Cut Guard Biological Plant Wound Dressing - 10 Ounce Biological active product that aids in the healing of plant wounds - Comes in 10 and 16 ounces Helps heal plant wounds caused by pruning, cutting, string trimmers, etc. Forms a breathable film for air transpiration, and contains protective UV inhibitors Protects from insects, fungi and decay, and signals plant to form a callus protective tissue Remains flexible on the wound for 12-18 months, contains no "black asphalt petroleum"