Brazil Protein SOS Protein Fluid 300 ml is the leave-in silk-protein fluid for damaged, over-processed hair, built around hydrolyzed silk that helps condition and smooth weakened lengths. It is the daily, no-rinse partner to the deep mask: smoothed through damp mid-lengths and ends, it leaves fragile hair softer, easier to detangle and better protected through drying and styling.

Why the leave-in fluid

Damaged, over-processed hair loses moisture and roughens along the mid-lengths and ends, and those lengths need protection every day, not just on wash day. This fluid is that daily layer. It carries hydrolyzed silk that helps condition and smooth the weakened cuticle, in a light leave-in base that adds slip and coats the hair. Smoothed through damp ends and left in, it makes fragile hair easier to detangle and helps protect it as it dries and is styled, so it feels softer and looks less rough.

Key ingredients

• Hydrolyzed silk: the named protein that helps condition and smooth weakened, porous lengths.
• Light leave-in base: adds slip and coats the hair, so damaged ends detangle and feel softer.
• Smoothing agents: help protect the lengths through drying and styling for a smoother finish.

What to expect

Hair feels softer and smoother, detangles more easily and looks less rough at the ends. It is a leave-in conditioning fluid, not a smoothing step: it conditions and protects the feel of the hair, it does not straighten it or change its structure. Use it after washing on damp hair, or on dry ends through the day, and follow with an oil if the ends are very dry.

Who it is for

• Dry, chemically-treated or bleached hair that needs daily conditioning and protection
• Hair kept between colour, smoothing or keratin services that roughens at the ends
• Anyone who wants a light leave-in for detangling and softness without weighing hair down
• Salons offering a take-home leave-in alongside a deep treatment

Who it is not for

• Fine hair that turns limp quickly, where even a light leave-in can feel like too much on the roots
• Anyone wanting the smoothing itself: that is a salon Brazil Protein service
• A deep weekly treatment: that is the SOS Protein Mask, not this daily fluid
• Loading it at the roots: smooth a little through the driest ends so the hair stays light.

Professional tip

Warm one or two pumps between the palms and press it through the mid-lengths and ends, keeping it off the roots so the hair stays light. On very porous hair, apply it to damp hair before drying so it protects the lengths through the heat, and add a touch more to dry ends afterwards if they still feel rough. Less is more: build it up rather than starting with too much.

How to use

1. Warm one or two pumps between the palms.
2. Smooth it through the mid-lengths and ends of damp or dry hair, keeping it off the roots.
3. Do not rinse; comb through and style as usual.
4. Add a touch more to dry ends through the day if needed.

Where it fits in your routine

The SOS Protein Fluid is the daily leave-in of the Brazil Protein routine, the no-rinse layer that keeps damaged lengths protected between deep treatments. Pair it with the SOS Protein Mask as the weekly intensive step, and finish with a little Mix Brazilian Oil for shine. For everyday washing, the Day by Day Home Care Duo keeps the hair soft between treatments.

In short

• The leave-in silk-protein fluid for damaged, over-processed hair.
• Built around hydrolyzed silk that helps condition and smooth weakened lengths.
• A daily no-rinse layer, not a smoothing step or a deep mask.
• 300 ml bottle, professional and home use.