Q&A: Waterproof your basement with DRYLOK® waterproofing agent (2023)

Q&A: Waterproof your basement with DRYLOK® waterproofing agent (1)

Q. Why should I waterproof my basement?

A. There are two types of holds, those that are already completed and those that - with a little elbow grease and a littleDRYLOK® – transform into perfectly usable living space. In any case, water intrusion (whether you're just feeling a little damp or seeing water and its effects) can erode your home's structural integrity, ruin your property, and encourage mold or mildew that can lead to health problems. .Q&A: Waterproof your basement with DRYLOK® waterproofing agent (2)

Q. How do I know if my basement needs to be waterproofed?

A. Some of the more obvious signs are water drips on the walls, puddles, actual flooding, or a lingering musty smell. Because water flowing through masonry takes the path of least resistance, be on the lookout for cracks in the walls or floor. However, sometimes the signs of water intrusion are subtle. If you look closely you can see stains on the floor or walls appearing as dark spots or lines of discoloration where water has seeped through. When water evaporates, it can also leave behind a white, powdery substance called an efflorescence. Efflorescence occurs when water migrates through concrete, brick and other masonry, dissolving natural salts and depositing them on the surface. These residues are a clear sign that moisture is present. Over time, efflorescence can even weaken the structural integrity of the material.Q&A: Waterproof your basement with DRYLOK® waterproofing agent (3)

(Video) Waterproofing Basement Walls | Finished & UnFinished Basement

Q. Are there other signs of wetness that I might be missing?

A. Occasionally, problems arise that most homeowners don't immediately attribute to a moisture problem: easy warping of wooden door frames, doors and windows that stick and are difficult to open and close, rusting of nails or other metal - like hinges, or even a sudden influx of insects such as centipedes or moths.Q&A: Waterproof your basement with DRYLOK® waterproofing agent (4)

Q. Is there anything else I can do to reduce the risk of moisture in my basement?

A. Yes, sealing the inside of the basement is just one piece of the puzzle. It is also important to keep water away from the base. Take steps to reduce the amount of groundwater around your home by keeping your gutters clean and making sure your gutters direct water away from your home. Check the spread ground cover to see if it has risen to the foundation - you don't want it to trap moisture around the house. In the same way, remove any fall leaves that have accumulated on the foundation - they also trap moisture and can contribute to potential problems. Finally, keep an eye on how water flows around your property and remember that it can change over time due to erosion, landscape maturation, and hardscape degradation.Q&A: Waterproof your basement with DRYLOK® waterproofing agent (5)

Q. How do I know if the moisture is from water seepage or condensation?

A. The air in our homes contains some level of moisture at all times. When there is too much moisture in the air, it reaches a saturation point and starts depositing droplets on different surfaces -- this is called condensation. If you have a condensation problem, using a dehumidifier is usually the best solution. If you have a water intake problem, that's a different story. To find out what type of moisture problem you are dealing with, take this simple test. Tape a 30 x 30 cm piece of aluminum foil to the floor or wall. After 24 hours, remove the foil from the surface. If the exposed side of the sheet is wet, it is condensation. If the wall side is wet, you have water ingress. If both conditions seem to be occurring at the same time, turn on a dehumidifier and continue with your waterproofing plans.Q&A: Waterproof your basement with DRYLOK® waterproofing agent (6)

(Video) How to Waterproof a Basement

Q. Why should I use aDRYLOK® sealing instead of sealing?

A. Sealants are inherently permeable and prevent water from penetrating masonry surfaces while still allowing internal moisture vapor to escape. A good example is closing a brick chimney to protect it from rain and snow.DRYLOK® impregnation works differently. They actually penetrate the pores and holes in the surface and bond with the brickwork to create an impenetrable barrier that protects you, your belongings and your home from water and moisture vapor that can pass through the brickwork.Q&A: Waterproof your basement with DRYLOK® waterproofing agent (7)

Q. Can I use the sameDRYLOK® waterproofing on walls and floors?

Dwarf. WhileDRYLOK® is available in multiple formulations with excellent performance on vertical surfaces (DRYLOK® latex-based waterproofing agent for masonry,Waterproofing DRYLOK® Extreme for masonry,DRYLOK® oil-based waterproofing agent for masonry, zDRYLOK® impregnation powder for masonry), OnlyDRYLOK® sealing for transparent masonryIt is approved for use on walls and floors. If you prefer color to the look of exposed concrete, simply apply the top coat.DRYLOK® Clean with high quality latex floor paint. If you want to lay vinyl, tile, wood or carpet, you can useDRYLOK® Transparent as a primer.Q&A: Waterproof your basement with DRYLOK® waterproofing agent (8)

F. WasDRYLOK® waterproofing should I use?

A. There are five different onesDRYLOK®, each with its own unique characteristics, colors and finishes:DRYLOK® latex-based waterproofing agent for masonry(10 year guarantee),Waterproofing DRYLOK® Extreme for masonry(15 year guarantee),DRYLOK® oil-based waterproofing agent for masonry(10 year guarantee),DRYLOK® impregnation powder for masonry, zDRYLOK® sealing for transparent masonry. For a smooth, brilliant white finish, choose Extreme with Green Wise® certification. If you prefer an off-white and grainy finish, go for the original latex. Do your homework and make sure you choose the formula that best suits your unique needs. If you would like instructions, please call1−800−272−3235to speak to customer service. We will be happy to answer your questions and show you the right way.Q&A: Waterproof your basement with DRYLOK® waterproofing agent (9)

(Video) How to Stop Water from Entering your Basement with DRYLOK® Masonry Waterproofer

Q. How do I properly prepare the masonry surface?

A. For the best possible adhesion, the surface must be clean and dry. Be sure to follow the surface preparation instructions on the can. Efflorescence should also be treated, but it takes more than soap and water to remove it from the wall. Since efflorescence is alkaline salt, remove with liquid or powderDRYLOK® engravingor hydrochloric acid, strictly observing the usage and safety guidelines.Q&A: Waterproof your basement with DRYLOK® waterproofing agent (10)

Q. What if the masonry is damaged?

A Fix it! After surface preparation, use quick cement such asDRYLOK® Fast Plug®for patching visible tears or holes (dries in just 3-5 minutes). To spot small cracks and breaks quickly and easily, lightly brush the surface with water and imperfections will become more visible. Also, carefully inspect any joints — where walls meet floor, ceiling, or other walls — , as these are where the greatest stress occurs and where cracks are most likely to form.Q&A: Waterproof your basement with DRYLOK® waterproofing agent (11)

Q. Do you have any helpful tips for applying?DRYLOK® waterproofing?

A. Use a good quality synthetic bristle brush, preferably one like ours.Pinzette DRYLOK®specially developed for transporting heavy body liners. And remember, since waterproofing needs to get into every pore and hole, load your brush with plenty of product and really work into those nooks and crannies. After applying the first coat, let it dry and repeat. You can use a brush or spray for the second coat, but if you're looking for a smoother, more even look, use a roller. Remember to always follow the directions on the can. To be eligible for warranty protection, you must apply at least two coats. If you are in decoration mode, you can always coat the surface with a high-quality latex paint or give it a different look after it has driedZAR® Oil-based multi-surface stainand a textured roller.

(Video) How to WaterProof your Basement walls

(Video) Waterproofing Basement Walls with DRYLOK® Paint -- by Home Repair Tutor


Is DRYLOK good for waterproofing basement walls? ›

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

How many coats of DRYLOK do I need for basement walls? ›

Apply coat number two using your choice of a roller, brush, or sprayer. A minimum of 2 coats is required for the fully transferable warranty to apply.

Does DRYLOK stop water leaks? ›

DRYLOK® penetrates tiny pores in the masonry to form a watertight coating that stops leaks. DRYLOK® will stop water from penetrating the inside of masonry walls even during the most torrential downpours.

What is the best product to stop water leaks in 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.

Can mold grow behind DRYLOK? ›

The product provides an 'inert coating' which means it does not promote the growth of mold or mildew. Additionally, Drylok Extreme consists of an additive called 'mildewcide' which acts to further prevent the potential for mold or mildew to grow under paint.

Do I need to primer before DRYLOK? ›

A. No, you need to remove any existing coating. DRYLOK® works by entering the pores of the masonry and expanding as it dries to become part of the wall surface. Q.

Does DRYLOK fill cracks? ›

DRYLOK® Pourable Masonry Crack Filler is formulated to fill and seal small cracks in concrete surfaces, sidewalks, walkways, steps, patios, garage floors, and more. It provides excellent adhesion, dries to the color of concrete and cleans up easily with soap and water.

What is the best product to waterproof basement walls? ›

The Best Basement Waterproofing Paint: DRYLOK® Extreme Masonry Waterproofer. Above and below grade masonry — including cinder and concrete block, stucco, brick and bare concrete swimming pools — are all examples of applications where DRYLOK® is ideal.

What are the problems with drylock? ›

In some cases the moisture will force its way through the cement and the Drylock and cause flaking of the product – similar to paint cracking and flaking. Even if you've used Drylock you will need to check for efflorescence; this is evident by sediment and white spots showing up on the walls and floor of the basement.

How do you permanently waterproof a basement? ›

Interior Waterproofing Your Basement Walls and Basement Floor
  1. Step 1: Clean the Area. First you'll want to clean up the areas you'll be waterproofing. ...
  2. Step 2: Plug Holes. ...
  3. Step 3: Fill Cracks. ...
  4. Step 4: Seal Openings. ...
  5. Step 5: Apply Waterproof Coating.

Can DRYLOK go over existing paint? ›

Yes and no. DRYLOK® may be used over any other cementitious-type waterproofing paint in good, repaintable condition, either inside or outside. However, DRYLOK® cannot be used over an oil or latex-based paint on the inside of a building.

How many coats of DRYLOK paint do I need? ›

Proper coverage, a minimum of 2 coats, is required to warranty waterproofing. After the second coat, carefully inspect the entire surface for pinholes. Give these areas an additional coat. If leaking is still present after 2 coats, it indicates that pores or pinholes are still open.

What is the cheapest way to waterproof a basement? ›

Paint: The easiest and usually least expensive option for waterproofing is painting the interior walls and floor of the basement with a waterproof paint. These paints are typically acrylic-based and adhere well while also creating a barrier against water.

How do professionals waterproof a basement? ›

Waterproofing a foundation from the outside typically involves using polymers and membranes to coat the exterior of the walls, installing a trench drain underground, or combining both methods. When done properly, exterior drainage can effectively waterproof a basement, but there are trade-offs.

Should I drylock my basement? ›

Drylok is an indoor waterproofing paint, and while that has been mentioned several times, it is a crucial detail. Waterproofing your basement from the inside may be cheap, but it is by far the least effective way of waterproofing your basement, and this is because it never stops the source of the water.

What kills mold on basement concrete? ›

The best solution is to scrub and clean the affected areas with a mold-killing detergent, like RMR-86 Instant Mold & Mildew Stain Remover, or a simple solution of household bleach and water. Be sure to scrub aggressively to get down into the pores of the concrete.

What kills mold on basement walls? ›

The best thing for removing mildew and mold from walls is a bleach/water solution. Mix one part bleach to three parts water and apply it with a sponge or rag. There are also a number of commercial solutions available at your local True Value hardware store.

How long will DRYLOK last? ›

The UGL Drylok Extreme system is guaranteed to work for up to 15 feet of head or water pressure and for up to 15 years. It is not a crystalline system—it's more paint-like—although the manufacturer states that it does penetrate the concrete.

What is the best paint to use over DRYLOK? ›

After applying DRYLOK®, wait at least 24 hours and then paint it with a good quality latex top coat.

Can DRYLOK go on wet walls? ›

DRYLOK® Wet Wall Bonding Primer is designed to apply to wet walls that never have a chance to dry out, or you don't have time to wait for a dry rain-free period. DRYLOK® Wet Wall Primer is to be applied directly over a wet masonry surface, not with active leaks but on a wet surface.

How long does DRYLOK need to dry before rain? ›

DRY TIME: To touch: 1 hour • To recoat: 6 hours • Heavy traffic: 24 hours • Rain free: 24 hours Note: Drying time may be affected by temperature, humidity and film thickness.

Does DRYLOK trap moisture? ›

DRYLOK® Waterproofers work differently. They actually penetrate pores and pinholes in the surface, bonding with masonry to create an impenetrable barrier that protects you, your possessions, and your home from any water and moisture vapor that could come through the masonry.

Does DRYLOK penetrate concrete? ›

Formulated with our exclusive SALTLOK® Technology, it penetrates into the surface and provides superior resistance to unsightly efflorescence stains (salt deposits) that are often visible on brick, block, and poured concrete surfaces.

Is DRYLOK good for foundation? ›

Foundation waterproofing systems

In areas that need only one waterproofing system, DRYLOK is a proven choice. If a two-part system is required, DRYLOK Masonry Waterproofer is an effective priming stage product. DRYLOK provides a seamless, penetrating waterproof layer.

How long does DRYLOK take to fully cure? ›

How Long Does Epoxy Paint Take to Dry and Cure? Depending upon the weather, regular epoxy coatings can take up to three days to fully cure for foot traffic, but DRYLOK® E1 Latex Epoxy paint is ready for heavy foot traffic in 24 hours.

Can DRYLOK go over old DRYLOK? ›

DRYLOK is not warranted when used over previously painted surfaces or on horizontal surfaces. DRYLOK EXTREME may be applied over surface previously painted with Latex Base DRYLOK Masonry Waterproofer or Oil Base DRYLOK Masonry Waterproofer.

What is the best Waterproofer for basement walls? ›

The Best Basement Waterproofing Paint: DRYLOK® Extreme Masonry Waterproofer. Above and below grade masonry — including cinder and concrete block, stucco, brick and bare concrete swimming pools — are all examples of applications where DRYLOK® is ideal.

Should you drylock your basement? ›

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.

What is the best thing to use waterproof basement walls? ›

What is the best way to waterproof basement walls? The best way to waterproof basement walls on a DIY basis is to fill cracks with hydraulic cement (opens in new tab), and apply a sealant designed for waterproofing basement walls, plus use silicone masonry caulk around window jambs.

How long does DRYLOK last? ›

Q. How long will DRYLOK® Masonry Waterproofer maintain its effectiveness? A. When applied according to directions, DRYLOK® Original Masonry Waterproofer is warranted for 10 years, DRYLOK® Extreme Masonry Waterproofer is warranted for 15 years, and DRYLOK® Floor & Wall Masonry Waterproofer is warranted for 7 years.

How do you prepare basement walls for DRYLOK? ›

DRYLOK paint should only be applied after you prep walls by cleaning them with a wire brush, removing salt deposits and sealing cracks and holes. Paint the walls when the temperature is at least 50 degrees Fahrenheit, optimally during a rain-free period when humidity levels are not high.

Is Drylock a good idea? ›

This “fix” can be an inefficient method to protect against moisture and could even lead to mold growth. In some cases the moisture will force its way through the cement and the Drylock and cause flaking of the product – similar to paint cracking and flaking.

How do you apply Drylok to basement floors? ›

If using a brush, work DRYLOK® Floor & Wall Masonry Waterproofer into the pores of the masonry. If rolling or spraying, back brush if necessary to fill in all the pores and pinholes. Give the first coat 3 hours to dry, and then apply a second coat using a roller, brush or sprayer (download our Spray Specs).

Is basement waterproofing worth it? ›

Waterproofing brings many benefits and is a great selling point to potential buyers. Basement waterproofing can lead to a return on investment of about 30%. Future homeowners will have peace of mind and know there they will have less chance of foundation damage and mold growth.


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