Description
28-400 Black Phenolic Cap with LDPE Polycone Liner
Create a dependable, professional closure for your container with this 28-400 black phenolic cap with an LDPE polycone liner. Designed to fit our compatible 8 oz bottles with a 28-400 neck finish, this durable flat cap is an excellent choice for laboratory, chemical, essential-oil and industrial packaging applications.
Enhanced Protection Against Leaks
The cone-shaped LDPE polycone liner forms a wedge-style seal against the inside of the bottle neck. As the cap is tightened, the liner conforms to the opening to help create a secure fit and provide added protection against leakage, evaporation and product loss.
Polycone-lined caps are especially well suited to glass bottles because the liner seals against the inner neck rather than relying exclusively on the top sealing surface. The closure may also be compatible with certain plastic containers, depending on the bottle design and packaged product.
Durable Phenolic Construction
Phenolic resin—also known as phenol-formaldehyde resin—is a strong thermoset material valued for its dimensional stability, rigidity and resistance to many chemicals. Unlike softer closure materials, phenolic caps are designed to maintain their shape and provide reliable threading during repeated handling.
The combination of a durable phenolic shell and a flexible LDPE cone liner makes this closure a dependable option for products requiring a secure, professional-quality seal.
Features and Benefits
- Standard 28-400 neck finish
- Fits our compatible 8 oz bottles
- Durable black phenolic construction
- Flexible LDPE polycone liner
- Cone-shaped liner seals against the inner bottle neck
- Helps protect against leakage, evaporation and product loss
- Strong, rigid closure with excellent dimensional stability
- Resistant to many chemicals
- Professional black finish
- Recommended primarily for compatible glass bottles
- May also fit certain plastic containers
- Suitable for commercial, laboratory and industrial packaging
Common Applications
These 28-400 polycone-lined phenolic caps are commonly selected for packaging:
- Essential oils and fragrance oils
- Laboratory solutions and reagents
- Chemicals and solvents
- Cosmetic and personal-care ingredients
- Industrial liquids
- Specialty oils
- Research and testing materials
Compatibility Information
This cap is designed for bottles with a 28-400 continuous-thread neck finish.
Customers should test the complete bottle, cap, liner and contents under actual filling, storage, transportation and temperature conditions before commercial use. Chemical resistance and sealing performance vary according to the formulation, concentration, temperature and length of exposure.
Choose CanadianMedHealthSupplies 28-400 black phenolic caps with LDPE polycone liners for durable construction, a clean professional appearance and enhanced protection for compatible glass bottles.
COVID-19 prevention policy
Shipping
Payment & Security
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

