Quality Overview



4M Company, Inc. / Rainier Rubber Company is certified to AS9100 Rev D. and is committed to advancing our quality system as the standards change.

Porter Seal Company functions in the same manner under the 4M Company quality requirements.

Please feel free to contact Quality@RainierRubber.com to have your specific questions addressed.

We strive to meet or exceed all of our customers’ requirements by utilizing continuous improvement of our Quality Management System to facilitate and measure customer satisfaction.

Rainier Rubber Micro-Vu technology