We have the optimal closure lining solution for your product


A single leak can sink a whole shipment. That’s why its almost impossible to overstate the importance of getting exactly the right sealing solution. We have a large tooling library, and can line caps of different shapes and sizes, from 9mm to 120mm. We can also cut bespoke liners for hand application into caps or pre-cut liner equipment.

Induction Sealing

Induction sealing is used to protect products in plastic or glass containers from external elements like moisture and oxygen. The thermoplastic bond creates a hermetic seal that prevents leaks, seals in freshness, and provides tamper evidence. Wadding Solutions induction seal liners are used in pharmaceutical products, tablets, protein powder, milk, sauces, juice, herbs and spices, cosmetic creams, liquid plant food, and chemicals.

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Cap-less Sealing

Capless sealing is a great way to achieve a hermetic seal if the cap is not compatible with inline sealing machinery – for example an aluminium lid on a glass jar. A specially designed electromagnetic coil applies pressure & heat to the induction seal, completing the process.

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Reseal liners

A foam re-seal liner protects non-single use products after they’re opened and their foil seal has been removed. The re-seal liner creates a gasket seal around the rim of the container when a cap is screwed back on. It also helps to keep the contents fresh and stops leaks during transport. Wadding Solutions re-seal liners are used in cosmetic creams and other beauty products, protein powders, vitamin C tablets, nutraceutical products, and pharmaceutical products.

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BEVERAGE

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Pressure Sealing

Pressure seal liners have a torque activated adhesive which bonds to the container as the cap is screwed on. Pressure sealing is often used when induction sealing equipment is not available, or if the product is dry and does not require an FDA approved tamper evident seal. Wadding Solutions pressure seals are best used with dry products, but can bond to plastics and glass, giving them a degree of tamper protection.

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BEVERAGE

Tamper evident sealing

A tamper indicating seal is a foil barrier that must be pierced or forcibly removed, and leaves a visible witness on the rim of the container. When consumers see an intact seal they can be confident that their purchase has not been tampered with. A tamper evident seal combined with a tamper evident band on the neck of the vessel provides an even greater degree of confidence. A combination of two or more Wadding Solutions tamper evident sealing methods is commonly used by exporters to maximise protection from tampering.

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BEVERAGE

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conduction sealing

Conduction sealing is used to seal a container that doesn’t have a cap. A heated probe applies pressure to the seal, which transfers heat directly onto the rim of the container. After a long dwell time the adhesive sets the seal.

Conduction sealing is normally part of the filling process, and is mainly used for yogurt and other refrigerated FMCG items.

FOOD

BEVERAGE

Glass sealing


Experience tells us that sealing wet products in glass takes care and exactly the right sealing method. We have multiple options that we know will work for different applications, including induction and pressure seals. We’ll work with you to design, test, and implement the best solution.

Venting Liners

Some products permeate gas after they’ve been packaged. A venting seal allows the gas to escape through a special membrane and then out – either through a hole in the cap or the threads on the inside of the cap. Wadding Solutions have different types of venting liners, which we can test to make sure that you get the optimal solution for your packaging.

VETINARY

NUTRACEUTICAL

PHARMACEUTICAL

AGRICHEMICAL

Sealing materials


This is a fascinating subject that’s constantly evolving as new technology emerges. We love researching new sealing materials, and we’re happy to test and trial any new material you might be interested in. It’s also important to know that different materials suit different packaging types. For example, some foil induction liners are ideal for PE but wont work on glass. We have the experience to know what works and what doesn’t – and that saves you time and money.

To make sure we can reliably complete orders quickly, we maintain high stock levels – our normal lead time is just 2 weeks from the date the caps arrive with us. Ask anyone – that is quick. But if you need something that’s not already on hand, it’s no problem.

We have a network of suppliers throughout the world, so we can source a range of materials to seal onto HDPE, PET and glass. Just let us know what you need and we’ll do the rest.

Frequently asked questions

Possible Causes:
  • Wrong sealing face on liner for that type of container
  • Removing closure too soon after induction sealing
  • Too low power setting for line speed
  • Induction sealing equipment is not suitable
  • Not enough torque
  • Induction sealing head alignment not parallel, centered and level to closure
  • Land area contaminated with product
  • Land area not level
  • Cap is not compatible – contact us for alternative solution
  • Liner too thick or rigid for closure to apply consistent pressure on the land area.
  • Closure is too large for neck of container
  • Land area not level
  • Inconsistency in required on torque
  • Closure not designed to accommodate the overhang of liner

The sealing head design is based on the point where the foil liner is placed in relation to the top of the closure. The distance which the magnetic field can produce through air is very limited. Ideally, the foil disc should be approximately 3mm away from the bottom of the sealing head. This area provides the maximum field strength. A tunnel head is the best option for sealing a closure i.e. a spout cap or flip top.

Key Benefits of Induction Sealing:

  • Tamper proof barrier showing the client the contents of this product have not been compromised
  • Oxygen and moisture barrier – induction seals are often referred to as freshness seals
  • Eliminate Leaks
  • Professional Finish
  • Pressure sensitive sealing is more visual than practical
C O N T A C T

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