Description
Specialist Red Rhodamine B Spray Marker Dye
Specialist Red Spray Marker Dye is an APVMA-registered spray indicator containing 150 g/L Rhodamine B, formulated to mark treated areas during herbicide and pesticide spray applications in Australian agricultural and horticultural operations. Registered and manufactured by Specialist Sales Pty Ltd, it works with both liquid and powder herbicide products, delivering a clear red colouration in the spray solution so operators can track exactly where the product lands. As a result, it reduces the risk of missed areas and prevents costly double-application across broadacre, pasture, and row crop programs.
Furthermore, Specialist Red Spray Marker Dye converts white foam to a distinct pink colour when used with foam marker systems, making it a practical dual-purpose spray indicator. Its water-soluble Rhodamine B formula mixes readily in standard spray tanks and suits a wide range of tank-mix programs. Notably, the product is not to be used for any purpose other than that indicated on the label, unless authorised under appropriate legislation.
Frequently Asked Questions
Q. What does Specialist Red Spray Marker Dye do?
A. It adds clear red colouration to spray solutions so operators can identify treated areas in real time. This tracking reduces missed zones and prevents double-application waste across paddock spray programs.
Q. What is the active constituent in Specialist Red Spray Marker Dye?
A. The active constituent is 150 g/L Rhodamine B. This is the same constituent statement as shown on the APVMA-approved label (Approval No. 80263/100496).
Q. What is the correct application rate for spray marking?
A. Apply at 5-10 mL per 10 litres of spray solution, or 50-100 mL per 100 litres. Use the higher rate when more intense colour marking is required.
Q. Can Specialist Red be used with foam marker systems?
A. Yes. Apply at 20-30 mL per 10 litres of diluted foam mixture. This converts white foam to a distinct pink colour for easier area identification in specific field situations.
Q. Is Specialist Red compatible with amine-based herbicides such as 2,4-D Amine 500 and MCPA 500?
A. Yes, with a specific mixing sequence. Mix the Red Spray Marker Dye thoroughly with water before adding the herbicide. Then slowly add the herbicide whilst the spray is being agitated. Clean the tank and equipment thoroughly after each use.



Brett (verified owner)
Excellent product, quick delivery
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Mark (verified owner)
I like being able to see what I’ve sprayed and find this essential for sanity as much as being practical but I needed to use a good 200mL per 100L which is over double the 50 to 100 on the label. Acknowledged that the disclaimer says increase as required but it makes it quite expensive. Have not tried other brands. Used in St Johns Wort mix so you’d think it wouldn’t be hard to turn a yellow flower red but as I said it needed much more.
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Paul Griggs (verified owner)
Its the best one i have used. Good price Works perfect and fast delivery
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Peter Boyd (verified owner)
Purchased two litres. Quality product delivered to Brisbane overnight. Helpful who know their stuff.
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GG (verified owner)
I should have used this product earlier. It is great and saves me time and chemicals. Really good company to deal with. A wealth of information.
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Richard Dobie (verified owner)
This is the second time I have bought a 20 litre drum of Specialist Red Spray Marker Dye. The dye is excellent quality at a good price and the staff are ultra helpful.
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