How To Seal Concrete Countertop. You can equal the seven-day strength of concrete cured at 70 degrees in one day when you heat your concrete to 120 degrees for 16 hours using portland type I cement Moist-cure your concrete properly prior to allowing it to dry. It is possible for concrete countertops to meet many and even all of these requirements to some degree.
Apply countertop sealer in similar fashion to first coat with an even coating and again back rolling to prevent roller marks. Dry for 20 minutes again. Accelerate the curing of your concrete with heat.
Allow to dry for 20 minutes then repeat the process to apply another coat.
Filling Seams in Concrete Countertops A few months ago I wrote an article about installation and I mentioned in there that you should use flexible caulk for seaming not rigid epoxy to allow for stress relief in case of slight movement of the slabs. Once dried these are the best sealants to cover all the areas you need covered. Allow to dry for 20 minutes then repeat the process to apply another coat. Countertop sealers are available in a range of sheen levels.
