Petrolatum
A semi-solid jelly refined from petroleum. A strong occlusive used in hair grease, edge products and to protect the scalp before a relaxer.
Curly Girl note: A heavy, non-water-soluble occlusive that builds up; avoided by the Curly Girl Method.
About Petrolatum
Petrolatum is a semi-solid blend of hydrocarbons refined from petroleum — the familiar petroleum jelly. Like mineral oil, cosmetic grades are highly purified, stable and rarely irritating. It is one of the most effective occlusives available, which means it forms a barrier that strongly slows water loss.
In textured hair care, petrolatum is the base of many traditional hair greases, pressing oils and edge products. It adds heavy shine, holds flyaways down and keeps ends from drying out between washes. Stylists also use petrolatum-based 'base' creams on the scalp, hairline and ears before applying a relaxer, because the barrier helps protect skin from the alkaline chemicals.
The same barrier causes problems if you rely on it for moisture. Petrolatum doesn't add water to hair — it only keeps in what's there — and it is not water-soluble. It builds up quickly, can attract lint and dust, and needs a cleansing shampoo to remove. That's why the Curly Girl Method avoids it and why people with low porosity or fine hair often find it weighs hair down.
Who may still find it useful: people protecting the scalp before chemical services, people with very dry relaxed ends, and those who wash with a regular shampoo anyway. Apply it sparingly to the ends or hairline rather than the whole scalp, since heavy scalp use can trap oil and flakes.
How our checker rates it
| Mode | Rating | Why |
|---|---|---|
| Curly Girl | Avoid | Mineral oil or petrolatum — seals but needs sulfates to remove. Not CG-friendly. |
| Relaxed hair | OK | No concerns for this mode. |
| Low porosity | Caution | Heavy ingredient near the top of the list — can sit on low-porosity hair and build up. |
| Protein-sensitive | OK | No concerns for this mode. |
Ratings assume it is listed near the top of the label. After the first preservative or fragrance (likely 1% or less) most cautions soften.
What mineral oil / petrolatum ingredients do
Petroleum-derived oils and jellies that seal very well but do not rinse off with gentle cleansers and can build up.
This one is on the heavy side, so it can weigh down fine or low-porosity hair if it sits near the top of a product’s list.
Also listed as
- petroleum jelly
- white petrolatum
- soft paraffin
- yellow petrolatum
- petrolatum usp
Similar ingredients
Sources
Last data update:
- Robbins CR. Chemical and Physical Behavior of Human Hair. 5th ed. Springer; 2012. Reference text on hair structure, surfactants, conditioning agents, protein, heat and chemical treatments.
- Massey L, Chiu M. Curly Girl: The Handbook. Workman Publishing; 2011. Origin of the Curly Girl Method rules (no sulfates, no non-soluble silicones, no drying alcohols).
- Cosmetic Ingredient Review (CIR). Ingredient safety assessments. Safety assessments for cosmetic ingredients cited on ingredient pages.
How we research and update pages: editorial policy. Spotted an error? Tell us.