The white powdery substance is efflorescence, and you want to neutralize it with DRYLOK Etch which is much safer than muriatic acid. Above all, remove efflorescence prior to waterproofing to avoid the waterproofer from failing.
Since efflorescence is an alkali salt, remove it with liquid or powder DRYLOK® Etch or muriatic acid, paying close attention to usage and safety guidelines.
Painted surfaces already damaged by efflorescence must NOT be repainted until the source of the moisture is identified and eliminated or blocked (by waterproofing). It may be necessary to engage the services of a qualified waterproofing specialist.
If you have a wall that has chronic water leakage, you should not apply DRYLOK® Masonry Wateproofer because it will not properly cure.
Efflorescence appears as a result of salt being pushed to the surface of masonry. It's a painting issue that's easily overcome by the use of Zinsser Watertite®.
Once the water source is eliminated, most efflorescence (also called Calcium Carbonate or limestone) can be removed with abrasive techniques. Dry brushing, light water blasting or light sandblasting followed by flushing with clean water. In large areas, rotary scrubbers with scrubbing pads may also be used.
In these cases, water repellency is critically important. In these situations, use LastiSeal Brick & Concrete Sealer for an unbeatable 15-years of protection, or go for DryWay Water-Repellent Sealer, which is a DOT approved silane/siloxane water-repellent. Efflorescence is a very common and controllable condition.
The problem with Drylok is not price, it's performance. As we've established (and Drylok admits), Drylok isn't really a waterproofing material, it doesn't adhere to concrete, it doesn't block out moisture, and still requires more material to cover less space.
Superior Waterproofing Performance: Crystalline Waterproofing offers a higher level of waterproofing performance compared to Drylok Extreme. Its crystalline technology penetrates into the concrete, forming insoluble crystals that block capillary pores and microcracks, effectively preventing water penetration.
No, DRYLOK® will act as the primer for any good quality latex paint.
Clear water repellents, silicone and acrylic coatings also may help you remove efflorescence as well. The coating will absorb water across a masonry surface and prevent efflorescence from recurring. Plus, the combination of warm water and white wine vinegar has been shown to eliminate efflorescence.
The acidity in the vinegar helps remove the efflorescence and calcium deposits by breaking down mineral crystals. After cleaning the surface, let dry for 48-72 hours (moisture content below 25%).
Once the surface is completely dry, you can apply SEALTIGHT or ULTRA MASONRY BLOCK SEALER to waterproof the surface and help keep efflorescence from forming again in the future.
Efflorescence Effects
Besides, deposits might grow and cause adhesion problems, if not properly removed before repainting. Other effects are physical damage to the structure and property value's reduced value.
The damp is the problem that is causing the flaking, and therefore the sealant will simply get wet again and start to come off. The real issue is that your home is not properly waterproofed. If it was, moisture would not get trapped in your interior foundation walls at all, and could not cause the flaking.
Remove dirt, dust, grease and oil by washing with a detergent solution or DRYLOK® Concrete Cleaner & Degreaser*. Allow the surface to dry before applying DRYLOK® Etch. To remove efflorescence, clean mortar or etch galvanized surfaces – dissolve 12 ounces of DRYLOK® Etch in 1 gallon of water.
This product is acrylic resin based that penetrates deeply into the concrete and seals it. It does not "bead" water as it's not a silicone or wax based product.
A minimum of 2 coats is required for the fully transferable warranty to apply. Now, inspect the surface for any remaining pinholes and fill them in. If it still leaks, a random pore or pinhole is still open.
Customers say that Drylok Extreme is a highly effective waterproofing solution for basement walls, offering excellent coverage and ease of application. Many users appreciate its thick consistency, which helps seal porous surfaces, and the low odor during application.
The application of DRYLOK® Wet Wall Bonding Primer will minimize the reoccurrence of efflorescence when the surface is properly treated. Patch all holes and cracks with DRYLOK® Fast Plug®.
DRYLOK® Waterproofer not only repels water but also inhibits the growth of mold and mildew. By creating a hostile environment for these harmful microorganisms, DRYLOK® ensures a healthier living space for you and your family.
You can use DRYLOK® Floor & Wall Masonry Waterproofer on floors and walls. It holds up to foot traffic as a finished coat and can be used before applying floor paint, or latex-based adhesives.
100% solids Vapor Barrier Epoxies may help to hold back efflorescence as they are engineered for high tolerance to chemical attack. Their performance will be predicated on how well they resist degradation from the highly caustic solution stemming from the water and soluble salt solution.