DRYLOK® Pro Masonry Waterproofer

DRYLOK® PRO Masonry Waterproofer

DRYLOK® PRO Masonry Waterproofer is GUARANTEED to protect new construction AND stop water that’s leaking through existing masonry. Ordinary paint just lies on the surface and can be forced off by water pressure. DRYLOK® PRO actually penetrates the pores in the surface, bonding to the masonry to create an impenetrable barrier.

At UGL, our team understands you put your reputation on the line every day, and that the products you use and the partners you choose can help set your business apart from the competition.

We proudly stand behind our high quality, American-made products and are 100% committed to providing you with quick quotes, responsive customer service, and expert technical support - on the phone, via email, and in the field. Call 1-800-845-5227 or email us today!

DRYLOK® PRO Masonry Waterproofer Application
18 Year Warranty Stops a wall of water 33 ft high Certified By Green Wise Resists Wind Driven Rain

Quick Overview

Waterproof interior, exterior, above or below grade walls including commercial buildings, parking garages, patios, balconies, basements, retaining walls, bare concrete swimming pools, foundations, and more.

  • GUARANTEED to stop water – withstands 15 pounds of hydrostatic pressure (PSI), equivalent to a wall of water 33 feet high
  • Fully transferable 18 Year Warranty, valid on residential and commercial projects
  • Helps protect against radon gas penetration by reducing vapor transfer
  • Green Wise® Certified - meets or exceeds the VOC requirements of LEED® for most applications
  • Low-odor formula complies with all current VOC requirements
  • Breathable film will not trap moisture in the masonry
  • Easy cleanup with warm, soapy water

Product Features:

  • Tintable, bright white, smooth finish formula features Flexible Encapsulated Polymers for the ultimate in waterproof protection
  • DRYLOK® PRO Masonry Waterproofer features an expanded tint palette of beautiful decorator colors. If your job includes basement remodeling, consider suggesting Lilac, Buff, Cool Melon, Khaki, Olive, Sage, Cement Gray, Midnight Gray, or Twilight. Protecting stucco? Try one of these six attractive tints: Butter Cream, Adobe, Basically Beige, Clay, Coral, or Peach. Waterproofing a pool? Make an impression with Aqua Marine, Caribbean Blue, or Spa Blue.
  • Incorporation of a green biocide helps the dry paint film resist mildew growth
  • Sizes: gallon, 5 gallon
  • Coverage: 75-100 square feet per gallon
  • No pre-mixing or pre-wetting
  • Application tools: brush or roller (preferred for first coat), sprayer
  • Dry time: 1-2 hours
  • Coats: minimum of 2 for Warranty Coverage to apply
  • Recoat time: 3 hours
  • After 24 hours, DRYLOK® will accept a decorative topcoat using a good quality latex paint



  • Masonry walls
  • Brick
  • Stucco
  • Cinder and concrete blocks
  • Poured concrete

Ready-Mixed Colors

White Bright White

Please note, colors are RGB web approximations of the actual shades.

Standard Tints

Beige Beige
Blue Blue
Buttercup Buttercup
Gray Gray
Mint Green Mint Green
Platinum Platinum
Sand Sand
Slate Blue Slate Blue
Soft Pink Soft Pink

Please note, colors are RGB web approximations of the actual shades.

LOWE'S® Exclusive Tints

Lilac Lilac
Buff Buff
Cool Melon Cool Melon
Khaki Khaki
Olive Olive
Sage Sage
Cement Gray Cement Gray
Midnight Gray Midnight Gray
Twilight Twilight
Butter Cream Butter Cream
Adobe Adobe
Basically Beige Basically Beige
Clay Clay
Coral Coral
Peach Peach
Aqua Marine Aqua Marine
Caribbean Blue Caribbean Blue
Spa Blue Spa Blue

Please note, colors are RGB web approximations of the actual shades.

How To / Videos

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

See more Home Improvement Videos



DRYLOK® PRO Masonry Waterproofer may be applied on a slightly damp surface, but best results are obtained when the surface is dry, clean and free of grease, oil, form-release compound, and paint. Remove dust, dirt, and any loose or broken mortar with a wire brush. Old paint in poor condition should be removed by wire-brushing, sandblasting or other suitable methods.* If you see white, powdery, crystal-like deposits on the surface, they are naturally-occurring, water-soluble salt compounds in the masonry, pushed out by water intrusion. When the water evaporates, the salt residue remains. This effect is called efflorescence and, because it prevents DRYLOK® PRO Masonry Waterproofer from properly bonding to the surface, it must be removed. Treat it with DRYLOK® Etch** (liquid or powder formula) or muriatic acid according to the manufacturer's directions, rinse, and allow the surface to dry. Since efflorescence occurs naturally, we cannot warrant against it reoccurring.

Patch all cracks and holes with DRYLOK® Fast Plug®. Wet the surface to be patched. Next, back chisel the areas to be patched in the shape of an inverted “V” so DRYLOK® Fast Plug® can better anchor into the wall. Apply and smooth the patch so it's even with the surface around it. As DRYLOK® Fast Plug® sets rapidly, mix only what you'll use in 3-5 minutes. Also, be sure to seal the area where the floor and wall meet. Often, when concrete floors cure, they shrink and pull away from the wall, creating a space where water can enter.


Schedule your project when both air and surface temperatures are 50°F or higher and, for best results, wait for a dry (rain-free) period. Stir DRYLOK® PRO Masonry Waterproofer thoroughly before and during application - do not thin. Apply the first coat to bare masonry with a three-quarter-inch nap roller, a DRYLOK® Brush or a quality nylon bristle brush. If using a brush, work the DRYLOK® PRO Masonry Waterproofer into the pores of the masonry, making sure to fill all pores and pinholes. If using a roller, back brush the first coat to fill all pores and pinholes. Give the first coat three hours to dry, and then apply a second coat using a roller, brush, or sprayer (download our Spray Specs).

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. Paint these areas again. When painting the inside of concrete fish ponds and non-potable water tanks, allow DRYLOK® PRO Masonry Waterproofer to dry for at least 1 week, then fill with water.


Dispose of contaminated absorbent, container and unused contents in accordance with local, state and federal regulations.

Fully Transferable 18 Year Warranty

United Gilsonite Laboratories (UGL®) warrants DRYLOK® PRO Masonry Waterproofer, when applied according to directions on a properly prepared bare masonry surface, will provide a waterproof coating for eighteen (18) years from the date of application, warranty includes subsequent owners. There are no other warranties that extend beyond this warranty. This warranty shall not apply when the waterproofer fails due to improper product application, failure to follow label directions, inadequate surface preparation, cracked structural surfaces, reoccurring efflorescence or any conditions not foreseen by UGL. Two coats of DRYLOK® PRO Waterproofer are required to ensure warranted waterproofing. Label directions are as complete as possible, but cannot encompass all conditions, applications and/or surfaces. In the event that the coating fails, your remedy is limited to either replacement of the product purchased or refund of the purchase price. This is the exclusive remedy. For warranty fulfillment, return used product container and sales receipt to UGL, Technical Customer Service, 1396 Jefferson Ave., Dunmore, PA, 18509. THIS LIMITED WARRANTY EXCLUDES ALL OTHER EXPRESS OR IMPLIED WARRANTIES, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE OR PURPOSE. UGL will in no event be liable for any incidental or consequential damages. Some States do not allow limitations on how long an implied warranty lasts or the exclusion or limitations of incidental or consequential damages, so the above limitations or exclusions may not apply to you. This warranty gives you specific legal rights, and you may also have other rights which vary from State to State.

USAGE STATEMENT: Prior to use, carefully read the product label and follow the directions. For technical information, warnings, cautions, notices, and additional information, download and read the documentation available on this website.

* WARNING: If you scrape, sand or remove old paint, you may release lead dust. LEAD IS TOXIC. EXPOSURE TO LEAD DUST CAN CAUSE SERIOUS ILLNESS, SUCH AS BRAIN DAMAGE, ESPECIALLY IN CHILDREN. PREGNANT WOMEN SHOULD ALSO AVOID EXPOSURE. Wear a NIOSH-approved respirator to control lead exposure. Clean up carefully with a HEPA vacuum and a wet mop. Before you start, find out how to protect yourself and your family by contacting the National Lead Information Hotline at 1-800-424-LEAD or visit www.epa.gov/lead.

** When using DRYLOK® Etch®, wear eye protection with side shields, chemical-resistant gloves, protective footwear and suitable clothing.