Use a discharge pressure of 40 psi.
Protect your property from the annoyance mess and constant clean-up that pest birds cause. It s the easiest way to bird-proof open or recessed areas and hide-away corners. One gallon covers up to 120 square feet or an average tree with a 5" diameter trunk. Although it is non-toxic and non-lethal its "feel" is extremely irritating to roosting birds.