Within certain limits, URETEK's polymer resin demonstrates elastic characteristics.

Hooke’s Law indicates that compression is proportional to the applied forces and will not exceed more than 2%-10% in deviation.

Only when force exceeds the elastic limit is the internal cellular structure permanently modified and will not recover its initial form. The elastic limit depends on the density of the material. The four diagrams indicate the effect of density on its resistance to forces of compression, shear, bending and tension.

The URETEK polymer is primarily used to consolidate ground and to re-level settled structures. It is clear that, from a practical point of view, the most important property is compressive strength.

Diagram 6.1a relates the density of the material to its compressive strength. The usual surface density of the URETEK material, which is about 5 lb/ft3 when injected beneath flooring, can reach 20 lb/ft3 in deep injection levels.

The elastic limit varies between 150 PSI and 900 PSI.

The URETEK polymer has considerable shear strength, which for a standard thickness to the ASTM standard, varies from 70 to 420 PSI, according to the density of the material.