Polysar, or the adventure of producing synthetic rubber in Canada

By François Larivée

If you were born before 1980, you may remember a picture of a large industrial complex on the back of the ten-dollar bill. An image of the Polysar (originally Polymer) plant in Sarnia, Ontario, was featured on the bill between 1971 and 1989. The company was created by the Government of Canada in 1942 as a Crown corporation, and its archives are held by Library and Archives Canada. Its history is nothing short of fascinating.

Black and white photograph showing three large spherical reservoirs and a complex network of pipes in the foreground. In the background we see a tall chimney spewing out flames and smoke as well as a building with five other chimneys.

View of pipes and three Horton Spheres storing a mixture of butylene and butadiene used in the manufacture of synthetic rubber at the Polymer Rubber Corporation plant, September 1944 (MIKAN 3627791)

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