Non-toxic formula bird repellent. Adheres to all surfaces and retains soft, sticky elasticity that is uncomfortable to birds. Completely non-poisonous. When used according to directions it will not injure birds. Birds will not roost where applied. Ideal to use on roosting places, window sills, ridge lines of roofs, gutter edges, top of signs, ornamental copings, cornices and ledges. Contains no toxic chemicals. Fits any standard caulking gun. Can be used in any weather, indoors or outdoors. Withstands temperatures to 200 degrees Fahrenheit.