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Are the containers leak-proof?

Our containers close very well thanks to precise tooling and carefully designed construction. However, due to the use of slightly softer materials and the production technology, minor variations in tightness cannot be completely ruled out.

Please ensure that the snap edges are completely dry when fitting the lid. If any liquid gets between the lid and the rim, a so-called bridge may form, allowing the product to leak.

Oils and oily marinades are particularly critical, as even the smallest amounts can lead to leakage. Oil also tends to creep into fine gaps, which can further impair tightness. Therefore, applications with such filling goods are at the filler’s own risk.

If you require a completely liquid-tight solution, an additional (film) sealing process is essential. In all cases, we recommend conducting sufficient tests throughout the entire process chain to verify the suitability of the packaging.

Please also note that our standard containers are not gas-tight and are therefore not suitable for packaging under modified atmosphere.

Leak-Tightness of Plastic Containers – Factors and Test Methods

Criterion Description Note / Recommendation
Standard leak test Containers are filled with water, stored on their side and observed for leakage over a defined period. Procedure varies by manufacturer (e.g., test duration, temperature, fill level). No EU-wide standard.
Material influence Softer polypropylene grades may slightly deform under pressure or temperature. Minor tolerances are technically inherent and do not indicate a defect.
Lid application Moisture or product residue on snap edges can prevent proper lid seating. Keep all sealing edges completely dry before closing.
Filling product properties Oils, fats and marinades can creep into microscopic gaps and dissolve sealing films. Use with critical contents cautiously – application at the filler’s own risk.
Additional sealing If required, a film or induction seal can be used to achieve near-absolute tightness. Recommended for liquid, sensitive or high-value products.
Gas tightness Standard containers are not gas-tight and not suitable for modified-atmosphere packaging. Special solutions are required for MAP applications.

Practical recommendation

Test the packaging across your entire process chain (filling, transport, storage, temperature). Only then can suitability for your specific product be reliably assessed.

Status: 2025 · Source: Bikapack Production & Customer Service · All information without guarantee.