What is the best heat protectant for flat ironing?

One really good choice is the Beyond the Zone Turn up the Heat protection spray which sells for $7.49
specifics:

• Use with flat irons, curling irons or any heat styling appliance
• Leaves hair soft and manageable
• Provides luxurious shine
• Seals the cuticle for silky smooth looking hair
• Creates slip for effortless heat styling

Beyond The Zone Turn Up The Heat Flat Iron Protection Spray is a spray-in treatment that smooths hair. This humidity-resistant heat styling aid adds a "Heat Defense" barrier that protects the hair from thermal heat. Beyond The Zone Turn Up The Heat Flat Iron Protection Spray helps optimize the effectiveness of flat irons, curling irons, and hair dryers while providing outstanding heat protection, and adding smoothness, shine, and softness to your hair.



Also good is Beyond the Zone Turn up the Heat Serum which sells for $6.99
specifics:

• Lightweight serum
• Protects hair from heat styling damage
• Use with any heated styling appliance
• Leaves hair soft and shiny

Beyond The Zone Turn Up the Heat Serum protects hair from heat damage caused by heat styling tools. Leaves hair soft, shiny, and healthy-looking.



Another is the Silk Elements Megasilk Olive heat protection spray which sells for $6.00
specifics:

• Formulated with Olive Oil and Silk Protein
• Helps protect from heat damage
• Use with flat irons, blow dryers or any heat styling tool
• Provides a luxurious shine

Silk Elements Megasilk Olive Heat Protection Spray is formulated with Olive Oil and Silk Protein, helps protect the hair from damage caused by heated appliances. Leaves hair soft and silky while providing a luxurious shine.