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
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Size: 28 mm / 1.125 in.
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Polyseal Design: Built-in conical polyethylene liner helps create an airtight, leak-resistant seal.
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Compatible Bottle Fit: Designed for select wider-mouth wine bottles and compatible 28 mm openings.
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Airtight Closure Support: Helps reduce air exposure when used with compatible bottles.
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Leak-Resistant Seal: Helps protect liquids during storage and handling.
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Durable Black Plastic: Strong construction supports repeated use when cleaned and maintained properly.
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Easy Screw-On Closure: Simple to apply, remove, and reseal without special tools.
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Made in the USA: Manufactured for reliable quality and performance.
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Versatile Use: Great for homebrewing, winemaking, beverage storage, samples, and compatible liquid products.
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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
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Q: What size are these Polyseal screw caps?
A: These caps are 28 mm / 1.125 in.
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Q: What bottles do these caps fit?
A: They are designed for select wider-mouth wine bottles and compatible 28 mm bottle openings.
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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.
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Q: Are these caps airtight?
A: They are designed to help create an airtight seal when used with compatible bottles.
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Q: What colour are the caps?
A: These caps are black.
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Q: Where are these caps made?
A: These Polyseal screw caps are made in the USA.
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Q: Can these be used for winemaking?
A: Yes. They are suitable for compatible wine bottles and home winemaking storage applications.
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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.
