Styling products explained

Key takeaways

• Product type is mostly two choices: how much hold and how much shine. Holders are film-forming polymers (PVP, VP/VA, acrylates), waxes or clays. Shine comes from oils, waxes, petrolatum, silicones and glossy polymers. Matte comes from clays, silica and powders.
• Water-based products wash out and oil-based ones need more shampoo. Gels, mousses and many creams are water-soluble polymer systems. Pomades with petrolatum, lanolin or wax are harder to rinse. Dermatologists advise a clarifying shampoo before your moisturising shampoo if you use gels, oils, creams or pomades on curly hair.
• Long-lasting hold is not free. The American Academy of Dermatology tells people to cut back on "long-lasting hold" products and not to comb hair straight after applying product, because that can break hair and add to hair loss over time.
• Heavy pomades on the hairline may trigger acne. "Pomade acne" was described in a 1970 paper (Plewig 1970). Oil on forehead skin is the proposed mechanism, and we found no recent retest.
• Humidity is the enemy of hold. Many hold polymers absorb water and soften, and industry papers design "humidity resistance" formulas (Keenan 2011, Dow Chemical authors). In curly hair, humidity changes friction and perceived frizz by touch (Skedung 2021, L'Oreal authors).
• Silicones are not simply good or bad. A 2025 review describes them as film formers that reduce friction, prevent moisture loss and add shine and heat protection, with build-up concerns for water-insoluble types and newer water-dispersible forms (Carvalho 2025). See silicones.
• Aerosol hairsprays are safe in normal use but can harm in misuse. A manufacturer-authored assessment of one hairspray resin, based on rodent inhalation data, found it acceptable for consumers under modelled use (Carthew 2002). A case report describes lung disease after hairspray inhalation in one patient (Sato 2021). Spray in a ventilated room.
• Labels may omit what is inside. A small US study of 18 hair products used by Black women detected 45 target chemicals linked to hormone disruption or asthma, mostly not on the label, including cyclosiloxanes in anti-frizz products. It is a screening study, not proof of harm (Helm 2018).

The product matrix

The hold and finish columns are typical consumer descriptions, not lab measures. Individual products vary widely. This table is formulation knowledge, not trial evidence.

How hold works

• Film formers dry into brittle, glue-like bridges between hairs. They are moisture sensitive and flake or "crunch" if overused.
• Waxes and clays work by adhesion and friction rather than a film, so they stay reworkable and wash out less easily.
• Thickeners such as carbomer make gels and creams spreadable.
• Cationic polymers (polyquaterniums) cling to negatively charged hair and add slip and some hold.
• Texturising salts and silica add grit and grip, not a film and not strength to the hair.

What has been measured

Missing: trials of which gel holds best, head-to-head wax comparisons, and any independent test of "no-build-up" or "sulfate-free" claims.

What it means by hair profile

• Fine, straight (1A to 1B), low density: light mousse or powder at the roots. Avoid heavy pomades, which flatten hair and show scalp.
• Medium to coarse, straight or wavy (1C to 2C): clay, paste or fibre for texture, water-based pomade for polished looks.
• Curly and coily (3A to 4C): moisture first (leave-in or cream), then gel or a flax-type definition product. Heavy butters and oils define and shine but build up more and may need clarifying. See styling techniques for curly and wavy hair.
• High porosity: film formers can feel stiff and rough, and sealing creams or leave-ins help.
• Oily scalp or acne-prone forehead: water-based, light products, and wash product out nightly.
• Dry or itchy scalp: avoid alcohol-heavy hairsprays on the scalp and watch for contact dermatitis. PVP polymers have caused allergy in a rare case (see PVP).

Myths and facts

• Myth: gel damages hair. Fact: gel itself is not toxic to hair. Repeatedly combing through stiff, long-hold product can break it.
• Myth: alcohol in styling products always dries hair. Fact: we found no study. Fatty alcohols such as cetyl and stearyl are conditioning ingredients.
• Myth: silicone-free is always better. Fact: it depends on the silicone type and your hair (Carvalho 2025).
• Myth: hold is the same in all weather. Fact: humidity matters for hold and frizz.
• Fact: salt sprays, powders and clays make texture by adding grit and friction, not strength.

Practical recommendations

1. Start from the look: matte and textured (clay, paste, powder) or polished and shiny (water-based pomade, gel, oil pomade).
2. Gels and mousses go on damp hair, pastes and clays on dry or towel-dried hair, and sprays go on last.
3. Use the least amount that holds and add more gradually.
4. Wash product out nightly if hairline acne or flaking appears. A clarifying shampoo roughly monthly suits heavy pomade users. This is stylist practice.
5. Do not comb through set product.
6. Spray in ventilated spaces and keep aerosols away from eyes and children.
7. Patch test new products if you have a history of contact allergy.
8. Be sceptical of marketing numbers such as "24-hour hold" or "100% natural", and read the ingredient list.

Bottom line

Choose a product by the finish you want and the hair you have, not by ingredient fear. The safety record of mainstream hold ingredients is reasonable, performance claims are mostly manufacturer-level, and the practical risks are buildup, hairline breakouts and breakage from combing through stiff product.