FlipTop®
Tear Down Vial Seals

USES

Our FlipTop® Tear Down seals, available in sizes 13 and 20 mm, are designed for specific applications, such as oral vaccinations.

CONSTRUCTION

These seals are characterized by the riveting of the PP Disc and the Aluminium seals, featuring a bridge-type design.

OPENING

The FlipTop® Tear Down range of seals are flipped open and torn down along the side groove to access the injectable medicine.

CUSTOMIZATION

Printing on the aluminium surface, glossy and matte finishes on the PP disc, as well as printing and emboss on the PP disc (all Pantone shades)

SPECIFICATIONS

Download the spec sheet.

We have standard designs for you to get started with a minimal lead time. We are quick to turnaround with customization as per your specific requirements.

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READY-TO-ORDER

Sizes

Our FlipTop® Tear Down seals, are readily available in sizes 13 and 20 mm.

CUSTOMIZABLE

Finishes

The plastic discs of our seals come in a variety of finishes: GLOSSY, MATTE, EMBOSSED and PRINTED.

END-USE OPTIONS

Delivery

We deliver READY TO USE and READY TO STERILIZE packaging options as per your requirement.

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We supply to more than 150 of the leading pharmaceutical companies across the world. Choose us for your next requirement.

Autofits manufactures the full range of pharmaceutical vial closures: FlipTop® aluminium-plastic seals (flip-off, pull-ring and tear-down), all-aluminium tear-off and tear-down seals, and aluminium pilfer-proof (ROPP) caps. Every closure crimps over the rubber stopper to form the sterile barrier; the families differ in construction, how the user opens them, and which neck sizes they cover.

This page is the top-level map of the Autofits product range. Use the matrix below to compare the families at a glance, then follow the links into each family or size page for dimensions and ordering detail.

Key takeaways

Autofits builds three closure constructions: aluminium-plastic combination seals (the FlipTop® family), all-aluminium seals (tear-off and tear-down), and aluminium pilfer-proof (ROPP) caps.
The FlipTop® family covers three opening actions: flip-off (Optima), full removal by pull ring, and twist-off (Tear-Down).
All-aluminium seals suit applications that want a metal-only closure with no moulded plastic top.
Pilfer-proof (ROPP) caps are aluminium screw caps with a tamper-evident band, used on threaded bottles and vials.
Sizes run 13, 20, 28, 32 and 34 mm depending on the family; browse the size hub to match a closure to your vial neck finish.
All closures are produced in a 75,000 sq ft Nashik facility with an ISO Class 8 cleanroom and 100% high-speed camera inspection, under ISO 9001, ISO 14001 and ISO 15378 certification, with a Drug Master File and CFDA registration.

Overview of the range

A vial seal does one job above all: it holds the rubber stopper compressed against the glass neck so the vial stays sterile until first use. Every Autofits closure does this by crimping or rolling aluminium under the vial neck flange. What changes from family to family is the top of the closure and the way the user gets in.

The FlipTop® range is an aluminium-plastics combination: an aluminium shell crimps over the stopper, and a polypropylene (PP) disc or button sits on top. The plastic top gives the user a clean opening action and a surface for colour-coding and printing. Within this range, the Optima design flips a button off to expose the injection point, the Pull-Ring design lets the whole seal come away once the disc is detached, and the Tear-Down design twists off anticlockwise so the seal lifts clear; the latter is used mainly for oral vaccinations.

The all-aluminium range drops the plastic top entirely. Tear-off seals are torn open by removing the metal top, exposing the stopper; tear-down seals in all-aluminium form tear down a section of the seal. These suit a metal-only specification.

Pilfer-proof (ROPP) caps are a different format: aluminium screw caps that are threaded onto the bottle or vial during capping, with a tamper-evident band that separates when the cap is first unscrewed.

Product matrix

Product family	Construction	How it opens	Sizes available	Typical use
FlipTop® Optima	Aluminium shell + PP button disc (combination)	Flip the plastic button up to expose the injection point	13, 20, 28, 32, 34 mm	Routine injectables; colour-coding and printing
FlipTop® Pull Ring	Aluminium shell + PP disc with pull ring (combination)	Pull the ring and open anticlockwise; the whole seal detaches	20 mm (bridge), 32 mm (flower)	Full-seal removal; often marked for oral use
FlipTop® Tear-Down	Aluminium shell + PP disc riveted to alu (combination)	Twist the disc anticlockwise to tear the seal down and off	13, 20, 32 mm	Mainly oral vaccinations
Tear-off seals	All-aluminium, no plastic	Tear the metal top away to expose the stopper	13, 20, 32 mm	Metal-only closure; fuller stopper exposure
Tear-down seals	All-aluminium, no plastic	Tear a section of the seal down	20 mm (others on request)	Metal-only closure
Pilfer-proof (ROPP) caps	Aluminium screw cap with tamper band	Unscrew; the tamper band separates on first opening	Available on request	Threaded bottles and vials; tamper evidence

Construction at a glance

The two main constructions differ in one decision: whether there is a plastic top.

Aluminium-plastics combination (FlipTop®): an aluminium seal carries a PP disc or button. This is the construction covered by ISO 8362-6 for aluminium-plastics combination caps. It gives the cleanest opening action and the best surface for colour and print.
All-aluminium: a one-piece aluminium seal with no plastic, opened by tearing the metal. These relate to ISO 8362-3, which covers aluminium caps for injection vials.

All of the seals crimp over a rubber stopper seated in a vial whose neck finish follows ISO 8362-1. Match the seal size to the vial neck finish, not to the vial's nominal volume.

Quality and standards

Every closure on this page is built to the same quality system. Autofits operates under ISO 9001:2015, ISO 14001:2015 and ISO 15378:2017 (GMP for primary packaging materials), holds a Drug Master File (DMF 18100) and a CFDA registration (B20200000501), and follows ISO 15378:2017 and ISO 8362-6 for the combination seals.

Aluminium is alloy AA8011 with an epoxy lacquer coating (conforming to 21 CFR 175.300); PP discs are moulded in-house on Japanese Toyo injection machines. Materials are REACH and RoHS compliant and BSE/TSE-free. Inspection is 100% high-speed camera, with AQL set at critical = nil, major NMT 2.5%, minor NMT 4% (tailorable). Seals are available Regular, Ready-to-Use (RTU, gamma or ETO sterilised) or Ready-to-Sterilise (RTS). See the quality page for the full certification set.

Frequently asked questions

What types of vial closures does Autofits make?

Autofits makes three constructions. The FlipTop® family is an aluminium-plastics combination, offered as flip-off (Optima), pull-ring and tear-down designs. The all-aluminium family includes tear-off and tear-down seals with no plastic top. Separately, Autofits makes aluminium pilfer-proof (ROPP) screw caps with a tamper-evident band.

What is the difference between a flip-off seal and a tear-off seal?

A flip-off seal (the FlipTop® Optima) is an aluminium-plastics combination: you flip a plastic button up to expose a small injection point while the aluminium stays crimped. A tear-off seal is all aluminium with no plastic top; you tear the metal away to expose the stopper. Both crimp over the stopper to seal the vial.

Which vial sizes are available?

Across the range, closures are made in 13, 20, 28, 32 and 34 mm, depending on the family. There is no 30 mm size. The size hub shows which products are offered in each size with key dimensions.

Are the seals supplied sterile?

They can be. Closures are available Regular, Ready-to-Use (RTU) or Ready-to-Sterilise (RTS). RTU seals are assembled in the ISO Class 8 cleanroom, washed, double-bagged and gamma or ETO sterilised for aseptic-area use.

Do the closures provide tamper evidence?

Yes, by design across the range. The combination seals make tampering visible once the button, ring or disc is disturbed (the Optima Button design has intrinsic tamper evidence), all-aluminium seals show torn metal once opened, and pilfer-proof caps have a band that separates on first unscrewing.

Sources

ISO: ISO 8362-1, Injection containers and accessories, Part 1: Injection vials made of glass tubing (https://www.iso.org/)
ISO: ISO 8362-6, Injection containers and accessories, Part 6: Caps made of aluminium-plastics combinations for injection vials (https://www.iso.org/)
ISO: ISO 15378, Primary packaging materials for medicinal products, GMP requirements (https://www.iso.org/standard/70794.html)
Autofits product master spec data (engineering drawings and FlipTop Seals dossier)

*Last updated: 2026-06-26. This page is general technical information, not regulatory or compliance advice; confirm current standard editions and requirements with the issuing bodies.*

FlipTop® Tear Down ​ Vial Seals