The plastic acts like a rebar, allowing the brick to absorb and mitigate fractures that would ordinarily crack the brick and compromise it's integrity. They wo

The plastic acts like a rebar, allowing the brick to absorb and mitigate fractures that would ordinarily crack the brick and compromise it's integrity. They would not have the same compressive strength as a cement brick, but would likely fare far better for use cases like pavers and retaining walls. I would imagine they perform better in earthquake situations and may have longer longevity than steel rebar enforced concrete.