With a thick paint or paste-like consistency, brush-on liners adhere easily to metal truck bed floors while keeping away water and debris. And lastly, are the spray liners. This type is very similar to brush-on liners except, you use a high-pressure spray gun to apply them.
Ideally, you can have a professional do this for you to make sure it looks decent, or you can do it by yourself as long as you have the equipment. However, it is important to take note that brush-on and spray liners are hard to remove.
So, if you suddenly want to change them or have them removed, it might not be as easy. If you’re getting the last two as your bed liner, be sure that that is what you want for your truck.