Sealing Mask is for people across all hair types who want a deeper moisture and smoothing boost than their everyday conditioner provides, but don't want to commit to a long sit time — it works in as little as one minute. It's a good fit for anyone managing frizz or humidity swelling who wants a quick weekly ritual rather than a daily product.

Within the Smooth line, this is the intensive step: it's meant to be used alongside Super Smooth Shampoo and Conditioner a couple of times a week, not in place of daily conditioning.

The distinguishing feature of Sealing Mask is speed relative to a typical hair mask: it's formulated to deliver a measurable smoothing effect in one to three minutes rather than the 10-20 minutes many deep-conditioning masks call for, which is why Paul Mitchell positions it as a realistic weekly add-on rather than an occasional treat.

It's also built specifically around humidity resistance, not just softness — the squalane and silicone blend is meant to keep the cuticle sealed against moisture in the air, which is what the brand's all-day humidity resistance claim is based on.

• Use 1-2 times per week
• Apply to clean, damp hair
• Leave on for 1-3 minutes, then rinse
• For best results, pair with Super Smooth Shampoo and Conditioner

• Pro: works in a short 1-3 minute sit time, so it fits into a normal shower routine
• Pro: brand testing reports up to 69% smoother hair and all-day humidity resistance
• Pro: formulated for all hair types rather than a specific texture
• Con: relies on a stack of silicones (Amodimethicone, Trimethylsiloxyamodimethicone, Dimethicone, Phenyl Trimethicone) for its effect, which can build up without occasional clarifying
• Con: meant for 1-2x weekly use, so it doesn't replace a daily conditioner
• Con: strongly fragranced formula, which may not suit people avoiding scented hair products