you apply right a way ,just a thin coat it has a little brush ,I prefer small foam swabs , on just the male rca 40% the length. , all blades of AC ,and IEC
and on all speaker connectors, fuses and tube pins. It’s dark so you can see when covered. ,if you remove ,a cable just reapply. It takes awhile for it to dry
about 300 hours before it is fully settled in .