Ace Seal is a global manufacturer of custom o-rings, seals, gaskets and other molded rubber & plastic components

The Leading Manufacturer of Custom Rubber O-Rings, Gaskets and Seals

o-rings, gaskets, and seals

Since 1982, Ace Seal has been a worldwide leader in sealing solutions. We specialize in manufacturing rubber O-rings, seals, gaskets, barrel bungs, custom molded rubber products, and more, using a variety of elastomers. A wide selection of stock items at wholesale prices, along with our customization capabilities, make Ace Seal the right choice for all your sealing needs.

Based in Silicon Valley, we serve clients across the country and around the world. Request a quote on the rubber and plastic sealing products you need, or send us a message to discuss your unique application. 



Standard O-Rings, Gaskets and Seals

Ace Seal maintains a huge inventory of standard/stock molded rubber products. We offer o-ringsquad- and x-rings, and backup rings in all standard AS568 sizes. We also stock a variety of gaskets and other products designed for reliable sealing. 

  • Same day shipping on standard items
  • 40 years of experience
  • Wholesale & volume discounts on top-quality products

Silicone Barrel Bungs for Wineries, Distilleries, and Breweries

Our barrel bungs fit French and American barrels and are made from silicone to resist mold, odors, and warping. We offer fermentation bungs and solid and hollow barrel bungs and stoppers in a variety of styles, sizes and colors. We also provide made-to-order barrel bungs in the custom color and print you require.


Custom O-Rings and Other Rubber Molding Services

Ace Seal specializes in custom molding services to create high quality sealing parts and components designed to your exact specifications. We can accommodate low to high volume requests quickly and at cost-effective prices. We will work with you to develop the right design for your application and select a material that provides the durability and performance you need.


Custom Rubber Products and Seal Accessories

Ace Seal provides a wide range of additional rubber products and accessories to accommodate your sealing application. Browse our selection of O-ring cord and kits, rubber sheeting, and industrial sealing products like measuring tools, lubricants and greases, Hylomar Sealing Compound, O-ring extraction tools, and more.


Elastomer Options for Any Application and Operating Environment

Ace Seal has the molding experience and technology to work with a variety of plastic and rubber elastomers. We can provide O-rings, seals, and gaskets in materials to fit even the most challenging applications. Check out our comparison chart to learn more about the properties of each material.


Rubber and Plastic
Material Options


Industries Served

Your Trusted Custom Seals, Gaskets and O-ring Manufacturer  

Ace Seal is the #1 leading provider of standard and custom molded rubber products, O-rings, gaskets and seals. When you order from us, you receive high volume discounts, same-day shipping on in-stock items, and high quality products manufactured to your exact specifications. We have a team of qualified sealing experts who can offer you the design assistance you need for any custom application. Request a quote today. We look forward to serving your sealing needs.


Ace Seal is also an authorized distributor of numerous other Molded Rubber Products, Custom O-rings and Seals & Gaskets related to the Sealing Industry.

Our San Jose facility provides both onsite Inventory Management and Stocking Programs for local customers. Contact our Product and Engineering Specialists with your questions and requests. We look forward to the opportunity to service your sealing requirements.