Can ruggedization make lenses waterproof?

Ingress Protection Ruggedization is another type of ruggedization in which lenses are sealed using O-rings or RTV silicone to make them waterproof, dustproof, and fog proof. EO offers an off-the-shelf line of Ingress Protection Ruggedized lenses, TECHSPEC^® HEO Series M12 μ-Video™ Imaging Lenses. For more information on Ingress Protection Ruggedization, please visit our Ruggedization of Imaging Lenses application note.