How much Longhairs® #10-B Protein Conditioner do I use?

Enough. If you use not enough shampoo in each dose, or don't wash often as daily with those 4-5 little shampoo applications... you'll find that need more conditioner. Be sure to always scrub conditioners into the scalp before detangling. Provided you've used the shampoo as directed... the approximate #10-B conditioner for very long, 2 tablespoons, (#9-Trees version use 3 tbsp) as directed and it should melt in right away, 'if' you shampooed right according to our direction.