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Ensure the integrity and longevity of your liquids with the MEETOOT 12-Pack Phenolic Resin Poly Seal Screw Caps. Designed for professional and domestic use, these 28mm black caps provide a superior seal for a variety of glass bottles, including Boston round bottles commonly used for storing essential oils, chemical reagents, perfumes, and pharmaceutical products.
Crafted from high-quality, corrosion-resistant Phenolic Resin (Bakelite), these caps are built to withstand acid and alkali exposure, making them ideal for storing volatile or corrosive substances. The internal conical LDPE plug acts as a reliable poly-seal liner, preventing leaks, evaporation, and contamination. The textured, serrated edge design ensures a non-slip grip, allowing you to tighten the seal securely and effortlessly by hand. Whether you are running a laboratory, a DIY cosmetics business, or simply organizing your home essentials, these durable caps offer the chemical resistance and sealing performance you need.