Versele laga oropharma deodo odour binding agent is an odour neutraliser for cat litter trays it is available in either floral or lavender fragranced varieties to make your cats litter tray smell a lot more pleasant the deodo powder does not just hide unpleasant fragrances it binds and neutralises them to create long lasting freshness this product is easy to use simply strew it evenly across the bottom of the cat litter tray and then put the litter on top it can help to keep litter fresh