Use in the same way as an embossing powder, but give it a little longer with the heat, once all molten, immediately place the foil on, colour side up, give it a rub (careful as it can be hot) to adhere it and then leave it to cool, once completely cool peel off.
Alternatively you can use it with a laminator, melt the Bonding Powder first, lay the foil on colour side up and run through a laminator.