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Reactor Red Dye Spray Indicator | Herbicide & Fertiliser Marker Dye
Reactor Red Dye Spray Indicator | Herbicide & Fertiliser Marker Dye
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Never Miss a Spot Again — Spray Smarter with Reactor Red Dye
Reactor Red Dye Spray Indicator is the professional's secret to precise, efficient lawn and turf spraying. Whether you're tackling weeds with a herbicide, applying a liquid fertiliser, or treating a pest problem, this bright red marker dye gives you an instant, visible record of exactly where your spray has landed — so you never double-dose an area or leave gaps untreated.
Simply add Reactor to your spray tank and the solution turns a vivid red, giving you clear, real-time feedback as you work across your lawn or garden. The colour naturally fades over time with sunlight and irrigation, leaving no lasting residue on your turf.
Used by lawn care professionals and home enthusiasts across Australia, Reactor takes the guesswork out of every application.
Why Use a Spray Indicator Dye?
Without a spray marker, it's nearly impossible to track where you've sprayed — especially when spot treating weeds, applying clear liquid fertilisers, or covering large areas. This leads to:
- Missed patches — weeds and pests survive in untreated zones
- Overlapping coverage — costly double-application of chemicals
- Lawn damage — from concentrated over-application in one spot
- Wasted product and money
Reactor eliminates all of these problems with one easy addition to your spray tank.
Key Features
- Vivid red colour for instant, clear visibility of sprayed areas
- Compatible with herbicides, fungicides, insecticides and liquid fertilisers
- Suitable for backpack sprayers, handheld sprayers, and boom sprayers
- Fades naturally over time — no permanent staining of turf
- Active ingredient: Rhodamine B (150g/L) — a trusted, widely used spray dye
- Reduces product waste and improves application accuracy
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Ideal for residential lawns and large-scale turf management
Application Rate
Mix 5–10ml per 10L of spray solution. Adjust the rate depending on desired colour intensity and visibility requirements.
Compatible With
Reactor Red Dye works alongside most water-based lawn care products including:
- Selective and non-selective herbicides
- Liquid lawn fertilisers and soil amendments
- Insecticides and fungicides
Always check individual product labels before mixing to ensure compatibility.
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Frequently Asked Questions
What is Reactor Red Dye Spray Indicator used for?
Reactor Red Dye Spray Indicator is a non-toxic spray marker used to visibly highlight where herbicides, pesticides, or fertilisers have been applied. It helps prevent missed areas, overlap, and over-application during lawn and turf treatments.
How does Reactor Red Dye Spray Indicator work?
The dye temporarily colours the spray solution bright red so applicators can clearly see treated areas. Once dry, the colour fades over time due to sunlight, irrigation, and natural breakdown.
Why should I use a spray dye indicator in lawn care?
Using a spray dye improves accuracy and efficiency by ensuring even coverage. It reduces product waste, prevents double spraying, and helps avoid damage caused by uneven chemical application.
Is Reactor Red Dye safe for lawns and turf?
Yes, Reactor Red Dye is designed to be turf-safe when used at recommended rates. It does not harm grass or affect the performance of compatible lawn care products.
Can Reactor Red Dye be used with herbicides and insecticides?
Yes, it is commonly mixed with herbicides, insecticides, fungicides, and liquid fertilisers. It is compatible with most water-based lawn care products, but always check product labels before mixing.
Can Reactor Red Dye be used in a backpack sprayer?
Yes, it is ideal for use in backpack sprayers, boom sprayers, and handheld sprayers. It helps improve accuracy during both small residential and large commercial applications.
Helpful in all spraying applications especially spot spraying minimising waste and improving complete cover.
Using a spray indicator dye is a game changer.. Accurate spot spraying is a breeze. Cover more area without unnecessary reapplication. Win win unless your a weed..
Great product to see where weeds or ants have been sprayed.