O-Rings and Basic Seals Suppliers

O-Rings & Basic Seals

Explore thousands of custom and commodity sealing solutions for multiple applications.

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Performance Seals Suppliers

Performance Seals

From spring-energized seals to glide and backup rings, we have the performance seal you need.

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Custom Molded and Gaskets Suppliers

Custom Molded & Gaskets

Explore our range of custom-molded seals and other components for your specific applications.

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Engineering Services

Engineering Services

From inspection and design support to coatings and cleaning, our engineers are ready to help.

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Why Marco Rubber & Plastics?

Marco Rubber & Plastics offers the most diverse material options in the market. We supply o-rings and seals in any size, material,
durometer and performance requirements. Specialty material development and design support are typically available at no cost.

Exceptional Service

Talk to our experienced professionals to find creative product and service solutions. Typical office hours are M-F 8:30 am-5:00 pm EST. We respond to email in hours if not minutes.

Product Knowledge

The Marco sales team is backed by expert engineers available for on-demand conference calls to offer application specific material and design support to meet any sealing challenge.

Expert Customization

We work with you to tailor our products and services to match your requirements, or provide a fully custom solution. Get custom o-rings, square rings, and x-rings in nearly any material.

Intelligent Database

Our integrated o-ring inventory network allows us to have real-time access to in-stock materials and provide fast, accurate quotes so you can be confident your order is en route.

Specialized Materials

We offer 3,000+ materials that deliver performance and price advantages for your application. Popular materials like Kalrez, Viton, and Parker are in-stock, many with same-day shipping.

Competitive Pricing

Whether you need a high-temperature, high-pressure, or chemical-resistance seal, our team is committed to finding the right material at the best possible price for your application.

ISO 9001:2015 Certified by NQA

Our Quality Management System (QMS) is ISO 9001:2015 Certified by NQA, demonstrating our dedication to continuous improvement, innovative and adaptive leadership, evidence-based decision making, and top-of-the-line quality management.

Have Questions?

Connect With An Expert

  • Expert product, application and design assistance
  • Trusted by 14,000+ customers
  • Fast response (asap within hours)
  • Same day shipping for most in stock products
  • 3,000+ custom sealing material formulations
Fill out the form or give us a call.
(603) 468-3600

Delivering Proven Performance for Multiple Industries

Every industry is unique. We understand the challenges you're facing and will match you with the best sealing solution for your success. Explore our industry expertise below.

Semiconductor, Solar, LCD
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Food, Water, Life Sciences
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Aerospace & Military
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Oil & Gas Refining & Exploration
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Chemical Handling & Processing
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Electronics - EMI Shielding
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Popular Sealing Material Families

We're proud to offer the world's largest inventory of readily-available and highly customized sealing solutions. Explore some of the most common sealing materials we offer here.

Industry Leading O-Ring Reference Guides

Looking for design guides and technical information? We've got you covered. Find size guides, analyses,
and more in our library of reference guides developed by our material experts.

O-Ring Material Selection Guide

Explore o-ring materials to compare temperature, performance, chemical resistance, abrasion, and more.

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O-Ring Size Chart Dimensions

Browse in-depth charts on o-ring and sealing product sizes to find the right seal for your application.

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O-Ring Tolerances Guide

View inside diameter and cross section tolerance levels for o-rings in different size measurements.

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O-Ring Gland Design Guide

Groove design is critical to o-ring success. Learn key considerations and browse guides here.

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O-Ring Chemical Compatibility

Browse and compare o-ring compatibility ratings and costs with thousands of chemical types.

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