Black Polyseal Cap

Equip your commercial bottling line with a bulk case of Black Polyseal Screw Caps. Designed to fit standard 38-400 neck finish bottles—including 64 oz growlers and half-gallon jugs—these premium phenolic caps feature an internal LDPE cone liner. The polyseal liner compresses into the bottle neck to create an airtight, leak-proof barrier that holds carbonation and prevents liquid evaporation.

Features & Benefits

• Conical Polyseal Leak Protection: Internal cone liner wedges securely inside the bottle neck, forming a tight, multi-point seal that prevents leaks and gas loss.

• Carbonation & Freshness Retention: Locks in carbonation and seals out oxygen, making it ideal for craft beer, cider, kombucha, and spirits.

• Bulk Commercial Savings: Case quantity of 1,700 caps reduces per-unit costs, maximizing profit margins for commercial breweries and packagers.

• Chemical & Acid Resistance: Durable black phenolic plastic construction withstands alcohol, high-acid liquids, essential oils, and sanitizing solutions.

• Smooth Ergonomic Grip: Ridged outer skirt provides reliable grip for effortless manual capping or rapid removal by consumers.

Product Specifications

• Capacity / Volume: Fits standard 38-400 continuous thread bottle necks (64 oz growlers, 0.5 gallon jugs, 1/2 gallon jars)

• Pack Quantity: Single (1 cap) or Case (1700 caps)

• Color / Finish: Black

• Material: Heavy-Duty Phenolic Plastic with Low-Density Polyethylene (LDPE) Cone Liner

• Neck Finish / Closure Size: 38-400 Continuous Thread

• Safety & Compliance: Food-Grade Safe, BPA-Free, Lead-Free

• Care Instructions: Reusable; hand wash recommended to protect internal cone liner integrity