Your Summer Heat Shield: Castor & Keratin Heat Protectant

We tend to think of heat protectant as a pre-blow-dry step. In summer, it earns a place in your daily ritual—even on no-heat days. The Castor & Keratin Heat Protectant shields hair from styling tools and from sun, wind, salt and chlorine.

An invisible barrier, a featherlight finish

The leave-in formula is light and never greasy. It builds a near-invisible film around each strand, locking in hydration, taming frizz and leaving a silky, luminous finish. Slip it into your beach bag and it becomes a true on-the-go essential.

How to use it through the season

Before sun exposure, a few sprays on the lengths are enough to protect. After a swim in the sea or pool, apply again to reseal the cuticle and preserve hydration. It also works as a styling leave-in, making detangling and finishing effortless.

Prefer a richer leave-in for thirsty curls or coils? Try the Prickly Pear & Keratin Leave-In—same protective logic, more nourishment for textured hair.

For every hair type

Both leave-ins are color-safe and gentle enough for sensitized lengths, and they layer beautifully with any of our routines. This summer, give your hair complete protection—light, effective, and never at the expense of shine or feel.

Discover the full Castor & Keratin range to build your seasonal routine.