K18 Biomimetic Hairscience HeatBounce Conditioning Heat Protectant

Protect hair from heat up to 450°F (232°C) with K18 HeatBounce Conditioning Heat Protectant. This lightweight leave-in formula detangles, conditions, and helps reduce breakage. 

K18 Biomimetic Hairscience HeatBounce Conditioning Heat Protectant 118ml

Protect your hair from everyday heat styling while keeping it soft, smooth, and healthy-looking with the K18 Biomimetic Hairscience HeatBounce Conditioning Heat Protectant. This advanced leave-in conditioning spray is powered by patented ResiliCore™ heat-shielding technology, delivering deeper heat protection than traditional heat protectants by helping shield hair from the cuticle to the cortex—the areas where heat damage occurs most.

Designed for anyone who regularly blow-dries, straightens, curls, or diffuses their hair, HeatBounce protects against temperatures up to 450°F (232°C) while conditioning, detangling, and improving manageability in one lightweight formula. Unlike many heat protectants that can leave hair sticky or weighed down, HeatBounce provides weightless moisture and softness while helping reduce breakage caused by repeated heat styling.

Inspired by naturally resilient proteins that withstand extreme temperatures, the innovative ResiliCore™ technology helps reinforce the hair’s internal structure during heat exposure, leaving hair stronger, shinier, smoother, and easier to style. Whether you’re creating sleek straight styles, bouncy blowouts, defined curls, or textured waves, HeatBounce helps maintain healthier-looking hair without sacrificing styling performance. 

 

Key Benefits

• Protects hair from heat up to 450°F (232°C).
• Helps reduce hair breakage by up to 85% after blow drying.*
• Patented ResiliCore™ technology provides deeper heat protection.
• Conditions, softens, and detangles hair in one simple step.
• Helps defend hair from repeated heat styling damage.
• Leaves hair smoother, shinier, and easier to manage.
• Lightweight leave-in formula won’t weigh hair down.
• Helps improve softness without leaving residue.
• Suitable for blow dryers, flat irons, curling irons, diffusers, and hot brushes.
• Can be used on damp or dry hair.
• Safe for all hair types, textures, color-treated hair, chemically processed hair, and extensions.

 

 

Key Technologies & Ingredients

Patented ResiliCore™ Technology – Inspired by proteins found in nature that tolerate extreme temperatures, this technology penetrates deeper into the hair to help protect against heat damage from within.

Conditioning Blend – Softens, smooths, and detangles hair while improving manageability before styling.

Lightweight Leave-In Formula – Provides conditioning and heat protection without heaviness, buildup, or greasy residue.

 

How to Use

• Start with clean, towel-dried hair before blow drying, or apply to dry hair before using hot tools.
• Section the hair for even distribution.
• Spray or apply a small amount throughout the mid-lengths and ends.
• Brush or comb through to distribute evenly.
• Begin with a small amount and build if needed—hair should feel soft and conditioned, not coated.
• Style as desired using your favorite heat tools.
• Reapply before each heat styling session for continued protection. 

 

Suitable For

• All hair types
• Fine hair
• Thick hair
• Straight hair
• Wavy hair
• Curly hair
• Coily hair
• Color-treated hair
• Bleached hair
• Chemically processed hair
• Hair extensions
• Frequent heat styling

 

Texture & Finish

• Lightweight leave-in spray
• Conditioning formula
• Non-greasy
• Non-sticky
• Weightless feel
• Soft, smooth finish
• Natural shine
• Improved manageability

 

Available Size

118ml / 4 fl oz

 

Why You’ll Love It

Most heat protectants simply coat the outside of the hair. K18 HeatBounce is designed to provide deeper protection with patented ResiliCore™ technology while simultaneously conditioning and detangling hair. The lightweight formula shields against high temperatures up to 450°F (232°C), helping reduce breakage without sacrificing movement or volume. Whether you’re creating a sleek silk press, a voluminous blowout, defined curls, or everyday styles, HeatBounce leaves hair feeling healthier, softer, and more resilient after every styling session. 

 

Frequently Asked Questions

How much heat does K18 HeatBounce protect against?

It provides heat protection up to 450°F (232°C), making it suitable for blow dryers, flat irons, curling irons, and other heat styling tools. 

Can I use it on dry hair?

Yes. HeatBounce can be applied to towel-dried hair before blow drying or to dry hair before using hot styling tools. 

Will it weigh my hair down?

No. The lightweight formula conditions and detangles without leaving hair greasy, sticky, or heavy. 

Is it suitable for all hair types?

Yes. It is designed for all hair textures and types, including fine, thick, curly, coily, color-treated, chemically processed hair, and extensions. 

Can I use it every time I heat style my hair?

Yes. K18 recommends applying HeatBounce before every heat styling session to help maintain protection against heat damage. 

Product Specifications

Brand: K18 Biomimetic Hairscience

Collection: HeatBounce™

Product Type: Leave-In Conditioning Heat Protectant

Hair Concern: Heat Damage, Breakage, Dryness, Tangles

Hair Type: All Hair Types & Textures

Technology: Patented ResiliCore™ Heat-Shielding Technology

Heat Protection: Up to 450°F (232°C)

Benefits: Heat Protection, Conditioning, Detangling, Softening

Texture: Lightweight Leave-In Spray

Finish: Soft, Smooth & Shiny

Suitable For: Wet & Dry Hair

Size: 118ml / 4 fl oz