I used to but couldn't get the PB08 for a while. Plus, I followed the instructions but it seemed like it was too harsh/strong and burned the cows. Never had a problem before but a lot of them started running for cover when I started spraying. I also used just permethrin with oil for a while but eventually went back to Fly Ban.
This is Grit's recipe:
This one is similar to UltraBoss, 6oz permithion, 6oz PBO8 and 1 qallon corn oil. I add a pint of diesel fuel because I use old 5 liter pour on wormer containers and application gun.
This one is similar to Ultra Sabre, 3 oz Lambda-cyhalothrin, 6oz PBO8 and 1 gallon of corn oil, I also add diesel fuel to this mix.
Prentox PBO-8 Synergist is an emulsifiable concentrate that synergizes most commonly used insecticides. It contains the only US-made Piperonyl Butoxide as its active ingredient and it is used as an additive in many insecticides to help enhance their performance and resistance management. It is designed to help improve control of insects and mites using lower rates. With its low risk toxicological profile, PBO-8 is safe for humans and the environment. PBO-8 can be used in a variety of different locations from residential dwellings to livestock housing. It works with different types of fogging, misting, or spray equipment to let you use it according to site or pest requirements. But, it is not to be used in outdoor residential misting systems. When mixing PBO-8 with insecticides or acaracides, please do so as listed on the product label. This product has no insecticidal activity on its own.
I use a gun full on cows, 2 gun fulls on bulls and a half a gun or less on calves. I start behind the ears and go to the tail head. The recommend dose is 3 ml per 100 lb. Reminder, the under use of insecticides creates immunity and doesn't work nearly as well.
https://www.domyown.com/prentox-pbo8-synergist-p-15604.html
https://www.domyown.com/demand-cs-p-46.html
https://www.domyown.com/permethrin-sfr-368-p-445.html