--- 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: "£78.22" currency: GBP in_stock: true reviews_count: 8 category: "Liquid Harvest" url: https://www.desertcart.co.uk/products/40841792-liquid-harvest-lazer-blue-concentrated-spray-pattern-indicator-1-gallon store_origin: GB region: United Kingdom --- # Compatible with water-based herbicides & fertilizers 1 Gallon concentrated liquid Vivid blue spray pattern indicator 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:** £78.22 **Availability:** ✅ In Stock ## Summary > 🔵 See Every Spray, Save Every Dollar! ## 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?** £78.22 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/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 - • **Water-Based Formula:** Mixes seamlessly only with water-based solutions for optimal performance. - • **Cost-Effective Lawn Care:** Prevents wasteful overspray, saving money and protecting your turf. - • **Precision Spray Visibility:** Easily see where treatments hit to avoid costly over-application. - • **Broad Spectrum Compatibility:** Works with herbicides, fungicides, pesticides, and fertilizers for versatile use. - • **Non-Permanent & Non-Staining:** Leaves no lasting marks, keeping your lawn pristine post-application. ## Overview Liquid Harvest Lazer Blue is a 1-gallon concentrated spray pattern indicator designed for professional lawn care. It mixes exclusively with water-based herbicides, fungicides, pesticides, and fertilizers to provide a vivid blue mark that clearly shows treated areas. Non-permanent and non-staining, it helps prevent over-application, ensuring precise, cost-effective, and environmentally conscious lawn maintenance. ## Description Product description How much do I use? 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. How much do I use? 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. Is this product soluble in water? Yes, this product should be used with other water based products. Is this product soluble in water? Yes, this product should be used with other water based products. Does this product come with measuring device? 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. Does this product come with measuring device? 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. Does this product stain? 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. Does this product stain? 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. How do I get this product off of my hands? 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. How do I get this product off of my hands? 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. Lazer Blue is extremely concentrated, you must be careful when handling, mixing & storing this product. Lazer Blue provides a visual indication of the spray coverage, ensuring that the right amount of product required for your intended target. Lazer Blue can be used with a variety of other water-based products to help optimize your application and reduce waste. Lazer Blue is not permanent and will not stain once diluted per label instructions. The colorant will fade in time with sunlight & moisture. Save Time and Money Know where you are going and where you have been Concentrated Spray Marker Use 1/2 ounce of Lazer to every gallon of spray marker Soluble in Water Just add Lazer to mixture and spray to see coverage Liquid Harvest Lazer Blue Spray Marker 1/2 oz per Gallon of Mixture Eliminate Overspray Visibly See Where You Have Sprayed Non Permanent When Diluted hero-video Review: Commercial quality saves weed killer - Great commercial quality dye. Saves a lot of weed spray on one acre lot Review: Works - Great product ## 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 | #13,252 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #483 in Garden Fertilizers | | Brand | Liquid Harvest | | Brand Name | Liquid Harvest | | Coverage | non-selective broad spectrum coverage | | Customer Reviews | 4.7 out of 5 stars 1,136 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 | 128.0 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) ![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 2](https://m.media-amazon.com/images/I/81yF+7GGq5L.jpg) ![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 3](https://m.media-amazon.com/images/I/81RzKpPCueL.jpg) ![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 4](https://m.media-amazon.com/images/I/81iIWUHP9TL.jpg) ![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 5](https://m.media-amazon.com/images/I/91TWSevONbL.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 ### ⭐⭐⭐⭐⭐ Commercial quality saves weed killer *by A***Y on May 10, 2026* Great commercial quality dye. Saves a lot of weed spray on one acre lot ### ⭐⭐⭐⭐⭐ Works *by A***D on April 27, 2026* Great product ### ⭐⭐⭐⭐⭐ Helpful!!! *by "***" on July 6, 2025* Great product. Great Buy. It doesn't require much to get er done. It looks more green when applied and leaves an even color across your lawn. It also helps with the unnecessary over spraying of your weed killer product, which saves money. --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.uk/products/40841792-liquid-harvest-lazer-blue-concentrated-spray-pattern-indicator-1-gallon](https://www.desertcart.co.uk/products/40841792-liquid-harvest-lazer-blue-concentrated-spray-pattern-indicator-1-gallon) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-05-25*