Pressure sensitive, waterproof adhesive compositions

A curable pressure sensitive, waterproof adhesive mixture comprising:

• a) a urethane component at a range of about 30-50 wt % of the mixture, wherein the urethane component has an average NCO content of about 7% to 23%, wherein the urethane component comprises at least one urethane selected from a group consisting of a slow-cure urethane having a functionality (Fn) of about 2.5 to 2.55 and an NCO content of about 15 to 23%, and a flexible binder urethane having a functionality (Fn) of about 2 and an NCO content of about 2 to 10%;
• b) a first silane component at a range of about 2-10 wt % of the mixture, wherein the first silane component comprises an amino-functional alkoxysilane polymer having terminal silanol groups;
• c) a second silane component at a range of about 2-10 wt % of the mixture, wherein the second silane component is a vinyltris(methylethyl-ketoximino)silane;
• d) a reinforcing extender at a range of about 2-10 wt % of the mixture;
• and
• e) a thixotropic agent at a range of about 2-10 wt % of the mixture;
• wherein when the adhesive mixture is applied to a substrate, the second silane component suppresses the cure rate of the mixture, and thus the adhesive mixture has a tack-free time of at least about 90 minutes,
• wherein the adhesive mixture is waterproof, hydrolytically stable, and pH-resistant.