Clearing Water Repellents Roanoke VA

Architects and building owners in Roanoke select clear water repellents because they do not expect these coatings to alter masonry's natural appearance. But, if specifiers and applicators don't take care, the following seven factors can discolor a wall.

Townside Construction Co Inc
(540) 444-0555
608 S. Market St.
Salem, VA
 
Precision Home Improvements Inc.
(540) 314-7488
5615 Malvern Rd NW
Roanoke, VA
 
Structures Design/Build, LLC
(540) 774-4800
5104 Bernard Drive
Roanoke, VA
 
Central Vacs Unlimited, Inc
(540) 334-2067
PO Box 238
Boones Mill, VA
Services
Central Vacuum Installation
Membership Organizations
Roanoke and National Home Builders Association

ABSOLUTE INSULATION LLC
(540) 384-6800
8383 Arabian Lane
Catawba, VA
Services
Spray Foam Insulation
Membership Organizations
BBB, RRHBA,NRVHBA

Premium Steel Building Systems, Inc.
(540) 981-2483
1568 Granby Street, NE
Roanoke, VA
 
Bratton Masonry
(540) 597-3801
338 elm street
vinton, VA
 
House of Doors
(540) 765-2173
1390-C Southside Dr
Salem, VA
 
Serenity Construction
(540) 353-0952
sky lane
Blue Ridge, VA
 
The Engineering Groupe
(703) 670-0985
13580 Groupe Drive, Suite 200
Woodbridge, VA

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Clearing Water Repellents

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Source: MASONRY CONSTRUCTION MAGAZINE
Publication date: December 1, 1998

Architects and building owners select clear water repellents because they do not expect these coatings to alter masonry's natural appearance. Today, if a clear water repellent is carefully chosen, it is possible to ensure a clear finish. Pretesting on the actual masonry to be used helps in choosing the right coating. But, if specifiers and applicators don't take care, the following seven factors can discolor a wall.
  • Ultraviolet exposure. Water repellents containing organic resins that are unstable under ultraviolet (UV) exposure will discolor over time. Most manufacturers now use UV-stable resins.
  • Low water vapor transmission. The discoloration that usually occurs shortly after application is called "blushing."
  • Oversaturated substrate. Blushing often occurs if the wall is oversaturated when the water repellent is applied.
  • Chemical incompatibility with the surface. If the water repellent is not compatible with highly alkaline surfaces, the performance of some penetrating silicone-based coatings can be short-lived.
  • Incompatibility with previous coatings. Sometimes, reapplying the same coating years later may cause clouding.
  • Film formers. Unfortunately, when applied in sufficient quantity, most acrylics, stearates, and mineral gum waxes tend to darken the substrate's appearance or make it glossy.

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