Industrial Plastic Caps | Rubber-Like End Caps Made from Plastisol
If you’re looking for high-quality standard-sized rubber caps for sealing, protecting, or finishing parts, you’re in the right place. At Carlisle Plastics Company, Inc., we manufacture a wide range of plastic end caps and plastic caps designed for precision, performance, and durability. Whether you need a snug fit for tubing, protection for hardware, or a clean finishing touch for exposed edges, our caps have you covered and provide a reliable solution. With global shipping and over 60 years of experience, we’re trusted by industries of all kinds to provide reliable, American made plastic solutions.
What Are Plastic Caps?
Plastic caps are referred to by many different names including PVC Caps, Rubber caps, PVC end caps, plastic end caps, rubber caps, plastisol caps, flexible rubber end caps and vinyl caps just to name a few. Plastic end caps are protective coverings used to seal or finish the ends of pipes, tubes, rods, or structural components. They serve as barriers against paint, dust, dirt, moisture, and accidental impact, and are essential for preserving the function and appearance of parts across many environments.
These caps are dip-molded from flexible plastisol PVC, a material known for its durability, resistance to chemicals and UV, and easy application. Whether you’re covering a bolt head, capping a pipe, or protecting medical equipment, plastic caps come in multiple sizes and shapes to fit your exact needs.
Plastic caps can be permanent or temporary. Some are designed for shipping or masking during painting or coating; others are used long-term as part of the finished product. Standard and custom molded options ensure that each order meets both functional and aesthetic criteria. Vinyl plastisol caps are available in multiple durometers (from soft, grippy to semi-rigid) to offer a variety of plasticity benefits, ideal for delicate or sturdy parts.
At Carlisle Plastics Company, we manufacture plastic caps in round, pull-tab, step, square, hex, angle, and rectangle profiles. Every cap can be ordered in our standard sizes or custom-built to match your specifications. Whether you need plastic caps in bulk or in smaller production runs, Carlisle Plastics Company has you covered. No plastic cap order is too big or small!
Standard Sizes and Color Options for Plastic End Caps (Custom Sizes & Colors Available)
All Carlisle Plastics PVC cap products are available in a wide range of standard sizes, designed to fit common diameters and profiles. These include round, pull-tab, step, square, hex, angle, and rectangle configurations. With a large library of in-house dies (molds), most orders can be fulfilled quickly and affordably without additional tooling set-up.
We also offer a variety of standard color options to meet functional and branding needs. Standard colors include: Black, White, Gray, Red, Orange, Yellow, Green, Blue, Translucent Clear (milky), and Matte Black (semi-textured). These shades are commonly used for identification, safety coding, and aesthetic matching.
Our Plastic Cap Products
Round Plastic Caps
A versatile plastic end cap for round tubing. Plastic round end caps are designed to fit tightly over round tubing, rods, or fittings. Made from flexible, durable PVC plastisol, they protect against dust, debris, and damage during use or transport. Available in many standard colors and sizes, they can be used for temporary or permanent applications. Stock dies and fast production ensure short lead times, even on custom runs.
Round PVC Caps with Pull Tabs
These caps function just like standard round PVC plastisol end caps but feature an extended tab for quick and easy removal. They’re perfect for situations where frequent access or removal is needed without tools. Flexible enough for multiple uses but strong enough for shipping or production. Ideal for protecting ends during storage, transit, or routine maintenance.
Angle Plastic Caps
Angle caps are designed to fit snugly over L-shaped materials like angle iron. They provide both protection and an attractive finish for corners and structural ends. These PVC plastisol caps are often used on furniture, shelving, or equipment that requires safer edges and moisture resistance. Standard sizes are available, and custom molds can be created in-house.
Flat & Rectangle Plastic Caps
Made for flat and/or rectangular surfaces, these plastic end caps cover tubing, handles, brackets, and more. They help protect surfaces from scratches, dents, and wear while also improving grip and appearance. Common in industrial manufacturing, medical and commercial settings, they offer functional sealing and aesthetic polish. Carlisle Plastics Company can deliver standard sizes or build to your dimensions.
Hex Plastic Caps
These are made to fit over hex bolts, nuts, and shafts, providing full edge protection and a clean appearance. Their flexibility allows them to snap in place and stay secure under vibration or handling. Frequently used in the hardware and electronics sectors, they’re ideal for corrosion protection and part masking. Stock and custom sizing available.
Square Plastic Caps
Perfect for square tubing, posts, or structural parts, these caps offer firm sealing and impact resistance. Whether used on fencing, equipment legs, or frames, they add both function and finish. Carlisle Plastics Company’s square plastic caps come in multiple sizes, durometers, and colors to match your application. They can be ordered in small batches or bulk quantities.
Industries That Use Flexible PVC Plastic Caps
Plastic caps are used in a wide variety of industries due to their durability, adaptability, and cost-effectiveness. In the medical field, they help protect instruments and equipment, ensuring sanitary and damage-free transport. Manufacturers and fabricators rely on flexible rubber-like end caps to protect components during production and shipping, while automotive and aerospace companies use them for masking, sealing, and long-term part protection.
Furniture manufacturers use plastic end caps for clean finishes and injury prevention on exposed ends of metal tubing. Electronics and electrical companies use vinyl caps for insulation and dust protection. Even in construction and agriculture, these caps help preserve equipment and improve the longevity of structural components. Whether temporary or permanent, plastic caps serve a critical role in keeping parts safe, clean, and secure.
Custom Plastic Cap Solutions – Flexible, Affordable, No Minimums
When standard sizes or colors don’t fit your needs, Carlisle Plastics Company offers custom plastic caps tailored to your exact specifications. From sizing and durometer to finish and color matching, our in-house team can create custom tooling quickly and affordably.
And custom doesn’t mean expensive. Carlisle Plastics Company is proud to offer some of the most affordable custom dip-molded cap solutions in the industry, thanks to efficient processes, years of experience, in-house design, and low overhead. Our team serves businesses of all sizes—whether you’re ordering one prototype or a full-scale production run.
Even better, there are no minimum order sizes. Whether you need one part or one million, you’ll get the same personal service and quality assurance Carlisle Plastics Company is known for.
About Carlisle Plastics – More Than Just Plastic End Caps
Carlisle Plastics Company is a family‑owned and operated, ISO 9001:2015 certified U.S. manufacturer with over 60 years of experience in dip‑molded plastic products. Beyond PVC end caps, we offer dip coating services, applying durable plastic coatings to tool handles, knobs, transport racks, baskets, wire guides, and more—ideal for abrasion resistance, insulation, and cushioning. Our in‑house facilities include secondary operations like imprinting, punching, hot‑stamping, slicing, and custom packaging to provide turnkey plastic finishing solutions.
Whether you’re seeking standard-size PVC end caps, custom dip‑molded parts, or Plastisol coatings, Carlisle Plastics Company delivers quality, flexibility, and responsiveness with no minimum order quantities and competitive pricing. As a family‑owned and operated small plastic manufacturing business, we are dedicated to communication, quality, and accuracy to ensure customer satisfaction. We excel at supporting projects both large and small—offering exceptional customer service, fast turnarounds, and global shipping from our USA production facility. By combining technical expertise with customer-first service, Carlisle Plastics Company is the go-to partner for dip molded plastic components across a wide range of industries.