Resealing a 225G half hex Aquarium???

[Niterunner77]

So I'm new to the forum and this is my first post/question. I have just recently came upon a 225G half hex aquarium that I picked up for a great deal and I want to reseal it.I have a 75G tank that I resealed about a year ago and it is doing great. The big question is do I go about it the same way? It's just a huge tank and I want to make sure it's done right because 225G of water on my floor would be a huge mess to say the least....