Cast & Bandage Protector You don't have to avoid the water because of a cast or bandage. SEAL-TIGHT waterproof cast and bandage protectors are the easy way to keep water out during showering, bathing or play. Easy to apply application ring eliminates need for strapping, pumps or hook & loop closure. Nonlatex diaphragm stretches easily over cast or bandage to form watertight seal. Durable polyvinyl bag prevents water penetration.