great! A bit spendy compared but goes a long way. Also, it will fade over time with and without water if you get it on cement or other surfaces (my sprayer dribbles out of the wand when tank is full).

This makes it so easy to spray the tougher weeds. I use Target 6 to take out the tough Dallas grass and this product marks it just like it should be. I don’t have to worry about overspray areas or anything now that it is marked.

Works well

Works very well.

J'ai testé ce produit sur différentes mauvaises herbes de différentes tailles et .... excepté le fait que ça est donné une couleur bleu au sol ca n'a absolument rien fait !

J'ai suivi les recommandations.Le colorant bleu est bien visible. Les mauvaises herbes sont toujours là et rigolent. PRODUIT INEFFICACE, A FUIR!

Très déçus du produit ça n’as rien fait même après deux passage Produit nil