Closure material decides seal performance, application torque and cost. Delta El Nile for Industry selects the polymer per format and filling line.
Caps we mould for beverage brands — Coca-Cola, Sprite, Vimto, Al Ain, Big Cola and more. More from our closure plant →
HDPE — the default
Most Delta closures are HDPE: water (29/25, 48 mm), CSD (PCO 1881), juice & dairy (32/15, 37 mm press-on, 38 mm) and the 29/21 oil caps. HDPE balances stiffness, sealing and low cost.
PP — the 55 mm lid
The 55 mm lid is PP for its rigidity and snap behaviour on the returnable 5-gallon format.
LDPE — the 55 mm standard
The 55 mm standard closure uses LDPE for a softer, conforming seal on the 5-gallon neck.
2-piece oil — HDPE + LDPE
The 29/21 2-piece oil closure pairs an HDPE shell with an LDPE liner for a clean pour and reliable oil seal; the 1-piece version is all-HDPE.
Most Delta closures are HDPE — water (29/25, 48 mm), CSD (PCO 1881), juice/dairy (32/15, 37 mm, 38 mm) and 29/21 oil caps. The 55 mm 5-gallon lid is PP; the 55 mm standard closure is LDPE.
Why is the 5-gallon lid PP and not HDPE?
The 55 mm lid uses PP for its rigidity and snap behaviour on the returnable 5-gallon format, while the 55 mm standard closure uses LDPE for a softer, conforming seal.
What is a 2-piece oil closure made of?
The 29/21 two-piece oil closure pairs an HDPE shell with an LDPE liner for a clean pour and reliable oil seal; the one-piece version is all-HDPE.
How do I pick the right closure material?
Match the closure to the preform neck and application — HDPE for most caps, PP for the 55 mm lid, LDPE for the 55 mm standard. Use the Product Finder to match a closure to your neck.
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