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About Us
About Us

We are a Canadian-based manufacturing company that makes construction products designed for soundproofing and thermal insulation.

Ever since we built our original plant back in 1946, we’ve taken pride in our reputation as a leader in the development of innovative and environmentally friendly sound and thermal insulation products.


As a company we have always distinguished ourselves through our commitment to recycling and environmental protection. The MSL mill operates with a completely closed (zero effluent) water system, resulting in an efficient and ecologically responsible process.

MSL’s SONOPAN fibreboard soundproofing panels are among the most eco-friendly construction materials on the planet. They are made from 100% recycled wood, of which 60% is post-consumer, (used by the end user), and 40% is post-industrial (recovered from manufacturers of wood furniture, flooring etc.)

Our REFLEXOR soundproofing membrane is made with 60% recycled post-industrial polyester. It is hypoallergenic and promotes better air quality, while its thermal properties help reduce a building’s energy consumption.

Our products are made with the utmost respect for the environment and minimize the environmental impact on forest resources.

Advantages of SONOPAN:

  • 100% recycled and 100% recyclable
  • helps obtain credits for green building constructions
  • produced with no formaldehydes or VOCs (volatile organic compounds)

Advantages of REFLEXOR:

  • 60% recycled polyester
  • Provides odour and vapour barrier
  • Improves thermal performance


Our mission is to develop and produce eco-friendly, high quality, value-added sound and
thermal insulation solutions for the construction industry.