VWR® Black Phenolic Caps provide a wide range of chemical compatibility and temperature tolerance with an assortment of liners to choose from.
Pulp/Vinyl general purpose liners are commonly used for food, beverage, medical and chemical applications packed at less than 120 °F, including mild acids, alkalis, solvents, alcohols, oils and aqueous products; not recommended for active hydrocarbons or bleaches.
Solid PE liners offer good chemical resistance and low moisture vapor transmission rate. They are great for higher concentration acids and alkalis. Good for non-oil products filled at room temperature. Because this lining system is paperless, your samples will not be contaminated with fiber or paper particles from the closure.
Rubber lined caps are autoclavable. The liner is compliant with FDA 21 CFR 177.2600. Rubber articles intended for repeated use. The liner exhibits good resiliency and resistance to moisture vapor. The closures provide consistent adherence to close dimensional tolerance.
PE cone liners form an exceptionally tight seal and offer a good chemical barrier. This liner molds itself around the sealing areas of the finish as the cap is screwed on virtually eliminating leakage, evaporation, contamination, binding and backing off. Great for everything from liquids to soaps and macro-invertebrates.
PTFE-faced foam liners resist attack from virtually all chemicals at room temperature and provides resilience for a tight seal with a low moisture transmission rate.
Envase: Packaged 12 bags of 12 caps per case for convenience.