Studies conducted by Cheng et al. [9] showed a decrement
of flexural modulus by 40%, after 403 days of immersion in
osmotic water at ambient temperature, although, flexural strength
was not significantly affected. Even after 403 days of immersion,
the equilibrium state was not attained, and the absorption curve
was still ascending. Stark and Gardner [10] also demonstrated that
the flexural modulus and strength of a saturated WPC material
with 40% filler loading decreased by 39% and 22%, respectively.