Leakage in transit
Bottles that pass QC but weep after weeks of vibration and altitude changes on the road or at sea.
Our fix: structure matched to your bottle-mouth flatness, cap type and torque — verified on your line before volume production.
Induction Seal Liners · Closure Gaskets · Custom Structures
Sealing solutions engineered for your container, your product and your line.
We manufacture custom induction seal liners and closure gaskets matched to your bottle mouth, your cap and your filling process — so products stay protected from the filling line to the customer's hands.
Free samples, courier collect
7-day typical lead time
Shipping worldwide from Shanghai
9–182mm
standard diameter range,
die-cut to any shape
die-cut to any shape
30 yrs
Manufacturing sealing liners since 1996
100+
Liner structures developed for real production lines
1,000+
Customers served across packaging & filling industries
5 regions
Asia · Americas · Oceania · Middle East · Africa
Beyond the liner price
Packaging problems we solve — not gaskets we sell
A liner is the last barrier between your product and the outside world. We engineer it around what actually goes wrong in the field.
Permeation & oxidation
Aromas fade, actives degrade, oils go rancid long before the printed expiry date.
Our fix: high-barrier structures (AL / EVOH) with verified retention for aroma-, oxygen- and moisture-sensitive fills.
Contamination & moisture
Pharma and food fills need seals produced under controlled hygiene, not on an open workshop floor.
Our fix: Class-100,000 cleanroom production, in-house physics & microbiology lab, GMP-aligned process control.
Aggressive formulations
Pesticides, fertilisers, solvents and additive-rich lubricants attack ordinary liners until they fail.
Our fix: solvent-resistant and high-barrier liners proven against real agrochemical and lubricant recipes.
Filling-line downtime
A liner that misses your induction machine's power curve means rejected bottles and stopped lines.
Our fix: seal layer matched to your capper and induction head — pilot trials on your equipment, first-article approved.
Inconsistent batches
Each new shipment seals differently, and complaints start arriving from your customers.
Our fix: locked formulations, raw-material lot traceability and full inspection before dispatch — batch after batch.
Product families
Four liner families, one engineering standard
Organised the way buyers actually specify: by sealing technology. Every family is fully customisable in diameter, thickness, layer build-up and branding.
Induction Seal Liners
Aluminium-foil liners heat-sealed to the container mouth by induction. Two-piece and one-piece types for PE, PET, PP, PS, PVC, glass and COEX containers — including easy-peel and high-barrier grades.
PE / PET / PP / PSGlass (hot-melt)High-barrier EVOHEasy-peel0.2–1.7 mm
Explore induction liners →
Pressure-Sensitive Liners
One-piece PS-foam liners with activation adhesive. They bond under cap torque alone — no induction machine, no heat — ideal for dry goods, powders and glass jars, and reusable after opening.
PS22 / CP200.25–2.5 mmGlass & plasticSolids & powders
Explore pressure-sensitive liners →
Foam & Closure Liners
EPE, EVA and LDPE foam liners and gaskets that seal by elasticity under the cap. Clean, dust-proof, moisture-stable and reusable — with optional foil lamination for a stronger seal.
EPE 0.5–3 mmEVA 1–4 mmLDPE coatedWashers & die-cuts
Explore foam liners →
Vented & Functional Liners
Membrane vents that equalise pressure so agrochemical and fertiliser bottles don't bulge, burst or leak — plus embossed-logo, printed and tabbed liners for brand protection and anti-counterfeiting.
Vented membraneLogo printingSteel-stamp embossingPull-tab
Explore vented & branded liners →
How we work
From your bottle to a stable seal in five steps
Because every container, cap and filling line is different, we never quote blind — we match first.
Send your specs
Bottle mouth drawing, cap type, contents and your sealing equipment — a photo of the bottle mouth works too.
Structure proposal
Our engineers reply within 48 hours with a proposed layer build-up, thickness and material datasheet.
Free samples
Sample liners in your diameter, free of charge — you only cover the courier.
Trial on your line
Seal on your own induction machine. We tune the structure until first-article inspection passes.
Volume supply
Locked formulation, lot traceability and 7-day typical lead time — shipment from Shanghai.
Free samples
48-hour engineering response
MOQ discussed per project
Port of Shanghai, 40 km from the plant
Markets we serve
Seals proven in demanding fills
From GMP-aligned pharmaceutical packaging to solvent-heavy agrochemicals — the structure changes, the reliability doesn't.
Pharmaceuticals
Food & Beverage
Agrochemicals
Lubricants
Personal Care
Household Chemicals
Inside the factory
Take the factory tour
A real manufacturing base in Shanghai — not a trading office
Everything that touches your liners happens under our own roof: compounding, coating, die-cutting, cleanroom assembly and laboratory inspection. Our process follows GMP practices originally built for pharmaceutical packaging materials.
8,000 m²
Production site
1,000 m²
Class-100,000 cleanroom
150 m²
Physics & microbiology lab
100+
Skilled workers, avg. 10+ yrs experience
Buyer questions
Frequently asked, straight answers
What do you need from me to recommend a liner structure?+
Three things: (1) the container — material (PE, PET, PP, glass…) and a photo or drawing of the bottle mouth; (2) the cap — type and whether the liner must stay in the cap after opening; (3) the contents — especially if they contain solvents, acids or oils. If you can share your induction sealer model, we'll also match the sealing curve. With that, our engineers will come back with a structure proposal within 48 hours.
Do you provide free samples?+
Yes. We make sample liners in your diameter free of charge for structure validation and line trials — you only cover the courier cost. For production trials we can supply small paid batches before you commit to volume.
What are your MOQ and lead times?+
MOQ is set per project — it depends on diameter and structure, and we're flexible for first orders while you validate the seal. Typical lead time is 7 days after order confirmation; custom structures with new tooling take a little longer for the first run.
Can you print or emboss our logo on the liner?+
Yes — both. We do surface printing on the sealing layer and steel-stamp embossing (visible on the sealed foil after opening), commonly used on lubricant and agrochemical packs as an anti-counterfeiting feature.
Which container materials can you seal?+
PE, PET, PP, PS, PVC and multi-layer COEX plastics, plus glass with hot-melt structures. Aggressive fills (solvents, pesticide formulations) use our high-barrier grades. The golden rule: the heat-seal layer material must match the container mouth material for a true weld — that's exactly what we configure for you.
Send us your container — get a structure proposal and free samples.
Tell us what you fill, what it goes into, and how you seal it today. Our engineers will come back with a matched structure, a datasheet and sample liners.