Trimethylsiloxysilicate
Trimethylsiloxysilicate is a silicone-based resin used in UK beauty products to create long-wearing, transfer-resistant formulas. It forms a flexible, breathable film on skin, lips or hair that helps makeup and skincare stay put without feeling heavy. You'll often find it in long-lasting lipsticks, mascaras, primers and waterproof sunscreens.
How it works in skincare
In cosmetics and skincare, Trimethylsiloxysilicate works by forming a lightweight, water-resistant film on the surface of skin, lips or lashes once the product dries. This silicone resin improves adhesion and flexibility, preventing smudging, fading or transfer while allowing the skin to breathe. It is prized in UK formulations for delivering high-performance, long-wear results in lip colours, eye makeup and protective primers without the heaviness associated with older film-formers.
Key benefits
- Creates long-wearing, transfer-resistant makeup
- Forms a flexible, breathable film on skin and lips
- Improves water and sweat resistance
- Helps pigments adhere evenly for better colour payoff
- Enhances the smoothness and finish of lip and eye products
- Provides a lightweight, non-greasy feel
Best for
normal skin, oily skin, combination skin, mature skin, long-wear makeup users
Where it comes from
Trimethylsiloxysilicate is a synthetic silicone polymer derived from silica, a mineral found abundantly in sand and quartz. It is produced through chemical synthesis rather than directly extracted from a plant or natural source.