If the previous sealer is compatible you may be able to reseal without removing the previous sealer.
Sealing old concrete walls.
Sand clean dry may be used as a filler for cracks an easier approach if you are repairing an irregular crack in a floor.
The cement will expand inside the fissures and create a water tight seal.
Several types of topical sealants are available in prices that vary.
There are several steps to internal waterproofing the first of which involves sealing cracks and holes in the concrete walls of your foundation with hydraulic cement.
Strip any existing sealer from the surface.
Solvent based acrylic concrete sealers can be applied on top of previous solvent based acrylics.
We recommend using backer rods also if sealing wide cracks in concrete walls or floors but first you need to have those cracks evaluated to determine the cause as other important structural repairs could be needed first.
Following are some tips for applying concrete sealer properly.
Concrete or cement sealers protect bare and painted concrete floors while offering resistance to stains and chemicals so the surface withstands the test of time.
Driveway sealers can make your driveways last longer look new and give a boost your curb appeal.
Concrete is a porous material when fully cured.
To conduct a simple condensation test dry an area of the wall with a rag and then attach a one foot square piece of aluminum foil to the wall with duct tape.
Apply the concrete repair sealant to the affected area and smooth over with a putty knife.
You want to make sure all mold mildew efflorescence rust grease and oil are removed from the concrete before sealing as you do not want to seal these elements into the concrete.
Each step will have an impact on the final outcome.
Remove all oil grease stains dirt and dust from the concrete.
Waterproofing basement walls from inside.
Peel off the foil after 24 hours and.
Waterproof your concrete surfaces with a coat of concrete sealer.
But in order for a sealer to work it must be applied properly.
A concrete waterproofer helps make your home free of mildew and humidity indoors.
Follow the manufacturer s directions regarding dry time.
Any cracks or pitting will need to be filled in before applying the sealer.
It can also develop small pinhole openings that act as capillaries for water transmission.
A layer of acrylic or epoxy protects the concrete surface and it gives a high gloss and wet finish.
Unlike the penetrating sealers the film forming sealers wear out faster.
Here s a step by step summary of how to seal concrete.
Seal the entire concrete wall with a waterproof masonry.