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List of Caps & Tops

Cap Black Phenolic Polycone Liner

Cap Black Phenolic Polycone Liner

2oz (18-400) Black 
Price: $0.35
4oz (20-400) Black 
Price: $0.45
8oz / 16oz /32oz (28-400) Black 
Price: $0.55
Total: $0.00
Price: $0.00
Item ID:
PACB
Black Phenolic Caps with LDPE Polycone Liners
Sizes: 18-400, 20-400, 28-400
18-400 Polycone Cap
Black Phenolic Cap
18/400
As low as $0.18
20-400 Polycone Cap
Black Phenolic Cap
20/400
As low as $0.20
28-400 Polycone Cap
Black Phenolic Cap
28/400
As low as $0.25
These Black Phenolic Caps come with an LDPE polycone liner that compresses inside the bottle neck for a leakproof seal and optimal product preservation. Available in 18-400 (fits 2 oz bottles), 20-400 (fits 4 oz bottles), and 28-400 (fits 8 oz, 16 oz, and 32 oz bottles), they’re ideal for packaging essential oils, carrier oils, lab reagents, and chemical solutions that demand protection from air and moisture.

Black Phenolic Caps with LDPE Polycone Liners

Available in 18-400, 20-400, and 28-400 Neck Sizes

Key Features:

✔ Secure polycone liner ensures leakproof seal
✔ Excellent chemical and moisture resistance
✔ Ideal for aggressive or oil-based formulations

 

These high-quality black phenolic caps feature a durable cone-shaped LDPE liner (polycone) that compresses inside the bottle neck to form a tight, leak-resistant seal. Perfect for protecting sensitive formulations from air, moisture, and contamination.

Material: Black phenolic cap with LDPE (Low-Density Polyethylene) polycone liner

These caps are commonly used in laboratory, cosmetic, and aromatherapy packaging for essential oils, chemical solutions, and natural remedies. Their rigid structure and excellent chemical resistance make them ideal for products requiring extra stability and protection.

Recommended Uses: Essential oils, carrier oils, extracts, lab reagents, and other moisture-sensitive or volatile formulations.

Neck Compatibility: 18-400 caps fit 2 oz Boston Round bottles; 20-400 caps fit 4 oz Boston Round bottles; 28-400 caps fit 8 oz, 16 oz, and 32 oz Boston Round bottles.

*Polycone liners create a reliable barrier seal, ideal for preserving product quality and preventing leaks during shipping or storage.

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