A curable composition and method for producing a tear resistant, yet soft
and deformable in-the-ear product yielding the user greater comfort and
durability. The curable composition incorporated into a hearing aid
apparatus provides a deformable, yet tear resistant housing, which may be
mated to a soft tip component. The hearing aid housing provides better
comfort, durability and acoustic performance for a variety of ear canal
shapes. The curable composition that provides these properties includes
at least one urethane acrylate oligomer, at least one reactive diluent
and a cure system. The composition when cured desirably produces a tear
strength of at least about 75 pli and a hardness of about Shore A 60 to
about 75.