As of July 30th, 2021 Global Rubber Products was purchased by Niagara Rubber Supply Inc. Changes and updates to the website are coming but all customers should be aware that the location at 515 Milner Avenue in Scarborough is closed. All emails and current contact information are still intact or alternatively, you can contact Niagara Rubber Supply directly. Global Rubber has provided quality service to their customers for over 40 years and we feel becoming part of the Niagara Rubber Supply family is a great way to continue on.

Niagara Rubber Supply Inc.

94 Dunkirk Rd, Unit 12N

St.Catharines ON

L2P 3H4

905-682-7272 or 416-293-1990

Email: as well will connect you with our team.


O-Rings are some of the most common seals used in today’s modern machine designs. Beyond their impressive performance specs, O-Rings are cost-effective and easy to use. With advanced polymers, our stock and custom O-Rings can withstand tens of megapascals of pressure—that’s thousands of pounds per square inch!

O-Rings can be manufactured in a variety of compounds in both imperial and metric sizes. Even the standard imperial-sized AS 568 (Aerospace Standard) comes in over 360 different sizes of cross section (C/S) and inside diameter (I.D.).

Back-up Rings

Nominal Cross Section Actual C/S Inside Diameter from Thru Inside Diameter
0 Series 1/16” C/S
.070” C/S
5 ¼”
1 Series 3/32” C/S
.103” C/S
9 ¾”
2 Series 1/8” C/S
.139” C/S
3 Series 3/16” C/S
.210” C/S
4 Series 1/4” C/S
.275” C/S
4 ½”

Imperial & Metric O-Rings

O-Rings are available in a multitude of compounds, with some of the more popular options being:

We also have quad rings and square rings available.

Metric sizes are available in over 4000 different sizes depending on where they are being produced. In Germany, Sweden, France, Britain, Italy, and Japan, standard dimensions are slightly different from one another.

When there is no standard size to suit your requirements, custom options are available.

O-Rings – PTFE Encapsulated

Back-up Rings

O-Ring – Custom Vulcanized (Endless)

Our custom vulcanized endless O-Rings come in imperial (inch) sizes, from 1/16” to 1”, as well as metric sizes from 1.6mm through 25mm and above. Custom vulcanized O-Rings are available in round or square rubber cord varieties. Compounds include: Buna’n, EPDM, Silicone, Neoprene®, Aflas®, Isoprene and Fluoroelastomer in black, green, brown, red, blue, and white.

For additional ordering information, please view our product catalogue, or contact Global Rubber Products today to speak with a sales associate.