18DIN neck, Phenolic Cap with LDPE Polycone Liner

18DIN Black Phenolic Cap with LDPE Polycone Liner Create a dependable, professional closure for your container with this 18-400 black phenolic cap with an LDPE polycone liner. Designed to fit our compatible 5ml to 100ml bottles with a 18-400 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 18-400 neck finish Fits our compatible 5mL to 100mL 18DIN 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 18DIN 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 18-400 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 18DIN black phenolic caps with LDPE polycone liners for durable construction, a clean professional appearance and enhanced protection for compatible glass bottles.