To waterproof strengthen and preserve the overall appearance of your basement cinder block walls seal the blocks permanently against moisture and efflorescence with radonseal plus penetrating concrete sealer.
How to waterproof a concrete block wall.
The importance of waterproofing for concrete block.
Concrete blocks that are not protected and treated can suffer from severe damage over a period of time.
Let dry before proceeding.
With a stiff brush some tsp trisodium phosphate and some water wash away any loose material oil or dirt still clinging to the concrete.
You will often see efflorescence white minerals or mold growth on damp concrete.
Use a masonry paint brush to apply the first coat of sundry or drylok paint to the cinder block walls.
Water that enters through the pores can result to foundation seepage in the long run.
Thoroughly clean the surface of your concrete before waterproofing.
Allow to dry overnight or for a minimum of 12 hours between coats.
This paint will go on much thicker than standard wall paint.
Paint wall paint the cinder block wall with a thick coat of masonry waterproofing paint pushing paint into cracks and crevices of block.
They are generally absorbent and can easily absorb moisture that may cause mold problems.
A paint roller or brush made specifically for masonry is best.
Using your masonry brush dip into the paint and stroke in any direction on the wall covering the wall completely with paint including all crevices in the block.
Diy waterproofing solutions if the interior side of the concrete blocks continuously dampens or wet drain the water accumulated inside the hollow cores by drilling weeping holes in the bottom blocks 3 8 masonry drill and allow them dry out for four or more days dryer the better.