Andrej1 Oct 2026
Scent: Plastový vrchnák 28/410, bezpečnostný
Closures DIN28
Plastic safety cap 28/410
The plastic cap 28/410 in a tamper-evident version is a screw closure made of polypropylene (PP) designed for bottles with a 28/410 neck finish. full description
In stock · 308 pcs
OVV28PB4
€0.42incl. VAT
Lowest price in the last 30 days: €0.42
Volume pricing
1–199 pcs€0.42Your price
200–999 pcs€0.38−8 %
1000–4999 pcs€0.36−15 %
from 5000 pcs€0.32−25 %
Total for 1 pcs: €0.42
Product description
The plastic cap 28/410 in a tamper-evident version is a screw closure made of polypropylene (PP) designed for bottles with a 28/410 neck finish. It is used to seal contents that are not dispensed with a pump or spray but poured directly from the bottle. The tamper-evident design provides additional protection against accidental opening.
The cap is primarily used for tonics, hydrolats, micellar waters, shower gels, shampoos, liquid soaps, massage and body oils and for refill packs that are decanted into smaller containers. The material is also suitable for direct food contact, making the cap useful in both cosmetics and the kitchen.
What the tamper-evident cap is suitable for
- Closure for storage and shipping – the solid screw cap has no dispensing opening or moving parts through which contents could leak. It is suitable for stock packaging and refill containers. It can also be used to seal a bottle that will be shipped, with the dispenser fitted by the customer upon arrival.
- Protection against accidental opening – the tamper-evident design is relevant for concentrated raw materials and preparations that should not be opened accidentally. We recommend testing the opening and closing mechanism on an empty bottle before filling.
- Cosmetics and food – the material is suitable for contact with cosmetic products and for direct food contact under normal conditions of use. The declaration of conformity is available on the product page.
- Neutral white colour – does not interfere with the label or the colour of the contents and suits both clear and coloured glass or plastic bottles.
The tamper-evident cap does not replace storing the product out of reach of children. If the finished product is subject to the requirement for a child-resistant closure, compliance with this requirement must be verified for the specific bottle and cap combination.
Compatibility with bottles
The cap fits necks labelled 28/410. The first number indicates the neck diameter in millimetres and the second indicates the thread type. The same diameter with a different thread type, such as 28/400 or 28/415, may not seat or seal correctly. The neck type is listed in the specifications of each bottle.
Bottles with the same neck type and ready-made bottle-and-cap combinations are available in the Handymade range. For custom combinations, we recommend verifying the seal and the behaviour of the packaging with the specific formulation.
Checking the seal is straightforward. Place the filled and closed bottle on its side or upside down on a paper towel for 24 hours. Any leakage shows up most quickly with oils and thin aqueous solutions.
What to keep in mind when filling and using
- Preparation before first use – wash the cap in warm water with a mild cleaning agent, rinse, disinfect with isopropyl alcohol or ethanol and allow to dry completely. Water residues in the thread can impair the microbiological stability of water-based products.
- Filling the bottle – the bottle is filled to the nominal volume, i.e. the volume it is designed for under standard filling conditions. The total brim-full volume is the physical capacity up to the neck. The difference between them provides a reserve for the cap and for expansion of the contents when temperature changes. A bottle filled to the brim may overflow through the thread when capped or when heated.
- Tightening – tighten the cap evenly and with care. An overtightened thread seals worse than a properly tightened one. The bottle neck should be dry and clean before closing, especially when working with oils.
- Compatibility test – with a high proportion of essential oils, fragrance compositions or solvents, we recommend running a test with the specific contents. After a few weeks, check whether the cap has changed shape, colour or sealing performance.
- Recycling – an empty, clean polypropylene cap belongs in sorted plastic waste.
Frequently asked questions
Which bottles does the plastic cap 28/410 fit?
The plastic cap 28/410 fits bottles with a 28/410 neck, meaning a neck diameter of 28 mm and a 410 thread type. The bottle material does not matter – it can be glass or plastic. Necks with the same diameter but a different thread type, such as 28/400, may not seal correctly. The neck type is listed in the specifications of each bottle.
Is the tamper-evident cap 28/410 suitable for food?
Yes, the tamper-evident cap 28/410 is made of polypropylene, which is suitable for direct food contact under normal and foreseeable conditions of use. It can be used to seal bottles containing home-made syrups, oils or herbal infusions, for example. The bottle onto which the cap is fitted must itself also be suitable for food contact.
Does the cap 28/410 seal with oils and thin liquids as well?
With the correct neck type and even tightening, the cap 28/410 seals with both aqueous and oil-based contents. However, the seal depends on the specific bottle, the cleanliness of the neck and the viscosity of the contents, so we recommend verifying it with a test before filling larger quantities. The neck should be dry and free of oil residue when closing, otherwise the cap may not seat correctly.
Can the polypropylene cap withstand essential oils and alcohol?
For common alcohol-based solutions and preparations with a standard proportion of essential oils, the polypropylene cap 28/410 is used without issues. With concentrated essential oils, fragrance compositions and solvents, changes in shape, colour or seal integrity may occur over time. In such cases, we recommend a multi-week compatibility test with the specific contents before filling an entire batch.
Can the tamper-evident cap 28/410 be reused?
Yes, for personal use the tamper-evident cap 28/410 can be reused after washing and disinfecting with isopropyl alcohol or ethanol. Before reuse, check that the thread is undamaged and that the tamper-evident feature still functions. For products intended for sale, we recommend using a new closure every time.
Parameters
- Product color
- White
- Country of origin
- European Union
- Diameter
- 35 mm
- Thread type
- 28/410
- Height
- 24,5 mm