I think it is just supposed to slow it down but imo there isn't the right chemicals in it for that.
Here is a FAQ I found on their site
GOLD RANGE REVERSE FAQs
Q: Do I need to dilute Gold Range REVERSE with water?
A: No. Gold Range REVERSE is ready to use out of the bottle. The only thing you need to add is Gold Range SATURATOR at 10 ml / 2 teaspoons per 1 litre / 1 quart. Then spray immediately on your leaves.
Q: Will Gold Range REVERSE turn a male plant into a female plant?
A: No. Gold Range REVERSE will NOT turn a male plant into a female plant.
Q: What does Gold Range REVERSE do?
A: Gold Range REVERSE was designed to provide the optimal specialized nutrition that is required to help a plant to express and maintain its natural genetic disposition.
Q: Do I need to spray Gold Range REVERSE with the lights off?
A: No. When mixed with Gold Range SATURATOR, as recommended on the label and on our website
Usage Instructions, you can spray with the lights on if it is more suitable to your needs. However, if you need to spray in the dark, then this can also be performed with equally good results.
Q: Do I have to use Gold Range SATURATOR with Gold Range REVERSE; will it work just as good without it?
A: Yes. You should always use Gold Range SATURATOR with every foliar product you spray on your plants, be it a Dutch Master product, or not. The reason for this is that Gold Range SATURATOR was designed to deliver your foliar payload deep within the leaf tissue, explosively releasing it to where it is needed most – the engine room! Foliar products will not work as effectively without Gold Range SATURATOR and that is a fact!
Q: Can I use Gold Range REVERSE in the grow period?
A: No. Gold Range REVERSE has been designed to only be used in the flower / bloom stage.
Q: Should I use Gold Range REVERSE on every crop as a maintenance spray to avoid problems or only when and if I see a problem occurring?
A: Gold Range REVERSE should be used on every crop to maintain optimal expression.
Q: How should I use Gold Range REVERSE as a maintenance program?
A: As a preventative aid, spray the first time at the onset or initiation of flowering (usually approx 7 days into flower) and once again 10 days after your first spray.
Q: What if a problem suddenly pops up and I have not been using Gold Range REVERSE as a maintenance?
A: Gold Range REVERSE can be used at the first sight of a problem by spraying immediately and once again 10 days later if the problem still persists.
Q: How long can I keep a mixed bottle of Gold Range REVERSE and SATURATOR for before using it?
A: You should only ever mix up enough Gold Range REVERSE and SATURATOR for the immediate spraying and it should be sprayed on your plants within 10 - 15 minutes of mixing together. This is critical for optimal effectiveness.
Q: How much should I mix up?
A: Only mix enough to spray an even mist on the tops of your leaves.
Q: Should I spray the top and bottom of the leaves?
A: No. It is only necessary to spray the tops of your leaves because Gold Range SATURATOR will effectively deliver everything in to the leaf tissue from the top.
Q: How long can Gold Range REVERSE be stored for?
A: If stored uncontaminated in a cool dark environment, Gold Range REVERSE can be stored indefinitely, however, for optimal results it is best to discard older product and use fresh.