ProMasonry Cement Products

Data Sheet | SDS


ProMasonry Water Shield is a clear, water based, low odor, penetrating Alkoxysiloxane water repellent for concrete and masonry surfaces.

Spray apply to vertical and horizontal concrete, concrete block, concrete pavers, natural stone, stucco and brick.


  • Passes ASTM E514. Advanced silicone technology. Mitigates carbonation. Effective chloride ion screen. UV stable. Unaffected by microbiological activity.
  • Water vapor permeable.
  • Will not darken or alter light reflection of substrate when properly applied to a dry and untreated surface.
  • Repels water from penetrating substrate. Most damage to concrete, masonry and stone is due to water entry.
  • Meets all current VOC emissions for waterproofing concrete/masonry sealer.
  • Water based technology, low odor, easy handling and clean up.


  • Substrate must be clean and free of loose debris, oils, paints, previously applied water repellents or any substance that can interfere with penetration.
  • Substrate must be dry; moisture in substrate will reduce penetration.
  • Re-point loose or deteriorating mortar, fill all voids and cracks in mortar.
  • Inspect flashing around all openings, caulking, expansion joints and roof components to determine condition and for evidence of water entry. Water Shield will not prevent water entry through cracks or voids in the substrate or other building components.

Priming is not necessary.

Shake or stir until homogenous.


  • Always apply to a test area to ensure ProMasonry Water Shield will not affect the appearance of the surface due to reaction with previously applied materials or by drawing surface contaminants into the substrate.
  • For best results apply with a low pressure sprayer using a fan tip. For vertical applications begin at the bottom of the wall and work up generating a 4 - 6 inch rundown.
  • Work to natural break points in the structure.
  • Always keep a wet edge.
  • For horizontal applications begin at one edge and work backwards towards the opposite edge.
  • Apply enough material to saturate the surface, but do not allow material to pond. Brush out ponded material before surrounding area dries.

Protect from moisture and traffic for 8 hours. Material is fully cured in 14 days.

Clean tools, equipment and adjacent areas with water immediately after application. Clean glass with glass cleaner before material can cure.

1, 5 and 54 gallon plastic containers. 18 months in unopened containers. Protect from freezing. Transport and store in cool, clean, dry conditions in unopened containers. High temperature will reduce shelf life.


Physical state and appearance :
Milky liquid



Percent solids by weight:

Volatile organic content - VOC:
ASTM D3960 less than 50 gr./L

Density of liquid coatings:
ASTM D1475 8.4 lbs./gal.

Active Ingredients:
Siloxane based

Water vapor transmission:
ASTM E96 100%

Water penetration and leakage:
ASTM E514 100% reduction

Coverage will vary depending upon porosity of substrate. Concrete 150 - 250 ft.2/gal. Concrete block 40 - 175 ft.2/gal. Brick 100 - 175 ft.2/gal.


  • Ensure proper ventilation before beginning application.
  • Use NIOSH approved respirator, safety glasses, gloves and complete skin cover during application.
  • Do not apply if precipitation is forecast within 8 hours.
  • Do not apply to damp surfaces.
  • Do not apply unless substrate and ambient temperature are at least 40°F.
  • Do not spray in high winds. Always apply a sample to determine suitability to substrate.
  • Do not dilute.
  • Formulated to be a single application. Apply wet-on-wet for additional protection.


  • Product is alkaline.
  • Do not ingest.
  • Avoid breathing fumes.
  • Avoid contact with skin and eyes.
  • Refer to Material Safety Data Sheet (MSDS) for additional information.

If swallowed contact a medical professional immediately. Do not induce vomiting or give anything by mouth. Only induce vomiting if advised to do so by a medical professional. In case of skin contact, wash thoroughly with soap and water. For eye contact, flush immediately with a high volume of water for at least 15 minutes and contact a medical professional. For respiratory problems remove person to fresh air. If respiratory difficulty persists, contact a medical professional.

Dispose of material in accordance with local, state or federal regulations.

Conproco Corp. warrants this product for one year from date of installation to be free from manufacturing defects and to meet the technical properties on the current technical data sheet if used as directed within shelf life. User determines suitability of product for use and assumes all risks. Buyer’s sole remedy shall be limited to the purchase price or replacement of product exclusive of labor or cost of labor. August 2010 NO OTHER WARRANTIES EXPRESS OR IMPLIED SHALL APPLY INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. CONPROCO CORP. SHALL NOT BE LIABLE UNDER ANY LEGAL THEORY FOR SPECIAL OR CONSEQUENTIAL DAMAGES.