596526 Disclosed herein is an ectoparasiticidal composition comprising a mixture of a carrier and an active with an emulsifying agent, such as a silicone copolymer, the carrier comprising a non-volatile low viscosity siloxane having a viscosity in the range of 10 to 1000 centistokes inclusive and the active comprising a non-volatile high viscosity siloxane having a viscosity of at least 1000 centistokes, such as dimeticone, or a demeticonol or a mixture of same, both the low viscosity siloxane and the high viscosity siloxane having a closed cup flash point of at least 100 DEGREE C. Additionally, wherein the composition comprises an essential oil, such as nerolidol, and further a thixotropic additive, such as silicon dioxide nano-size particles.
