Choose from the following cap types to purchase closures in bulk without attached bottles. For a description of specific cap types and compatibility, scroll to the bottom of this page or click here.
Description of Cap Types
Thermoset F217 & Teflon® Lined Green Caps are known for providing the widest range of chemical compatibility and for being the most temperature tolerant of plastic closures. The color green easily identifies the Teflon® liner system. Foam backed Teflon® PTFE liners resist attack from virtually all chemicals at room temperature and provides resilience for a tight seal with a low moisture transmission rate. F217 has a low density foam core between two solid layers of LDPE. Uses include analytical lab samples, high purity chemicals, strong acids solvents, environmental samples, pharmaceuticals, and diagnostic reagents. Thermoset caps cannot be re-melted or re-shaped after they are cured and are not recyclable.
Phenolic Rubber Lined Caps are autoclavable. The Liner is compliant with FDA 21 CFR 177.2600 Rubber Articles Intended for Repeated Use. The liner exhibit good resiliency and resistance to moisture vapor. The closures provide consistent adherence to close dimensional tolerance.
Phenolic Pulp/Vinyl Lined Caps are perfect for general use. The liner is made of a vinyl coating applied to high density polyethylene coated paper and then it is laminated to pulpboard. This general purpose liner is 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.
Phenolic Pulp/Tin Foil Lined Caps: black thermoset (phenolic) caps with tin foil liners offer good chemical resistance and are typically used with solids and powders. Good resistance to hydro-carbons, alcohols, ketones and oils.
Phenolic Polyseal™ Cone Lined Phenolic Caps 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, to macro-invertebrates.
Polypropylene Hole Caps with Teflon PTFE/Silicone Septa: polypropylene hole caps are known for good impact strength, cost effectiveness, and pliability. The Teflon® PTFE/Silicone septa resists coring and is recommended when multiple injections are required. This .125" septa has excellent resealing qualities.
Polypropylene Caps with Teflon® Disc : polypropylene caps with .015" Teflon® disc offer excellent chemical compatibility. The Teflon® disc is chemically inert and heat resistant. Polypropylene caps are known for impact strength, cost effectiveness, and pliability.
Polypropylene SurdeeSeal® PE Foam Lined Caps are known for good impact strength, cost effectiveness, and pliability. These polypropylene closures with foamed polyethylene liners have excellent sealing characteristics and offer good chemical resistance including acids, alcohols, alkalis, aqueous products, cosmetics, household oils and solvents.
