Should I Use Polyurethane Or Epoxy?
These are two very different products, due to their distinct and divergent physical properties: the capacity for elongation or flexibility.
As such, polyurethane-based injection liquids exhibit an elongation capacity of 10% to 400%, while the epoxy will provide only 0% to 10%.
In the residential sector, cracks have very little influence on the structural integrity of buildings. As a result, manufacturers routinely recommend the use of polyurethane for its elongation or flexibility properties in the case of active cracks or the possibility of movement.
Polyurethane provides an effective solution for waterproofing cracks in concrete. It therefore makes it possible to effectively prevent water infiltration. As for epoxy, it has a much higher resistance capacity, but will mainly be used for large structures (bridges, tunnels or dams, etc.).