SINGLE SIDE LAB INSTRUMENT NON-STICK BLACK TIPS, SIZE 2 (LARGE). FLEXIBLE - NO STICKING - NO PULLING. Non-Stick Flexi-Tips have a true non-stick surface, flexible enough to produce fluid shapes but firm enough to compact and condense viscous composite material. The key to their performance is the solid, flexible silicone tip. Specially designed for sticky composite resins, acrylics, epoxies, sealants, lubricants, and waxes.