Tear Off Seal Cap
The tear off seal cap made by aluminum and plastic,
main size is 13mm, 20mm, 32mm
- Fast Delievery
- Quality Assurance
- 24/7 Customer Service
Full Customization
Description
Tamper-proof tear-off aluminum caps · evidence of opening · security features
Tear OffSeal Cap
Tamper-Proof Aluminum Cap · Destructive Opening · Security Features Comparison
Pure aluminum / aluminum-plastic composite · irreversible tear · pharmaceutical & peptide vial use
| Pure AL | Irreversible | Evidence | Tamper | 13 / 20mm | Any colour |
| or composite | tear action | of opening | evident seal | standard sizes | custom print |
|
Pure AL or composite |
Irreversible tear seal |
Evidence of opening |
Tamper evident |
13 / 20mm standard sizes |
Custom colour print |
Destructive opening - tamper evidence by design
The defining anti-counterfeit property of a tear-off seal cap is that opening the vial requires physically destroying part of the cap. There is no way to remove a tear-off cap and reapply it without visible, permanent evidence of the action. This destructive-only opening mechanism is what makes the format suitable for pharmaceutical and peptide products where proof of an unbroken supply chain matters.
Intact - sealed at the factory
Continuous skirt · no perforation visible
The aluminum skirt forms a continuous, unbroken ring around the vial neck and crimp area. No gaps, no pre-existing splits. A buyer can visually confirm the product has never been opened by checking the skirt is fully intact.
Tearing-visible deformation begins
Pull-tab action · permanent metal deformation
Opening requires pulling the tab, which tears the aluminum along a designed weak line. This is a one-way physical action - the metal deforms and separates. There is no force or technique that reverses this deformation back to a smooth, unbroken state.
removed - permanent evidence remains
Crimp ring stays on vial · cannot be reattached
A portion of the aluminum (the crimp ring) remains permanently attached to the vial neck after opening, showing a jagged torn edge. This ring cannot be removed without leaving further visible damage, and a torn cap cannot be reshaped and recrimped to look factory-sealed again.
Why "evidence of opening" matters more than a hologram or label
A counterfeit hologram sticker or printed label can be replicated with sufficient effort and budget. A torn aluminum skirt cannot be undone - the physical deformation of the metal is the security feature, not an applied graphic. This is why pharmacopoeia tamper-evidence guidance (e.g. USP <671> general packaging integrity principles) treats destructive-opening seals as a structurally distinct category from printed or adhesive tamper indicators.
Tear-off vs other cap closures - security features compared
Not all vial cap closures provide the same level of tamper evidence. The table below compares the tear-off seal cap against flip-off caps, screw caps, and plain crimp caps across the security properties that matter for pharmaceutical and peptide packaging.
| Security feature | Tear-off seal cap | Flip-off cap | Screw cap | Plain crimp cap |
|---|---|---|---|---|
| Destructive-only opening | ✓ | ✓ | ✗ | ✗ |
| Visible damage after opening | ✓ severe | partial | ✗ | tool marks only |
| Permanent ring remains on vial | ✓ | ✓ | ✗ | ✗ removable intact |
| Can be reapplied to look sealed | ✗ impossible | ✗ impossible | ✓ resealable - risk | possible with re-crimp tool |
| Tool-free opening | ✓ pull-tab | ✓ flip lever | ✓ twist | ✗ requires de-capper tool |
| Re-closable for multi-dose use | ✗ single-use seal | ✗ single-use seal | ✓ resealable | ✗ single-use |
| Suited to single-dose vials | ✓ ideal | ✓ ideal | not typical | ✓ common |
| Visual stack-on-shelf identification | ✓ colour-coded | ✓ colour-coded | limited | limited |
Tear-off vs flip-off - when to choose each
Both tear-off and flip-off caps provide destructive-only opening with permanent evidence - the key difference is opening mechanics. Flip-off uses a hinged lever action (one motion, common on multi-dose vaccine and injectable vials). Tear-off uses a pull-tab tearing action along a perforation line, often preferred where a fully separable cap (rather than a hinged flap left attached) gives a cleaner final appearance, or where the closure design needs to accommodate a specific crimping equipment setup already in use on the filling line.
Pure aluminum or aluminum-plastic composite - which to specify
The tear-off seal cap is manufactured in two material constructions - pure aluminum, and aluminum-plastic composite. Both provide identical tamper-evident tear mechanics; the difference lies in cost, finish flexibility, and barrier performance.
pure aluminum cap
100% aluminum alloy · standard pharma spec
A single-material aluminum cap, typically 0.18–0.20mm thick aluminum alloy sheet, formed and lacquered for product contact safety. This is the standard pharmaceutical specification - widely accepted across regulatory markets, well understood by fill-finish lines, and the lowest-cost option for high-volume production. The full metal structure provides consistent tear performance and a uniform metallic finish.
✓ Lowest cost at volume - standard spec
✓ Uniform metallic finish - premium look
✓ Widely compatible with existing crimping equipment
✗ Metallic colour finish only (unless printed)
aluminum-plastic composite cap
Aluminum skirt + plastic top disc
A composite construction combining an aluminum tear skirt (providing the tamper-evident mechanics) with a moulded plastic top disc (providing colour, branding surface, and sometimes an integrated rubber-free elastomer seal). This construction allows full custom colour matching without a separate lacquer/print step on the metal, and can integrate a smoother top surface finish for branding.
✓ Full custom colour - moulded-in, not printed
✓ Smooth branding surface on plastic top
✓ Same destructive tear mechanics on aluminum skirt
✗ Slightly higher unit cost than pure aluminum
Both constructions provide identical tamper evidence
The destructive tear mechanism - the security feature - is provided by the aluminum component in both cap types. A composite cap is not a lower-security option; it is a cosmetic and cost-structure variant of the same tamper-evident principle. Material choice should be driven by colour/branding requirements and unit economics, not by security concerns.
pink color flip-off cap flip-off seal 13mm pharma use peptides vial cap
lab use cap, pharma use cap, flip-off cap seal, flip-off top, pink flip-off cap, 13mm pink cap, peptides cap, 2ml vial cap
1. 13mm flip-off cap in pink color, with FLIP-OFF words embossed on the surface.
2. pharma use, lab use cap can seal 2ml injection bottle with 13mm butyl stopper.
3. we also supply glass vials, stopper and boxes, labels for whole set as clients need.
What makes a tear-off cap tamper-proof - three structural elements
Tamper-proof performance comes from three specific structural elements working together - the weak-line perforation, the crimp ring retention geometry, and the pull-tab leverage design.
perforation
Designed weak-line tear path
Controlled tear · consistent break
A pre-formed weakness (thinned metal section or micro-perforation line) runs around the skirt at the design separation point. This ensures the cap tears along a predictable, consistent line every time - rather than tearing randomly, which could in theory allow a partial-opening exploit. Consistent tear geometry is verified during production quality control.
crimp ring
Retained ring geometry
Stays on vial neck · cannot be removed clean
The lower portion of the cap (the crimp ring) is mechanically formed under the vial's neck flange during crimping - a permanent mechanical interlock, not an adhesive bond. This ring physically cannot slide back off the vial neck once crimped, regardless of whether the top portion has been torn away. It remains as permanent, undeniable evidence.
pull-tab
Leverage-engineered tab design
Single motion · no tool required
The pull-tab geometry is engineered to concentrate tearing force exactly at the perforation line when pulled at the designed angle - giving a clean, tool-free single-motion opening for the legitimate end user, while still requiring destructive force that cannot be applied "gently" or reversed.
Tear off seal cap - full specification reference
Reference specifications for the tamper-proof tear-off aluminum seal cap, including both material constructions.
| Parameter | Pure aluminum | Aluminum-plastic composite |
|---|---|---|
| Security mechanics | ||
| Opening type | Destructive tear - irreversible | Destructive tear - irreversible |
| Evidence remaining | Permanent crimp ring on vial | Permanent crimp ring on vial |
| Resealable | No - single-use seal | No - single-use seal |
| Material | ||
| Skirt material | 100% aluminum alloy | Aluminum alloy (skirt only) |
| Top material | Aluminum (same as skirt) | Moulded plastic disc |
| Thickness | 0.18–0.20mm typical | 0.18–0.20mm aluminum + plastic disc |
| Lacquer / coating | Product-contact-safe lacquer | N/A on plastic top; lacquer on skirt |
| Sizing & compatibility | ||
| Standard sizes | 13mm · 20mm · 32mm | 13mm · 20mm · 32mm |
| Vial compatibility | 2ml · 10ml · 20ml standard vials | 2ml · 10ml · 20ml standard vials |
| Crimping equipment | Standard hand or auto crimper | Standard hand or auto crimper |
| Customisation | ||
| Colour | Printed / lacquer tint | Moulded-in colour - full custom |
| Branding | Embossed or printed logo | Embossed plastic top - sharper detail |
| Minimum order | Confirm at enquiry | Confirm at enquiry |
Tear-off seal caps - across the pharmaceutical & peptide supply chain
The tamper-proof tear-off seal cap is specified wherever evidence of opening is a required or preferred security feature for injectable vial products.
peptide manufacturers
Injectable · single-dose · anti-counterfeit
Peptide producers filling single-dose vials - using tear-off caps as the primary anti-counterfeit evidence layer, often combined with hologram stickers and metal-stamp labels for a multi-layer security presentation.
compounding pharmacies
Custom Rx · tamper-evident dispense
Compounding pharmacies sealing custom injectable preparations - requiring a visible, low-cost tamper-evidence layer that patients and dispensing staff can confirm visually before use.
aesthetic clinics
Branded · patient-facing · trust signal
Aesthetic medicine clinics dispensing injectable products under their own brand - using custom-colour composite tear-off caps as both a security feature and a visual brand differentiator at the point of patient consultation.
CDMOs & fill-finish
Multi-client · standardised closure
Contract fill-finish organisations standardising on tear-off closures across multiple client products - taking advantage of compatibility with existing crimping line equipment and consistent tamper-evidence performance across product lines.
biotech & clinical supply
IMP · trial integrity · chain of custody
Biotech clinical supply teams packaging investigational products - where physical evidence of an unbroken seal supports the chain-of-custody documentation required for clinical trial product integrity.
packaging distributors
B2B · full closure range · custom colour
Pharmaceutical packaging distributors stocking both pure aluminum and composite tear-off caps across multiple colours and sizes - serving downstream producers who need fast turnaround on standard closures.
|
Tear-off Opening type Destructive only |
Evidence ★ Of opening Permanent ring |
Pure Al Material or composite |
13/20/32mm Sizes Standard range |
Custom Colour Print or mould |
Tamper Evident Single-use seal |
Tear It. See It.
Tamper-proof by destruction, not by design intent alone.
Request a free sample of the tear-off seal cap in pure aluminum or aluminum-plastic composite - any standard colour or custom colour match. We confirm cap-to-vial fit and crimping compatibility within 48 hours.
Hot Tags: tear off seal cap, China tear off seal cap manufacturers, suppliers, Light Blue Pharmaceutical Matte Flip Off Cap Vial Seals, Flip Off Cap for Injection Vial, 32mm Flip Off Caps Seals, 20mm Flip Off Seal Blank Cap, Flip Off Cap
Send Inquiry
You Might Also Like
