A vial is only as good as its seal. Stoppers, seals and crimping tools have to match each other and the vial neck, and the crimp has to be consistent.
Stoppers
Butyl rubber stoppers are the standard for injectable vials. Match the stopper to the vial neck (commonly 13 mm or 20 mm) and choose serum-style or lyophilization-style stoppers according to your process.
Seals
- Aluminum seals crimp over the stopper and vial neck.
- Flip-off seals add a plastic cap that's removed before first use. Colors help tell products or strengths apart.
- Tear-off seals are another option.
Crimpers and decappers
- Hand crimpers suit low volumes. Choose one sized to your seal.
- Bench or electronic crimpers give more consistent crimps at higher volumes and reduce hand strain.
- Decappers remove seals for rework or disposal.
Quality checks
Check crimps for a smooth, even finish with no wrinkles, and make sure the seal doesn't spin. Inspect sample vials from each batch, and replace crimper jaws when crimps start to vary.
Choosing a crimper
Match the crimper to your seal size and type. If you run several seal sizes, interchangeable jaws save buying multiple tools. For volume work, bench and electronic crimpers give consistent results with less fatigue, which reduces rework.
Questions to ask your supplier
- Do the stoppers, seals and crimper jaws match our vial neck?
- Which stopper style suits our process?
- Which seal colors are available?
- Are replacement jaws available?
Frequently asked questions
How do I know a crimp is good?
A good crimp is smooth and even, without wrinkles, and the seal shouldn't rotate. Inspect a sample from each batch.
Do I need a bench crimper?
For higher volumes, a bench crimper gives more consistent results and is easier on staff. Hand crimpers work for small runs.
Do you supply matching components?
Yes. We quote vials, stoppers, seals and the right crimper together so everything fits.
Can one crimper handle different seal sizes?
Some crimpers accept interchangeable jaws for different sizes. Ask us which model fits your mix.
Ready to price vial seals and crimpers?
Send us what you need and we'll reply with one quote, usually within a business day.
This guide is general product and purchasing information for licensed healthcare businesses. It isn't medical, legal or regulatory advice. Follow your medical director's protocols and the manufacturer's instructions.