A kerosene-based (odourless), ready for use (RFU) fly spray based on the killing agent permethrin and the knock down agent tetramethrin. The formulation is synergised with piperonyl butoxide and approved in the UK for application as a residual spray and as a space treatment. This product is designed for application through a simple atomiser for the control of flies and other flying insects in a wide range of situations including farm buildings. It is also extremely effective as a ready for use surface spray for the control of resting or crawling insects. Professional use only.