Tosylamide/Epoxy Resin
Tosylamide/Epoxy Resin is a film-forming ingredient commonly used in UK nail polishes and long-wear manicure products. It helps create a tough, glossy, chip-resistant coating that lasts longer on the nails. You’ll most often find it in salon-quality or at-home gel-style nail lacquers rather than skincare or haircare.
How it works in skincare
In cosmetics, Tosylamide/Epoxy Resin works by forming a durable, flexible polymer film on the nail surface once the solvent evaporates. This film enhances adhesion of the colour coat, increases chip resistance and adds a smooth, high-shine finish. It is valued in long-wear nail formulations because it helps the polish withstand daily wear while maintaining flexibility to prevent cracking or peeling.
Key benefits
- Creates a hard-wearing, chip-resistant finish
- Provides a smooth, high-gloss shine
- Improves adhesion of nail colour to the nail plate
- Enhances flexibility to reduce cracking
- Contributes to longer-lasting manicures
- Helps maintain a professional salon-style look
Best for
nail care, weak or brittle nails
Where it comes from
Tosylamide/Epoxy Resin is a synthetic copolymer produced from toluene sulfonamide and epoxy compounds. It is created through industrial polymerisation processes rather than being derived from any plant, mineral or natural source.