KILZ® Masonry Waterproofing Paint

KILZ® Masonry Waterproofing Paint

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KILZ® MASONRY WATERPROOFING PAINT is for interior / exterior use and is available in white or gray. It creates a waterproof barrier and stops up to 10 PSI of water pressure on structurally sound masonry. It provides a mildew resistant finish with low odor and easy water cleanup.

    White:Gallons, Fives- 390 - MSDS   |   KILZ Masonry Waterproofing Paint - TDS
    Gray:Gallons, Fives- 239141 - MSDS   |   KILZ Masonry Waterproofing Paint - TDS

Base Water
Int/Ext Int/Ext
Color White
Coverage - Low 75 sq. ft.
Mils Wet 21.3
Mils Dry 9.5
Coverage - High 125 sq. ft.
Mils Wet 12.8
Mils Dry 5.7
Finish @ 85o < 10
Min Application Temp 50oF (10oC)
Max Application Temp 90oF (32oC)
Dry To Touch 1 hour
Dry To Recoat 4 hours
Max Tint
*Tinting is not recommended for stainblocking applications
2 oz
VOC 99 g/L
Brush Nylon / Poly
Roller - Rough / Porous 3/4" nap
Volume Solids 44.3% (+/-) 2%
Weight Solids 62.4% (+/-) 2%
Viscosity 100 - 110 KU
Flashpoint N/A

  • Ideal for all interior and exterior porous concrete and masonry surfaces including basement and retaining walls, masonry walls, cinder and concrete blocks, stucco, brick, foundations and landscape walls.
  • Can be used on slightly damp surfaces. Do not use over oil or latex based paint
  • CAUTION: Not for use on floors. Sealed surfaces may become slippery. Use caution when walking over a coated surface.


  • New concrete must be completely cured (30 days).
  • Remove efflorescence, dirt, oil and grease. Clean with a concrete cleaner and degreaser.
  • Remove any mildew stains with a bleach and water solution or similar commercially available mildew remover, then rinse.
  • Etch the masonry surface with a concrete etcher when efflorescence is present.
  • Patch all cracks and holes with a fast-setting hydraulic cement.


  • Stir paint prior to use.
  • Use only when temperatures are between 50°F (10°C) and 90°F (32°C).
  • Apply with a high-quality nylon/polyester or other stiff synthetic filament brush or ¾” nap roller.
  • Two coats are required.
  • Coverage varies by surface. Coverage will be approximately 75 square feet per gallon on rough surfaces; up to 125 square feet per gallon on smooth surfaces.
  • IMPORTANT: If leaking is still present after two coats, it indicates that voids or pinholes are still open. Reapply product to these areas.

DRY TIME at 77°F (25°C), 50% RH
  • Dries to touch in one hour. Longer dry times are required in cooler temperatures or high humidity areas.
  • Recoat in four hours.
  • Full cure should be reached in 7-14 days.

  • Clean equipment and paint spatters with warm, soapy water.
  • If spilled, contain spilled material and remove with an inert absorbent. Dispose of contaminated absorbent, container and unused product in accordance with all current federal, state and local regulations.
  • To recycle or properly dispose of paint or primer in your community, call 1-800-CLEANUP.



Masterchem Industries LLC warrants customer satisfaction with this product for 10 years on vertical uncoated surfaces from date of purchase, when applied to a properly prepared surface in accordance with the label directions. Color fading and chalking will occur naturally over time.  If you are not satisfied with this warranty, Masterchem will, at its option and upon proof of purchase, either furnish an equivalent amount of new product or refund the purchase price. This warranty is made to the original residential product purchaser and is not transferable. Masterchem will not be responsible for (1) labor or cost of labor for the removal or application of any product or (2) any incidental or consequential damages, whether based upon breach of express or implied warranty, negligence, strict liability or any other legal theory. Some states do not allow the exclusion or limitation of incidental or consequential damages, so the above limitation may not apply to you. For information, write to Technical Service, Masterchem Industries LLC, 3135 Old Highway M, Imperial, MO 63052-2834, or e-mail Technical Service at techservice@masterchem.com. This warranty gives you specific rights and you may also have other rights which vary from state to state.


This product contains chemicals known to the state of California to cause cancer, birth defects, or other reproductive harm.




WARNING! IRRITANT! HARMFUL OR FATAL IF SWALLOWED. CONTAINS ETHYLENE GLYCOL. Avoid contact with eyes. May cause eye, nose and throat irritation. Avoid breathing of dust, vapors or spray mist. Open windows and doors or use other means to ensure fresh air entry during application and drying. If you experience eye watering, headache, or dizziness, or if air monitoring demonstrates vapor / mist levels are above applicable limits, wear an appropriate, properly fitted respirator (NIOSH / MSHA TC 23C or equivalent) during and after application. Follow respirator manufacturer’s direction for respirator use. Close container after each use. Wash thoroughly after handling and before smoking and eating.


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 log on to www.epa.gov/lead.


FIRST AID: If swallowed, do not induce vomiting. Get medical attention  immediately. If you experience difficulty in breathing, leave the area to obtain fresh air. If continued difficulty is experienced, get medical attention immediately. In case of eye contact, flush eyes immediately with plenty of water for at least 15 minutes and get medical attention.


KEEP FROM FREEZING. If frozen, let thaw at room temperature.



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