---
product_id: 40841792
title: "Liquid Harvest Lazer Blue Concentrated Spray Pattern Indicator - 1 Gallon (128 Ounces) - Perfect Weed Spray Dye, Herbicide Dye, Fertilizer Marking Dye, Turf Mark and Blue Herbicide Marker"
brand: "liquid harvest"
price: "€ 190.50"
currency: EUR
in_stock: true
reviews_count: 8
category: "Liquid Harvest"
url: https://www.desertcart.be/products/40841792-liquid-harvest-lazer-blue-concentrated-spray-pattern-indicator-1-gallon
store_origin: BE
region: Belgium
---

# Non-permanent, fades in 3-4 days Water-based mix only Vivid blue spray visibility Liquid Harvest Lazer Blue Concentrated Spray Pattern Indicator - 1 Gallon (128 Ounces) - Perfect Weed Spray Dye, Herbicide Dye, Fertilizer Marking Dye, Turf Mark and Blue Herbicide Marker

**Brand:** liquid harvest
**Price:** € 190.50
**Availability:** ✅ In Stock

## Summary

> 🔵 Track Every Drop, Save Every Lawn!

## Quick Answers

- **What is this?** Liquid Harvest Lazer Blue Concentrated Spray Pattern Indicator - 1 Gallon (128 Ounces) - Perfect Weed Spray Dye, Herbicide Dye, Fertilizer Marking Dye, Turf Mark and Blue Herbicide Marker by liquid harvest
- **How much does it cost?** € 190.50 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.be](https://www.desertcart.be/products/40841792-liquid-harvest-lazer-blue-concentrated-spray-pattern-indicator-1-gallon)

## Best For

- liquid harvest enthusiasts

## Why This Product

- Trusted liquid harvest brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Bulk Value Pack:** One gallon (128 oz) ensures long-lasting use and unbeatable cost efficiency.
- • **User-Safe Handling:** Designed for easy cleanup—won't stain spray tanks and washes out of clothing.
- • **Universal Compatibility:** Seamlessly mixes with herbicides, fungicides, pesticides, and fertilizers.
- • **Eco-Friendly & Temporary:** Non-staining formula that naturally fades, protecting your turf and equipment.
- • **Precision Spray Tracking:** Avoid costly over-application with clear, visible blue marking.

## Overview

Liquid Harvest Lazer Blue is a 1-gallon concentrated spray pattern indicator designed exclusively for water-based solutions. It provides vivid blue visibility to mark treated areas precisely, preventing over-application of herbicides, pesticides, and fertilizers. The non-permanent, non-staining formula lasts 3-4 days on turf and washes out easily, making it an essential tool for professional lawn care and garden management.

## Description

desertcart.com: Liquid Harvest Lazer Blue Concentrated Spray Pattern Indicator - 1 Gallon (128 Ounces) - Perfect Weed Spray Dye, Herbicide Dye, Fertilizer Marking Dye, Turf Mark and Blue Herbicide Marker : Arts, Crafts & Sewing

Review: Good product helped me to avoid over spraying areas of my yard when applying weed killer - Works great when I spot spray marking the areas so I don’t accidentally spray them again. A little goes along way. This stuff can get messy so definitely wear nitrile or vinyl gloves when handling. I had a couple drops hit my red thin hoody but it washed out easily. Stayed on my lawn for 3 to 4 days after applying but then completely went away. Will not stain your spray tank. Easily washes out.
Review: gallon size much cheaper per ounce - Buy the gallon size and the price is much better, will last a long long time. Works great!!

## Features

- Mixes only with water based solutions, will not work with oil based
- Easily marks grass and lawns
- Mix with herbicides, fungicides, pesticides, & fertilizers
- Indicates where spray mixtures have been applied
- Non-permanent and nonstaining

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0049I9OBA |
| Active Ingredients | FD&C Blue 1 |
| Best Sellers Rank | #11,401 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #428 in Garden Fertilizers |
| Brand | Liquid Harvest |
| Brand Name | Liquid Harvest |
| Coverage | non-selective broad spectrum coverage |
| Customer Reviews | 4.6 out of 5 stars 1,153 Reviews |
| Included Components | Utility Knife |
| Item Form | Liquid |
| Item Type Name | Utility Knife |
| Item Weight | 8 pounds |
| Liquid Volume | 1 gallons |
| Manufacturer | Sanco Industries |
| Model Number | 118 |
| Part Number | 118 |
| UPC | 768980001188 |
| Unit Count | 128 Ounce |
| Warranty Description | Warranty |

## Product Details

- **Active Ingredients:** FD&C Blue 1
- **Brand:** Liquid Harvest
- **Item Form:** Liquid
- **Item Weight:** 8 Pounds
- **Liquid Volume:** 1 Gallons

## Images

![Liquid Harvest Lazer Blue Concentrated Spray Pattern Indicator - 1 Gallon (128 Ounces) - Perfect Weed Spray Dye, Herbicide Dye, Fertilizer Marking Dye, Turf Mark and Blue Herbicide Marker - Image 1](https://m.media-amazon.com/images/I/61zubmTU+eL.jpg)

## Available Options

This product comes in different **Size** options.

## Questions & Answers

**Q: How much do I use?**
A: Start with 1/2 ounce per gallon of mixture. If darker color is desired, add small amounts (up to 1oz per gallon) until desired color is achieved is spray.

**Q: Is this product soluble in water?**
A: Yes, this product should be used with other water based products.

**Q: Does this product come with measuring device?**
A: Our updated packaging for the 8 & 16 ounce bottles have a built in measuring device. Other bottles & sizes will need a dedicated syringe/measuring device from home. For sustainability efforts, we are selling through current packaging to reduce waste.

**Q: Does this product stain?**
A: This product is very concentrated and undiluted product will stain. Lazer is not permanent and will not stain once diluted. The colorant will fade in time with sun and moisture.

**Q: How do I get this product off of my hands?**
A: This product is very concentrated and can stain hands, clothing, cement, and other objects the concentrate comes in contact with. Over time the color will fade from hands or you can use a 50/50 bleach water mix to fade color more quickly.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good product helped me to avoid over spraying areas of my yard when applying weed killer
*by E***S on June 24, 2026*

Works great when I spot spray marking the areas so I don’t accidentally spray them again. A little goes along way. This stuff can get messy so definitely wear nitrile or vinyl gloves when handling. I had a couple drops hit my red thin hoody but it washed out easily. Stayed on my lawn for 3 to 4 days after applying but then completely went away. Will not stain your spray tank. Easily washes out.

### ⭐⭐⭐⭐⭐ gallon size much cheaper per ounce
*by B***N on June 9, 2026*

Buy the gallon size and the price is much better, will last a long long time. Works great!!

### ⭐⭐⭐⭐⭐ Blue marker dye.
*by S***L on June 7, 2026*

Works great. Blue Really stands out so you won't miss any weeds.

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**Shop now:** [https://www.desertcart.be/products/40841792-liquid-harvest-lazer-blue-concentrated-spray-pattern-indicator-1-gallon](https://www.desertcart.be/products/40841792-liquid-harvest-lazer-blue-concentrated-spray-pattern-indicator-1-gallon)

---

*Product available on Desertcart Belgium*
*Store origin: BE*
*Last updated: 2026-08-11*