Beyond repair and washing, K18 makes four products for the rest of the routine: heat protection, volume, second-day refresh and scalp care. Each one carries the brand’s repair approach into a styling or scalp product. Here is what each does, how to use it, and how it fits around the leave-in mask. Figures are K18’s own claims.
HeatBounce Leave-In Conditioning Heat Protectant
A leave-in conditioner and heat protectant in one, rated to 450°F (232°C). Its resilicore™ heat-shielding technology, inspired by heat-resistant proteins in nature, is designed to reach the cortex where heat damage happens. K18 reports 85% less breakage after blow-drying, and the conditioning blend detangles and softens. Suitable for all hair types and extensions. How to use: apply through sectioned, towel-dried hair before blow-drying, or on dry hair before hot tools; brush through; build slowly so hair feels soft, not coated. Sizes: deluxe sample $7.15, 47 ml $24.65, 118 ml $49.29, 237 ml $82.15. Shop HeatBounce.
AstroLift Reparative Volume Spray
A lightweight, non-sticky volume spray for fine, flat hair. A fibre-thickening blend that K18 says increases hair diameter by up to 25% works with the peptide, for 2.5 times more volume lasting up to 2 days. It is humidity-resistant and works whether you blow-dry or air-dry. How to use: shake, spray generously 4 to 6 inches from roots and lengths on towel-dried or dry hair, then blow-dry or air-dry; reapply between washes. Sizes: 15 ml $7.15, 47 ml $22.50, 118 ml $47.15. Shop AstroLift.
AirWash Non-Aerosol Dry Shampoo
A non-aerosol dry shampoo with translucent, porous microbeads that absorb oil and sweat without starchy buildup or a white cast, plus odorBIND™ to trap odour. Mediterranean microalgae help balance the scalp. How to use: shake 5 seconds, hold 4 to 6 inches from the scalp (closer for coily textures), one spray per section, massage in, brush. Sizes: 1.6 oz $24.65, 4 oz $49.29. Shop AirWash.
FutureIQ Nightly Biomimetic Scalp Serum
A lightweight nightly serum for the first signs of hair ageing: shedding, thinning density and early greys. It uses K18’s MultiVital™ technology: biomimetic peptides, a root-anchoring complex and antioxidants. In K18’s 12-week clinical study, users saw up to 19,000 more hairs, 87% showed increased density and 70% showed fewer greys. How to use: nightly, 4 droppers to a damp or dry scalp (middle part, each side part, hairline), massage in, do not rinse. One 90 ml bottle ($122.86) lasts a month; give it 12 weeks. It is a cosmetic, not a medical treatment: see a doctor about sudden or patchy hair loss. Shop FutureIQ.
Where they fit in a wash day
- Shampoo (Damage Shield, or Peptide Prep Detox weekly).
- Leave-In Molecular Repair Mask, 4 minutes, on mask days.
- Weightless Hair Oil if you fight frizz.
- HeatBounce before heat, AstroLift for volume.
- AirWash on day two or three. FutureIQ every night.
Quick decision guide
- You blow-dry or iron → HeatBounce
- Your hair is fine and flat → AstroLift
- Your roots get oily between washes → AirWash
- You see more hair in the brush or your first greys → FutureIQ
See the full range on the K18 collection page or start with the K18 buying guide.