Most repairing lip balms fail in one of two opposite ways. Too much wax makes a chalky stick that spreads badly and adds little real occlusion. Too much free oil makes a greasy slick that is gone in twenty minutes and takes the repair claim with it. A credible repair formula is an occlusion story: a semi-occlusive layer that slows water loss from the lip, with just enough liquid emollient left at the surface to keep the feeling comfortable for hours.
The occlusive core: 66.5% of the formula
| Ingredient | Parts | Why |
|---|---|---|
| White Petrolatum (8009-03-8) | 46.5 | Benchmark semi-occlusive; forms the water-loss barrier |
| White Mineral Oil 22# (8012-95-1) | 20 | Light liquid hydrocarbon; thins the petrolatum phase, adds slip |
| Caprylic/Capric Triglyceride (65381-09-1) | 10 | Plant-derived emollient carrier; carries antioxidant and oil-soluble actives |
| Bis-Diglyceryl Polyacyladipate-2 (82249-33-0) | 10 | Paste emollient with lanolin-like cushion and gloss; improves oil retention |
| Beeswax (8012-89-3; 8006-40-4) | 8 | Skeleton wax |
| Paraffin Wax (8002-74-2) | 5 | Hardness adjustment |
| Vitamin E (Tocopherol) (10191-41-0) | 0.3 | Antioxidant for the oil phase |
| Fragrance | 0.2 | Scent |
Petrolatum at 46.5% is doing the heavy lifting. It is the reference semi-occlusive in dermatology precisely because it forms a breathable-but-effective barrier rather than sealing the skin completely. The 20% white mineral oil is not dilution for its own sake: it lowers the viscosity of the petrolatum phase so the stick shears easily on the lip while staying hydrocarbon-pure (a 22# cosmetic grade balances slip and feel). Together they are 66.5% of the formula - enough to support a repair claim, but not so much that the stick slides off the lip.
The 20% that keeps it from feeling waxy
Caprylic/capric triglyceride brings a light, plant-derived slip and - importantly - is the carrier that solubilises the vitamin E and any oil-soluble actives you add later. Bis-diglyceryl polyacyladipate-2 is the texture secret: a high-MW paste ester with a lanolin-like cushion and a strong affinity for the skin surface, it improves oil retention and gloss so the balm still feels rich after the petrolatum film has set. Without these two, a 66.5% occlusive core feels medicinal; with them, it feels like care.
The skeleton: only 15% wax
Beeswax (8%) plus paraffin (5%) is deliberately modest. The skeleton has one job - hold the stick shape and give clean mould release - while the occlusive and emollient phases do the functional work. If your bench version drags on application, resist the urge to add more oil first; check the wax ratio and the cooling profile instead. Our oil-phase structurants guide covers how beeswax, its alternatives and petrolatum divide this work.
Bench checks for a repair claim
- Hardness at 25 °C (penetration or break test) - the most common field complaint on balms is seasonal softening, not the formula itself.
- Pay-off and glide at 25 °C and after a 45 °C / 25 °C cycle.
- Gloss over time - a balm that loses gloss in an hour is losing its surface emollient phase to migration or absorption.
- Evidence for the claim. If you want to put repair on the label, plan an in-use TEWL or corneometry study; occlusion is measurable, and reviewers know it.
The full nine-family lip programme, with this balm as one of four reference formulas, is on our lip care ingredients landing page.
White Petrolatum, White Mineral Oil, Caprylic/Capric Triglyceride, Bis-Diglyceryl Polyacyladipate-2, Beeswax, Paraffin Wax and Vitamin E are available from Shanghai Better Chemical with COA, TDS and samples on request.