Polyseal Screw Cap (28 mm | 1.125 in)

Airtight 28 mm Black Polyseal Screw Caps with Conical Polyethylene Liner for Compatible Wide-Mouth Wine Bottles, Beverage Storage, Samples, Homebrewing, and Winemaking

28 mm Polyseal Screw Caps are designed to provide a secure, airtight closure for compatible wider-mouth wine bottles and liquid storage containers. Each cap features a built-in conical polyethylene liner that helps create a tight, leak-resistant seal to preserve freshness, flavour, and product quality.

Made from durable black plastic, these reusable screw caps are a practical choice for home winemaking, homebrewing, beverage storage, liquid samples, and general liquid packaging. They are ideal for bottles that require a dependable screw-on closure with added sealing performance.

These caps are easy to apply, remove, and reseal without special tools, making them useful for small-batch bottling, storage, samples, and compatible food or beverage applications.

Key Features

• Size: 28 mm / 1.125 in.
• Polyseal Design: Built-in conical polyethylene liner helps create an airtight, leak-resistant seal.
• Compatible Bottle Fit: Designed for select wider-mouth wine bottles and compatible 28 mm openings.
• Airtight Closure Support: Helps reduce air exposure when used with compatible bottles.
• Leak-Resistant Seal: Helps protect liquids during storage and handling.
• Durable Black Plastic: Strong construction supports repeated use when cleaned and maintained properly.
• Easy Screw-On Closure: Simple to apply, remove, and reseal without special tools.
• Made in the USA: Manufactured for reliable quality and performance.
• Versatile Use: Great for homebrewing, winemaking, beverage storage, samples, and compatible liquid products.
• Reusable Closure: Can be reused when the cap and liner remain clean, intact, and in good condition.

Common Uses

Use these 28 mm Polyseal screw caps for compatible wide-mouth wine bottles, home winemaking, homebrewing, beverage storage, liquid samples, specialty drinks, small-batch bottling, food and beverage storage, and airtight bottle closure applications.

Best For

• Compatible wide-mouth wine bottles
• Beverage storage
• Wine storage
• Home winemaking
• Homebrewing
• Liquid samples
• Specialty drinks
• Small-batch bottling
• Food and beverage storage
• Compatible 28 mm bottle openings

Frequently Asked Questions

• Q: What size are these Polyseal screw caps?
  A: These caps are 28 mm / 1.125 in.
• Q: What bottles do these caps fit?
  A: They are designed for select wider-mouth wine bottles and compatible 28 mm bottle openings.
• Q: What makes these Polyseal caps different from regular screw caps?
  A: Polyseal caps include a built-in conical polyethylene liner that helps create a tighter, more leak-resistant seal.
• Q: Are these caps airtight?
  A: They are designed to help create an airtight seal when used with compatible bottles.
• Q: What colour are the caps?
  A: These caps are black.
• Q: Where are these caps made?
  A: These Polyseal screw caps are made in the USA.
• Q: Can these be used for winemaking?
  A: Yes. They are suitable for compatible wine bottles and home winemaking storage applications.
• Q: Are these caps reusable?
  A: Yes. They can be reused when properly cleaned, sanitized, dried, and inspected, as long as the cap and liner remain in good condition.

Important Use Notes

• Use only with compatible 28 mm bottle openings.
• Confirm bottle neck finish and cap compatibility before use.
• Caps are designed for compatible wider-mouth wine bottles and liquid storage containers.
• Clean before first use.
• Sanitize before beverage or food-contact use.
• Inspect before use and do not use if cracked, warped, damaged, or contaminated.
• Store clean and dry between uses.
• Reuse only when the cap and liner remain clean, intact, and in good condition.
• Not recommended for pressure-building or carbonated beverages unless the bottle and closure are specifically confirmed suitable.

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