- Bactakleen odour killer is a non toxic water based deodorising spray that eliminates foul odours associated with bacteria. Most foul odours are a result of bacteria and mould growth. Odour killer effectively kills the bacteria and mould that causes foul odours.Bactashield Basic is world’s first in temporary spray on anti-bacterial surface coating that will kill haul bacteria upon contact. It is non-toxic solution without strong chemical odours and is completely transparent. It is ideal for applications such as bathrooms, kitchens, car interiors, children’s playrooms, computer keyboards, mouse and many other household applications.