Ultrum Duration Aerosol 350ml @Ultrum Duration Aerosol 350ml @ Providing effective control of adult fleas, larvae, and eggs, this long acting surface spray immediately starts killing fleas and continues to kill 100% of adult fleas for up to two months and I00% of larvae and eggs for up to six months. It's non toxic to people, plus, this can cover approximately 15 20 square metres, which is the size of an average room. A long acting surface spray for the effective control of adult