Based on our own experience, these connectors have proven to be a great addition to our industrial electric equipment. They are not only waterproof but also easy to install and provide a SECURE connection between wires. Moreover, their material is durable and resistant to external factors. The only downside is that they are a bit pricier than other non-waterproof connectors we've used. Overall, highly recommendable for any industrial and scientific applications that require waterproof electrical connectors..