Methods of applying coating compositions

A method comprising:

• contacting a polyol-containing layer including a polyol in an amount of 10 to 70 percent by weight and a isocyanate-catalyst-containing layer including an isocyanate and a catalyst to form a boundary layer between the layers being a reaction product of the polyol and isocyanate catalyzed by the catalyst and carried out at 68° F. to 75° F.

A method comprising:

• contacting a first layer including a polyol or thiol in an amount of 10 to 70 percent by weight and a second layer including a reactive component reactive with the polyol or thiol and a catalyst to form a boundary layer between the layers being a reaction product of the polyol or thiol and the reactive component catalyzed by the catalyst and carried out at 68° F. to 75° F.

A method comprising:

• contacting a first layer including a first reactive component being present in an amount ranging from 10 to 70 percent by weight of the first layer and including at least one of a thiol composition, a multifunctional acid composition, an amine composition, an anhydride composition, a polyol composition, and an acetoacetate composition, the first reactive component being present in an amount ranging from 10 to 70 percent by weight of the first layer and a second layer including a second reactive component at least one of an isocyanate composition, an epoxy composition, a blocked isocyanate composition, acrylate compositions, and a ketimine composition, the first or second layer including a catalyst for a reaction between the first and second reactive components;
• and
• forming a boundary layer between the first and second layers and being a reaction product of the first reactive and second components catalyzed by the catalyst carried out at a boundary layer reaction temperature.