Conditioners Explained
Conditioners are essential haircare products designed to improve the feel, appearance, and manageability of hair by providing lubrication and nourishing ingredients.

The Science of Conditioning
Conditioners primarily function by addressing issues that arise from shampooing. While shampoo effectively cleanses the hair and scalp by removing dirt, oils, and product buildup, this process can sometimes strip away some of the natural lipids that contribute to hair's smoothness and shine. Shampooing can also cause the hair's outermost layer, the cuticle, to lift. A raised cuticle can lead to tangling, frizz, and a dull appearance.
Conditioners combat these effects by depositing various ingredients onto the hair shaft. These ingredients typically include cationic surfactants, emollients, humectants, and proteins. Cationic surfactants, which have a positive electrical charge, are attracted to the negatively charged areas of damaged hair. This attraction creates a smoother surface, reducing friction and static electricity. Emollients, such as fatty alcohols and natural oils, provide lubrication, making the hair feel softer and easier to comb. Humectants draw moisture from the air into the hair, enhancing hydration, while proteins can temporarily strengthen the hair cuticle.
Types of Conditioners
Not all conditioners are created equal. Different formulations cater to specific hair needs and provide varying levels of conditioning.
Rinse-Out Conditioners
These are the most common type of conditioner. Applied after shampooing, they are left on for a few minutes and then rinsed thoroughly. They provide daily detangling, smoothness, and shine, and are suitable for most hair types.
Leave-In Conditioners
Designed to be applied to towel-dried hair and not rinsed out, leave-in conditioners offer continuous conditioning and protection. They are particularly beneficial for dry, damaged, or tangled hair, providing extra moisture, frizz control, and heat protection.
Deep Conditioners / Hair Masques
These are intensive treatments formulated with a higher concentration of nourishing ingredients. Applied weekly or bi-weekly, deep conditioners are left on for a longer duration (typically 5-20 minutes) to allow for deeper penetration. They are ideal for repairing significant damage, adding intense moisture, and improving hair elasticity.
Co-Wash / Cleansing Conditioners
Co-washing involves using a conditioning cleanser instead of a traditional shampoo. These products lightly cleanse the hair while simultaneously conditioning, making them suitable for very dry, curly, or coily hair types that require minimal stripping of natural oils.
Protein Conditioners
Protein conditioners contain hydrolyzed proteins that can temporarily fill in gaps in the hair cuticle. They are beneficial for weak, brittle, or chemically damaged hair, helping to improve strength and reduce breakage. It is important to use protein treatments judiciously, as excessive protein can lead to stiffness.
Key Ingredients and Their Functions
| Ingredient Category | Function | Examples |
|---|---|---|
| Cationic Surfactants | Reduce static, detangle, smooth cuticle | Behentrimonium chloride, Cetrimonium chloride |
| Emollients | Add softness, shine, lubrication | Cetyl alcohol, Stearyl alcohol, Jojoba oil |
| Humectants | Attract and retain moisture | Glycerin, Panthenol (Vitamin B5) |
| Proteins | Temporarily strengthen, repair cuticle | Hydrolyzed wheat protein, Keratin |
| Silicones | Provide slip, shine, heat protection | Dimethicone, Cyclopentasiloxane |
| pH Adjusters | Balance hair pH (typically acidic to close cuticle) | Citric acid, Lactic acid |
Choosing the Right Conditioner
Selecting the appropriate conditioner depends on your hair type, concerns, and desired results. Consider the following:
- Fine Hair: Look for lightweight formulas that won't weigh down the hair. Avoid heavy butters and oils.
- Thick/Coarse Hair: Can benefit from richer, more emollient formulas that provide intense moisture and control.
- Dry/Damaged Hair: Deep conditioners, leave-in conditioners, and formulas rich in humectants and emollients are beneficial.
- Oily Hair: Opt for lighter, balancing conditioners, focusing application on the mid-lengths and ends rather than the scalp.
- Color-Treated Hair: Choose color-safe formulas designed to protect artificial pigment and minimize fading. These often contain UV filters.
- Curly/Coily Hair: Co-washes, leave-in conditioners, and deep conditioners with high humectant and emollient content are often preferred to maintain moisture and definition.
Application Tips
For optimal results, apply conditioner to freshly shampooed, damp hair. Gently squeeze out excess water before application to prevent dilution of the product. Focus the conditioner primarily on the mid-lengths and ends of the hair, as these areas tend to be drier and more prone to damage. The scalp generally produces its own natural oils, so applying conditioner directly to the roots can sometimes lead to greasiness or weigh hair down. Use a wide-tooth comb to distribute the conditioner evenly and detangle the hair gently while the product is on. Rinse thoroughly with lukewarm water until the hair feels clean and free of residue.
Find these ingredients in Watermans products
- Panthenol (Provitamin B5) — you will find this ingredient in our Heat Protection Spray.