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Tnemec Chemprobe Prime-A-Pell 200 is a clear, filmless, penetrating water repellent for virtually all above-grade, vertical concrete, stucco, block and brick masonry.


Product Data Sheet


GENERIC DESCRIPTION: Modified Siloxane with Diffused Quartz Carbide

COMMON USAGE: Concrete, stone and masonry treated with Prime-A-Pell 200 resist water intrusion, stain damage, freeze/thaw spalling, efflorescence and rust damage.

PRODUCT DISTRIBUTION: The treatment does not alter the color or texture of the surface, nor significantly affect the vapor transmission qualities of the substrate. The solution penetrates the substrate and chemically reacts to create a powerful barrier against water penetration. This barrier is resistant to ultraviolet and weather deterioration. Prime-A-Pell 200 is manufactured utilizing a process whereby defused quartz carbide and an oligomeric siloxane are coupled, then dispersed in a hydrocarbon solvent mixture. Prime-A-Pell 200 has been accepted by the United States Department of Agriculture as a coating for application to surfaces where there is a possibility of incidental food contact.

COLORS: Prime-A-Pell 200 is a clear liquid when applied, dries invisible, leaving the aesthetic appearance of the substrate unchanged.

PERFORMANCE CRITERIA: Contact your Chemprobe/Tnemec representative for specific test results.

LIMITATIONS: Prime-A-Pell 200 is not formulated for use on horizontal or below-grade surfaces. It is not intended to seal visible cracks or as a substitute for repointing defective mortar joints. A water repellent may not be able to completely resist winddriven rain on all substrates; two or more applications, applied wet-on-wet, may be required for adequate performance. 

The substrate should not be acid washed after application. Prime-A-Pell 200 may have limited efficiency on calcareous masonry such as limestones, marbles and travertines. The product is not appropriate for application to polished stone. Prime-A-Pell 200 must penetrate into and react with the substrate for effective repellency, therefore, it is not suitable for many painted surfaces. If both color and water repellency are desired, use Chemprobe’s Conformal Stain (Series 607) inconjunction with Prime-A-Pell 200.

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