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Daily Quiz (20)


What is the name of the industrial form of hydrochloric acid that is used to clean concrete and masonry?


True or False? Some historic preservationists might object to the use of a clear, penetrating sealer on the masonry walls of an historic structure.


Why are elastomeric acrylics often selected for use on masonry walls?


True or false: Preservationists prefer penetrating sealers over coatings to protect masonry substrates on historic structures.


True or false: Film-forming coating systems on exterior masonry or concrete walls should not have any moisture vapor permeability.


Penetrating sealers are sometimes avoided by conservators on the masonry substrates of historic structures for what main reason?


Mineral paints used on masonry substrates use what type of binders?


True or false: The less permeable a coating for exterior masonry is, the more durable it is likely to be.


Which of the following product types is a water-repellant for masonry and concrete that penetrates pores, is breathable, and does not change the appearance of the substrate to which it is applied?


True or false: Ultra-high-pressure water jetting at 30,000 psi typically produces a lower volume of water in removing coatings from a masonry substrate than does pressure washing at 5,000 psi.


True or false: Non-film-forming coatings used as sealers on concrete and masonry cannot be pigmented to alter the appearance properties of substrates.


True or false: A coating system on an exterior concrete block wall must provide protection from wind-driven rain and, if moisture vapor diffuses from inside to outside, be sufficiently permeable to allow vapor to exit the wall.


True or false: Preservationists always prefer penetrating sealers over coatings on masonry substrates in work to preserve historic structures.


True or false: Clear, non-film forming masonry sealers, such as silanes and siloxanes, have little effect on vapor permeability, thereby allowing water vapor to exit the masonry substrate.


A crust of soluble salts, commonly white, deposited on the exterior of masonry facades, such as brick, is called what?


Why are clear, 100% acrylics often used on masonry facades?


True or false: Clear film-forming coatings do not typically change the appearance of masonry.


True or false: One hundred percent acrylic coatings are relatively resistant to alkaline substrates such as masonry.


True or false: Clear penetrating water repellents typically have a large influence on the vapor permeance of a masonry substrate.


True or false: Film-forming coating systems on exterior masonry or concrete walls should exhibit water vapor permeability or breathability.


 
 
   

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Corrosion Probe, Inc.
From Detection to Correction

Corrosion Probe, Inc. has the Most Concrete Coatings Experience and Expertise. Contact us today at
860-767-4402, www.cpiengineering.com


CS Unitec
Surface Prep & Material Removal

CS Unitec’s Floor Planers remove coatings & corrosion from concrete & metal surfaces. Produce keyed profiles for waterproofing applications. info@csunitec.com


NLB Corporation
Water jet surface prep, high or low

See how quickly HydroPrep® tools do surface prep, with no containment needed. Choose automated Crawler for overhead, Vortex™ for floors, or handheld VertaJet™.


Novatek Corporation
Dustless Coatings Removal

Strip it, clean it, and profile it,
all dust free! High production
rates and Blast like finishes.
Comply with new lead
standards.


Montipower, Inc.
The MBX Bristle Blaster

Get a 2.7 to 3.3 mil profile and a Near White Metal Clean. For info visit www.mbxit.com or call 877 629-8777


DeFelsko Corporation
PosiTector Inspection Kits

PosiTector 6000 Coating Thickness Gage easily converts to a surface profile gage, dew point meter or ultrasonic wall thickness gage with a simple probe change.


Polyval Coatings
Polyflex® Polyurea Linings

Polyflex ™ new Polyurea Geotextile Membrane System has been specifically engineered to protect the environment in containment applications.
www.polyflexlinings.com


Elcometer, Inc.
Durability & Design meet
Performance & Reliability

Elcometer 319 Dewpoint Meter
View the technical data on the Elcometer Dewpoint meter.


PreTox Products - NexTec, Inc.
GOT LEAD? Specify Pretox System products

The ONLY Lead Stabilizer Compatible with All Paint Removal Methods. Works with all Blast Media: Grits | Recyclable Abrasives | CO2 | Water | Power Tools | Etc. Call Dave Steffen at 800.338.8296.

 
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