DRYLOK® Extreme Masonry Waterproofer
Keeping a basement dry is a challenge even under the best of circumstances. I’ve written many articles on how to insulate them properly to prevent mold and mildew issues. Another consideration for keeping basements dry is preventing water vapor that’s trapped inside the foundation walls from migrating into the basement. Water vapor migration from the foundation wall can drastically increase the humidity levels and create an environment ripe for mold and mildew to grow.
DRYLOK® Extreme Masonry Waterproofer is a product that you can use to help reduce moisture from your foundation walls from making your basement into a humid jungle atmosphere. Recently I used DRYLOK® Extreme Masonry Waterproofer in the utility room of my basement. For this project I had two goals in mind including: keeping moisture and humidity levels low (the room houses our gas boiler, electrical panels, and our computer network gear) and also a brighter room.
DRYLOK® Extreme Features
- Ready mixed – Low-odor Formula
- Withstands 15 pounds of hydrostatic pressure, greater than a wall of water 33 feet high
- Breathable film – does not trap moisture in masonry
- 15-year Warranty
- Clean up with soap and water
- Applies easily with brush and/or roller
- Smooth / Bright White Finish
- Passes ASTM D-7088 Resistance to Hydrostatic Pressure and ASTM D-6904 Resistance to Wind Driven Rain.
- Tintable – available in white
One of the most important steps in any paint (coatings) project is surface preparation. Before applying the DRYLOK® Extreme Masonry Waterproofer on the foundation wall I thoroughly cleaned the concrete wall to remove dust, dirt and spider webs! I used a stiff broom to sweep off the bulk of the material from the wall and finished with my shop vacuum to ensure a clean starting surface.
After cleaning the wall I inspected the surface to be sure all the concrete was solid and sound. If you have large cracks or holes it’s best to plug them with hydraulic cement. DRYLOK sells their own version called FAST PLUG®. Be sure to follow the manufacturers recommendations for applying the cement.
Most concrete / masonry surfaces are quite porous and rough. So I highly recommend using a very stiff brush to apply DRYLOK® Extreme. I actually used brushes that DRYLOK sells which worked very well. The stiff brush allows you to easily apply the sealer and get it into all the pores. Your average concrete foundation wall may look quite smooth from a distance, but the minute you start applying any type of paint or sealer you’ll quickly realize there are many pores to fill.
For this project I applied two coats of the DRYLOK® Extreme Masonry Waterproofer. Two coats did a great job covering all the small voids and pores. I did see a couple spots that needed some additional coverage after the 2nd coat so I simply coated those specific areas with some touch up. DRYLOK® Extreme Masonry Waterproofer is much thicker than traditional paint resulting in less mess, but the application is quite a bit slower in my opinion, so leave plenty of time for applying this product.
I’m very happy with the results of the DRYLOK® Extreme Masonry Waterproofer. Now my mechanical room is definitely brighter (my plumber and electrician will appreciate that!) and the wall certainly has a robust line of defense against potentially damaging moisture in this room. This is absolutely a project any DIY’er can tackle and get excellent results. Keeping your basement dry will go a long way towards protecting your home from mold, mildew and poor air quality.
Priced at my local Home Depot for $32.98 per gallon, it’s an affordable solution that’s similar in price to good quality paint. So if you’re looking to dry out that basement, spruce up a laundry room, or brighten your man cave this is a product that will certainly help that effort.