J.M. Power Aggregates Limited

Since 1985, we have been supplying lightweight aggregates to hydroelectric dams throughout North America to seal sluice gates, head gates and stop logs.

We supply large and small utility companies throughout North America with a new, proven STOPLEAK solution that quickly seals gates & stop logs and is environmentally friendly. 

Replacement for Coal Cinders, Bottom Ash and Clinkers

The need to source an effective alternative to coal cinders, bottom ash and clinkers began in the early 90’s when environmental impact reviews occurred at hydro operations across North America.

Some hydro producers continued their use of coal cinders, bottom ash and clinkers while others tried different materials such as corn, wood chips, horse manure and concrete materials with limited success.

Natural Cinders - A proven, environmentally friendly STOPLEAK solution

We have invested a great deal of time and efforts into the development of a unique blend of naturally occurring material called Natural Cinders.

This new, proven STOPLEAK product surpasses the sealing abilities of other alternatives and is environmentally friendly.

Products & Services

Natural Cinders - A proven, environmentally friendly STOPLEAK solution.
In many jurisdictions, the use of coal cinders, bottom ash and clinkers has been banned.

Natural Cinders is a new, proven STOPLEAK solution that quickly seals gates & stop logs and is environmentally friendly.

To ensure optimum, repeatable performance, we have created a custom blend of this naturally occurring material that outperforms other alternatives.