Ultra Boss Pour-On Quart


Ultra Boss Pour-On Quart

Merck - Ultra Boss Permethrin Insecticide Pour-On for Cattle, Sheep, Goats and Horses is a synergized formula.

Contains 5% permethrin and 5% piperonyl butoxide.

Applicator gun sold separately!


Synergized with an extra ingredient to make the formulation stronger and last longer, UltraBoss offers optimized control of horn flies (for up to 8 weeks); as well as horse flies, face flies, stable flies, black flies, lice, mosquitos, and ticks. It also controls keds and lice on sheep. Season long lice control with one application (January to April).

Species: Beef and lactating/non-lactating dairy cattle, calves, sheep, goats and horses


Special formulation provides a stronger and longer lasting product. 

There is no milk or slaughter withdrawal. 

Can be used safely in a variety of species. 

Can also be used in back-rubbers for application


Hazards to Humans and Domestic Animals: CAUTION: Harmful if absorbed through skin. Avoid contact with skin, eyes, or clothing. Wear long sleeved shirt, long pants, shoes, socks, and chemical resistant gloves (Barrier laminate, Nitrile rubber, Neoprene rubber, Viton, selection category E). Prolonged or frequently repeated skin contact may cause allergic reaction in some individuals.

Do not contaminate water, food, or feed by storage or disposal.

STORAGE: Keep container sealed when not in use. Do not store near food or feed.


Cattle, calves, and horses: Apply 3 ml per 100 lbs body weight up to a maximum of 30 ml per animal. Apply down the center of the back and face.

Sheep and goats: Apply 1.5 ml per 50 lbs of body weight up to a maximum of 18 ml per animal. Apply down center of back and face.

For use in backrubber mix 100 ml per gallon of #2 diesel oil or mineral oil. Keep rubbing device charged. Results improve with daily forced use


Specific References

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