Once cleaned, you can apply liquid rubber just like you would regular paint with a small roller or brush. You can also add a second coat for an extra layer of waterproofing. Allow the product to ...
Actual waterproofing starts with a coating like 422-B or nail polish ... superglue and baking soda, silicone rubber, liquid epoxy, paste epoxy (like J-B Weld), or even wax are all commented ...