Final answer:
Heat protectant spray is used to prepare and protect the hair during a pressing service to prevent scorching and breakage.
Step-by-step explanation:
The product used to prepare and protect the hair during a pressing service to help prevent scorching and breakage of the hair is heat protectant spray. Heat protectant sprays are specifically designed to provide a barrier between the hair and the heat styling tools, reducing the risk of damage from high temperatures. They help prevent scorching and breakage by absorbing and distributing the heat evenly.