StockCap is the foundation of the Sinclair & Rush company. Stockcap with a small line of protective caps and plugs and has grown to become the largest manufacturer of flexible closures in the world. In addition to a large selection of stock products, StockCap has 50 plus years of experience in dip molding and can offer customers new and unique solutions to their product protection problems.

Unmatched Selection

• More styles and sizes
• More standard colors and materials so you don't have to pay for custom matching services
• One of the only closure manufacturers to mold flexible rubber products
• In-house secondary department offers both one-color and multi-color printing as well as slicing, punching and packaging services

Low Cost

• In addition to being the largest dip molder in the world, StockCap is also one of the largest plastisol compounders. StockCap buys material in full truck and tanker quantities and eliminate the profit margin that competitors pay to their compounder.
• Numerous machine designs for running parts in the most effective manner. Other companies typically have a machine or two that are designed to do everything...but nothing cost effectively.
• StockCap plants were designed and built to manufacture dip molded items in the most cost effective manner possible.

Short Caps

Long Caps

Rectangular Caps

Square Caps

Square End Caps

EZ Tab Caps

Grab Tab Caps

Hanger Caps

Angle Caps

SR Flange Cover

T-Plugs

End Caps

Electrical Connector Caps

Electrical Connector Plugs

Tear Caps

Threaded Caps

EPDM Rubber Caps

Hanger Tips