Bond-Repair Hair Treatments BondiBoost

Cheaper alternative to the K18 Repair Mask

BondiBoost Rapid Repair Bond Builder+ Leave-In Hair Mask

BondiBoost · Model 3.38 fl oz

$33 Maker's list price, checked Sep 29, 2026
Leave-in (no rinse)
Yes
Maker says safe for color-treated hair
Yes
Size
Not listed
Vegan
Yes
Compare with the K18 Repair Mask

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As a cheaper alternative

89% spec match of the K18 Repair Mask

vs the K18 Leave-In Molecular Repair Hair Mask

The closest match on published facts: also a leave-in with the same four-minute wait, color-safe, vegan and cruelty-free, for $33. BondiBoost prints the size only as 3.38 fl oz, so size is left unscored.

$42 less (56%) Ranked #1 of the K18 Repair Mask alternatives

Better

Nothing listed.

Matches

  • Leave-in (no rinse)
  • Maker says safe for color-treated hair
  • Vegan
  • Cruelty-free

Gives up

Nothing listed.

Full specifications

As BondiBoost publishes them. “Not listed” means the maker gives no figure.

Leave-in (no rinse)
Yes
Maker says safe for color-treated hair
Yes
Size
Not listed
Vegan
Yes
Cruelty-free
Yes
Wait time
4 min

Source: bondiboost.com

What matters in bond-repair hair treatments

The first question is whether a treatment stays in or gets rinsed out, because a leave-in and a pre-shampoo treatment fit different routines. After that, compare what makers print about color-treated hair, vegan and cruelty-free status, and bottle size.

All bond-repair hair treatments compared

BondiBoost Leave-In Mask head to head