Phenolic (Polycone) Caps
Phenolic polycone caps feature a hard, thermoset shell with a polycone liner that conforms to the container's finish for an airtight seal. This combination makes them an excellent choice for products that require strong chemical resistance, including essential oils, solvents, reagents, and pharmaceutical liquids.
The rigid phenolic material will not flex or warp over time, which ensures consistent closure performance across long shelf lives. These caps are available in multiple sizes to fit standard continuous thread finishes on our glass bottles and plastic bottles. Burch Bottle stocks phenolic polycone caps at wholesale pricing with no minimum order.