19.5mm OD × 12.5mm ID × 0.5mm Ring Universal Aluminum Foil Gasket for Laboratory Reagent Bottle Sealing

The 19.5mm OD * 12.5mm ID * 0.5mm Ring Universal Aluminum Foil Gasket is designed for laboratory reagent bottle sealing, liquid transfer, and tube-insertion applications. This ring-shaped sealing liner features a precise outer diameter of 19.5mm, an inner diameter of 12.5mm, and a thin 0.5mm structure, making it suitable for compact reagent bottle caps and laboratory container closures. The central aluminum foil area can be pierced or inserted with a guide tube, allowing laboratory users to pour, guide, or transfer liquid materials more conveniently while maintaining a controlled bottle opening.

For laboratories, chemical packaging suppliers, reagent bottle manufacturers, and distributors in the XXX market, this aluminum foil gasket provides a practical sealing solution for bottles used in testing, sampling, liquid dispensing, and reagent storage. It helps reduce splashing, contamination risk, and uncontrolled liquid flow during transfer. OEM customization is also available for size, material structure, thickness, packaging, and application requirements.

In laboratory environments, reagent bottles are often used for storing, transferring, and dispensing liquid materials. Traditional open-mouth bottle pouring may cause several problems, including liquid leakage, splashing, unstable flow direction, contamination from external particles, and inconvenience when connecting a guide tube or dispensing tube.

For users who need to pour laboratory liquids through a catheter or tube, a normal bottle gasket is usually not enough. If the gasket is too hard, it is difficult to pierce. If it is too soft, it may not provide stable sealing support. If the hole is not controlled, the liquid may leak around the tube.

This creates a strong demand for a thin, ring-shaped, easy-to-pierce aluminum foil gasket that can be installed inside the cap and used together with a guide tube for controlled liquid pouring.

Our Ring Universal Aluminum Foil Gasket is developed to solve this laboratory sealing and liquid-transfer problem. The outer ring supports cap assembly and bottle-mouth sealing, while the central aluminum foil area allows tube insertion for liquid guidance. The 0.5mm thickness keeps the liner thin and flexible, while the aluminum foil layer provides a clean, stable, and practical interface for laboratory applications.

The gasket can be used in reagent bottles, chemical test bottles, liquid sample containers, and laboratory packaging systems. When the user needs to pour liquid, the aluminum foil center can be pierced and fitted with a suitable guide tube. This helps direct liquid flow, reduce accidental spilling, and improve handling efficiency.

For B2B buyers, this product is suitable for bulk procurement, bottle cap assembly, reagent packaging projects, and customized laboratory consumable solutions.

This 19.5mm ring aluminum foil gasket is suitable for a wide range of laboratory and chemical packaging scenarios, especially where liquid control and tube insertion are required.

Typical applications include:

• Laboratory reagent bottle sealing
• Chemical liquid sample bottle closure
• Tube-insertion liquid pouring systems
• Experimental liquid transfer containers
• Laboratory consumable packaging
• Reagent bottle cap assembly
• Small-volume chemical dispensing
• Research and testing laboratories
• OEM bottle and cap manufacturers
• Laboratory supply distributors

In laboratory work, users often need to pour liquid materials from a bottle into another container, test tube, measuring cup, or reaction device. By inserting a guide tube through the aluminum foil center, the operator can control the liquid outlet more effectively. This makes the product especially useful for applications where clean handling, directional pouring, and simple operation are important.

The gasket is placed inside the bottle cap or closure system. When the cap is tightened onto the reagent bottle, the gasket helps form a sealing interface between the cap and the bottle mouth.

When liquid transfer is required, the user can pierce the center aluminum foil area and insert a suitable guide tube or catheter. The tube passes through the aluminum foil section and becomes the liquid outlet path. During pouring, the tube helps guide the liquid direction and reduce random splashing from the bottle mouth.

The ring structure keeps the gasket positioned inside the cap, while the thin 0.5mm aluminum foil section allows convenient puncturing and tube installation. This simple design improves laboratory handling efficiency without requiring a complicated dispensing system.

When selecting a ring universal aluminum foil gasket for laboratory reagent bottles, buyers should consider the following points:

1. Confirm bottle cap size
The gasket outer diameter should match the inner diameter of the bottle cap. This model has an outer diameter of 19.5mm.

2. Confirm tube insertion requirement
The inner diameter and aluminum foil center area should be suitable for the guide tube or catheter used in the laboratory.

3. Confirm thickness requirement
A 0.5mm thickness is suitable for thin, flexible, easy-to-install sealing applications.

4. Confirm liquid type
Different laboratory liquids may require different liner structures. For special chemicals, please provide liquid information for material compatibility evaluation.

5. Confirm order quantity and packaging
For distributors, laboratory bottle manufacturers, and reagent packaging suppliers, bulk packaging can reduce cost and improve production efficiency.

6. Request samples before mass order
For new bottle or cap projects, sample testing is recommended to confirm sealing performance, puncture performance, and tube fitting performance.

We support customized aluminum foil gasket solutions for laboratory, chemical, food, daily chemical, and industrial packaging applications. With flexible production capability, stable dimensional control, and OEM customization service, we can help customers develop sealing liners that match their bottle caps, filling process, and end-use requirements.

For buyers in the XXX market, we can provide sample testing, customized specifications, bulk supply, and export packaging support. Whether you are a laboratory consumables distributor, reagent bottle manufacturer, or chemical packaging supplier, this ring aluminum foil gasket can be adapted to your sealing and liquid-transfer application.

It is mainly used for laboratory reagent bottle sealing. The central aluminum foil area can be pierced for inserting a guide tube or catheter, allowing controlled liquid pouring or transfer.

The standard size is 19.5mm outer diameter, 12.5mm inner diameter, and 0.5mm thickness.

Yes. We can customize the outer diameter, inner diameter, thickness, material structure, and packaging according to your bottle cap and application requirements.

It can be used for many laboratory liquid packaging applications, but chemical compatibility depends on the actual liquid formula. For strong acids, solvents, oxidizers, or special reagents, sample testing is recommended.

Yes. Samples can be provided for bottle cap fitting, sealing test, puncture test, and tube insertion test before mass production.