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Pros & Cons

Restores elasticity to brittle hair

Pre-shampoo method is highly effective

Legendary formula with decades of results

Excellent for fine, color-treated hair

Expensive for the size

Pre-shampoo method requires extra time

Not suitable for very thick hair

Best For

Fine, color-treated, or elasticity-damaged hair

Philip Kingsley

Philip Kingsley Elasticizer

Name: Philip Kingsley Elasticizer
Brand: Philip Kingsley

By Jamie Lin, Reviews Editor|Last updated April 25, 2026|How we test

Pre-shampoo treatment with castor oil and hydrolyzed elastin for elasticity and shine.

Philip Kingsley Elasticizer is a legendary pre-shampoo treatment that has been a cult favorite since the 1970s - and for good reason. The formula, originally created for Audrey Hepburn, uses castor oil and hydrolyzed elastin to restore elasticity and shine to dry, brittle hair.

We tested this on fine, color-treated hair that had lost elasticity from over-processing. The results were remarkable: after just two treatments, hair was noticeably more elastic (it stretched without breaking), shinier, and easier to manage. The pre-shampoo application method - applied before washing - is unconventional but highly effective.

At current pricing for 4.2 oz, it's a luxury purchase, but the concentrated formula means a little goes a long way. For those with fine or color-treated hair that has lost elasticity, Elasticizer is genuinely transformative.