Borer-Resistant Wood, Wood Products, and Wooden Structures and Methods

A borer-resistant wood, wood product, or wooden structure comprising:

• a wood, wood product, or wooden structure having a one-part polyurea composition applied thereto in an amount effective to suppress degradation by a wood borer, wherein the one-part polyurea composition comprises:
• (a) one or more compounds having Formula I:
• wherein j is an integer of 3 to 30 and R1 is an unsubstituted homocyclic or heterocyclic aryl radical or alkyl, alkoxy, alkylthio or halogen substituted homocyclic or heterocyclic aryl radical;
• (b) an aromatic polyisocyanate, a polyurethane/urea prepolymer having aromatic isocyanate groups, or a combination thereof;
• and
• (c) a protic acid or a salt thereof.

A borer-resistant marine piling apparatus comprising a wood marine piling and a protective member surrounding the piling which suppresses degradation of the piling by borers;

• wherein the protective member comprises a fiber-reinforced polymer composite surrounding the piling, defining an annular space between the composite and the piling, and a grouting material filling at least a portion of the annular space between the composite and the piling and
• wherein the composite of the protective member comprises a fiber-reinforcement material and a resin material including a one-part polyurea composition comprising:
• (a) one or more compounds having Formula I:
• wherein j is an integer of 3 to 30 and R1 is unsubstituted homocyclic or heterocyclic aryl radical or alkyl, alkoxy, alkylthio or halogen substituted homocyclic or heterocyclic aryl radical;
• (b) an aromatic polyisocyanate, a polyurethane/urea prepolymer having aromatic isocyanate groups, or a combination thereof;
• and
• (c) a protic acid or a salt thereof.