IP65 Waterproof Protection (IP65 = Splashproof) is achieved with polyurethane and silicon, which is the most expensive and best method that can be used on LED strips. This waterproof protection is very durable and does not become "yellowish" as tends to happen with most LED strips within 3 months of installation.
Moreover, the LED strip remains extremely flexible, very clear, soft and well-protected throughout its lifetime and can keep its IP65 rating for more than 5 years if installed using an aluminium LED profile (allowing it to run at lower temperatures). Please note that IP00 rated LED strips are recommended wherever an IP65 rating is not required (e.g. in indoor spaces) as these are easier to handle and install.