© 2026 Masscon Construction | Stop & Seal Canada | All rights reserved.

Passionate about all aspects of construction and commited to excellence, Masscon has earned a reputation as a reliable and trustworthy general contractor. 

With extensive experience in commercial and residential construction, and having successfully completed projects of varying sizes and complexities, from single-family homes to multiplexes and commercial, industrial, and civil projects, no project is too challenging.

Stop & Seal, a technology exclusive to Canada by Masscon Construction

General Contractor, Montreal

Kevin L.

Thanks to Masscon and their Stop & Seal technology for the excellent service. Our concrete is now watertight and strong!

Stop & Seal complies with the following sectors :

Offered exclusively in Canada, Stop & Seal is distributed and installed by Masscon Construction

Humidity

Stop & Seal penetrates the concrete and blocks water at the source. Moisture can no longer seep in, keeping the structure dry and stable - even in extreme conditions.

By preventing water from entering concrete, Stop & Seal eliminates the primary cause of cracking caused by repeated freeze-thaw cycles.

Less water means less oxygen and fewer salts reaching the reinforced steel. Stop and Seal slows corrosion and extends the service life of reinforced concrete structures.

Freeze-thaw Cycles

Premature corrosion

It succumbs to water, frost and salt, always in the same way, always at the same cost. 

Every leak becomes a repair, and every winter reduces the lifespan of your structures.

Concrete doesn't crack by chance.

Stop & Seal technology protects concrete where others fail.

Unlike surface sealers, Stop & Seal penetrates deep inside the concrete to create a long-lasting barrier against:

Stop & Seal offers durable protection for commercial and multi-residential building infrastructure. Tested under real-world conditions, the solution protects surfaces against water infiltration and wear, while extending the lifespan of buildings.

Commercial | Multi-residential

Designed to meet the demands of industrial environments, Stop & Seal provides long-lasting protection for surfaces subjected to intensive conditions. Tested in real-world conditions, the solution limits water infiltration, resists wear and tear, and helps extend the lifespan of industrial infrastructure.

Industrial

For civil projects, Stop & Seal provides long-lasting protection for infrastructures exposed to the harshest conditions. It prevents water infiltration, limits material wear, and extends the lifespan of structures.

Civil

Hard to beat! From the service speed to speed of execution, the Masscon team and Stop & Seal technology have laid our foundation.

Building Manager, Montreal

Sylvain B.