There are different sprays that can be used for wound dressing shortly after the cut has been made.
This is to prevent Eutypa, harmful pathogens and fungal infections from entering the vine through the open wound and will work as a shield to protect against them.
The kind of spray used on the vine is down to the decision of the grower, although we highly recommend and nearly always use Vinevax, an effective and natural fungus Trichoderma, formulated to support colonisation of fresh grafting and pruning wounds which has been proven to protect your vines, even after 12 months.
The alternative to spraying the vines open wounds, is to paint them. This is usually a cheaper option then spraying them, although it is generally less effective.
We can recommend some wound paint or like the spray, the grower can decide on the brand of paint that they would like to use.