Can you waterproof a basement from the inside?

Waterproofing a basement in the inside is a very popular option because it is done without major exterior excavation and, in some cases, can be done very quickly and economically.

How do you seal a concrete basement wall?

DO apply a masonry waterproofing product to bare interior basement walls. If your foil test showed that water is soaking through your basement walls and leaving them wet, seal the interior of the walls with a high-quality waterproof paint, such as DRYLOK White Extreme Waterproofer (available from Home Depot).

How do you waterproof a basement exterior wall?

Exterior basement waterproofing involves digging out the dirt around basement walls, applying a moisture barrier and installing a specially designed dimple board that deflects water away from the wall.

How can I waterproof my concrete basement?

Quote from the video:
Quote from Youtube video: There are products that you can paint on the interior of your foundation that will seal the foundation. So you actually put these on with a paint brush. And you apply them right to the concrete.

How do you waterproof the inside of a basement wall?

Apply a masonry waterproofing product to the walls

Seal/coat the interior of the walls with a suitable masonry waterproof product. When the paint dries, the sealant forms a watertight bond to stop water from seeping through. This is how you can waterproof your basement walls from inside.

Can You Use Flex Seal to waterproof a basement?

Flex Seal Liquid is thicker than paint and dries into a strong, rubberized coating. It can also help seal out air, water, and moisture and is chemical and mildew resistant – making it a great choice for your basement walls. Start by taping off the walls you will be waterproofing with blue painter’s tape.

When should you not use Drylok?

Don’t use Drylok on hollow block walls without drilling weep holes into the voids in the bottom course of blocks, or any water that makes its way into the block will exert hydrostatic pressure on the thinner walls of the block, potentially causing failure (it takes a lot less pressure to break 1″ thick concrete than 8″

What is the best product to waterproof basement walls?

When sealing basement floors and foundation walls the best concrete sealers to use are the Lithi-Tek 4500 primer followed by the Siloxa-Tek 8510 waterproofing sealer. If you are going to be installing flooring in the basement, it is best to use a moisture vapor barrier coating like the Vapor-Tek 440.

What can I put on my basement walls to stop water?

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Should you Drylock basement walls?

Of course, the reason you need to seal any basement foundation is because the foundation is porous. Moisture can come through the concrete, stone or block and cause a lot of problems under the house so sealing it is an integral part of the process in making sure your basement is clean and dry.

How can I waterproof my basement without digging?

Of course, there are situations where the best way to waterproof a basement is from the outside and exterior waterproofing work usually does require excavation.

What are the Alternative Methods that Don’t Require Outside Digging?

  1. Crack Injection.
  2. Interior Drain Tile.
  3. Sump Pumps and Back-ups.
  4. Crawl Space Encapsulation.

How do you waterproof a cinder block basement wall?

For the best method for sealing concrete block walls and the best cinder block water barrier, read on.

  1. Apply a Coating Directly On the Bare Wall. …
  2. Use a Breathable / Permeable Barrier. …
  3. Use a Weather-Resistant Elastomeric Layer. …
  4. Use “The Pink Stuff” …
  5. Repair Cracks and Fill Voids First. …
  6. Install an Air and Moisture Barrier.

Does Drylok work on concrete walls?

In case you don’t know, it is a waterproofing paint for your basement that works together with the pores in the concrete or brick walls. Drylok creates a sealed surface to prevent water from entering your home, thus completely preventing a wet basement.

Will DRYLOK stop leaks?

If your basement walls leak after a heavy rain, DRYLOK is only a very small part of the solution. Basements that leak after with heavy rain (or even melting snow) do so because their roof and surface drainage is not working.

Which is better DRYLOK or Zinsser?

Here we are at one of the most important differences. The waterproofing ability of Zinsser Watertite and Drylok will affect the purchase decision of many. In this aspect, Zinsser Watertite seems to be the better choice. As per its claim, it can withstand water pressure of 10 to 34 lbs.

What is the difference between DRYLOK and Drylok extreme?

The main difference is that Drylok Extreme has better water resistance than Drylok Original (15 PSI as opposed to 10 PSI). Drylok Extreme is wind resistant, includes biocide, and has a longer warranty. Additionally, the Extreme has a smooth texture, while Drylok Original offers a sandy texture.

Is Drylok extreme good for basement walls?

DRYLOK® Extreme Masonry Waterproofer is the perfect solution to stop water infiltration through basement walls, and it’s easy to apply.

What is the best waterproofing for concrete?


Polyurethane is considered one of the best waterproofing materials. It can be applied seamlessly and penetrates the surface deeply and evenly. Thus, the polyurethane membrane will fill in even the finest cracks in concrete, reducing its water absorbency capacity.