Olaplex No.5 Leave-In Conditioner 100 mL
- 100 mL (3.3 fl oz) tube
- Heat protection to 450F / 232C
- 72 hr frizz control and humidity resistance claimed
- 91% easier detangling, 71% less breakage claimed
- 1 pump for fine hair, 2 for medium or coarse
- Unscented, vegan, color safe
Last refreshed Sep 7, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A light leave-in cream that seals split ends, cuts frizz and adds heat protection without weighing hair down. The listing mixes in rinse-out and shampoo text, so follow the leave-in directions.
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ASIN: B0DQ81ZCJGModel: N°.5 Leave-InCategory: Hair Conditioners
Overview
Bathroom counters between washes are where this Olaplex leave-in lives, used on damp hair before styling or on dry ends. It seals split ends, softens and smooths, controls frizz in humidity and protects against heat from tools.
Heat protection plus split-end repair in a leave-in saves a step before blow-drying. The listing copies text from rinse-out and shampoo products, which makes the directions confusing.
Who it's for
Frizzy, damaged or color-treated hair that gets blow-dried will gain the most from the heat shield. Very fine hair may need only a small amount to avoid weight.
Pros and cons
- Heat protection for hot tools
- Seals split ends
- Frizz and humidity control
- Vegan and color safe
- Listing mixes up directions
- Small tube for long hair
- Clinical claims lack test detail
Performance notes
A thin cream coats the hair fiber, which seals split ends and adds slip for detangling. That same coating buffers heat from tools and resists humidity, so frizz stays down longer.
Specifications
| Brand | Olaplex |
|---|---|
| Model | N°.5 Leave-In |
| Dimensions & fit | |
| Size | 3.3 Fl Oz (Pack of 1) |
| Item Dimensions | 1.95 x 1.95 x 5 inches |
| Capacity & performance | |
| Liquid Volume | 100 ml |
| Age Range Description | Adult |
| Construction & materials | |
| Material Features | Vegan, cruelty free, gluten free |
| Material Type Free | Gluten, paraben, phosphate, phthalate |
| Included components | |
| Package Type Name | Tube |
| Unit Count | 3.3 Fluid Ounces |
| Other details | |
| Hair Type | All, chemically treated, coily, color treated, curly, damaged, straight, wavy |
| Hair Conditioner Type | Leave-in conditioner |
| Item Form | Cream |
| Scent Name | Unscented |
| Protection | 450F / 232C heat protection |
| Recommended Uses For Product | Apply to clean, damp hair. Fine: 1 pump. Medium or coarse: 2 pumps |
| Active Ingredients | Lactic acid |
| Additional Features | Detangling, Leave In, Moisturizing |
Frequently asked questions
Is Olaplex No.5 Leave-In a rinse-out conditioner?
No. The title and specs call it a leave-in, applied to clean damp hair or dry ends. One bullet copies rinse-out directions, so rely on the leave-in instructions.
How much Olaplex No.5 Leave-In should I use?
Start with 1 pump for fine hair or 2 pumps for medium or coarse hair, and add more as needed.
Does Olaplex No.5 Leave-In protect from heat?
Yes, up to 450F / 232C.
Is Olaplex No.5 Leave-In color safe?
Yes. It is listed for color-treated and chemically treated hair.