Urinal Blocks Para Urinal Blocks – A scientific process known as sublimation causes Para blocks to effectively mask urine odor. Using urinal blocks is another way to impress customers and end users with the cleanliness of your restrooms. Non-Para Urinal Blocks – These fragrant blocks are entirely safe and work effectively to mask urine odor. Unlike Para blocks, Non-Para blocks are acceptable for use in all fifty states within the US. When used regularly, these blocks improve the cleanliness and fragrance of your portable restrooms! Order Online Request Information What Strength Deodorizer do you need? Cabana Spray | Urinal Blocks | Urinal Screens | Bandit | Air Works