Spray indicator allows you to see where you have sprayed. No more areas missed or applying to the same area twice.
See where you have sprayed our moss and weed killers with a temporary blue dye additive. All you need to do is add this marker to your spraying solution and spray as normal. It will leave a faint blue stain on the surface to show you where you have sprayed. DON'T WORRY, the stain is only faint and it fades over a very short period of time so you will not be left with a blue patio or lawn.
Adding this to your solution will save you from spraying over the same area more than once or missing areas completely.
This is a 1 litre container. As the rate is 1 to 2.5ml per litre then it can be used in up to 1000 litres of solution.