This tried and trusted formula is available in the UK as an equestrian premises spray to protect the horseâs environment from irritating and biting insects. Contains Permethrin and Pyrethrin, for instant âknock-downâ and a long lasting protective âshieldâ. UltraShield offers all-round protection in equestrian premises, stables and barns, and in dog sleeping quarters.Please note Images shown may not represent exact sizes colours types etc