ConTec CS-640


ConTec CS-640 sealer is an water-based emulsion of organomodified siloxanes/silanes. It is designed to give concrete tough, water-resistant properties. It excels on concrete roof tile and concrete pavements. ConTec CS-640 is proven effective on porous concrete masonry surfaces. Properly applied CS-640 aids in the prevention of moss and algae growth.


Spray systems should be airless type. There is no need to over apply. Only one coat is required. Apply only when substrate and ambient temperatures are above 64 degrees F. High volume users may consider buying CS-640 concentrate. Consult your ICT representative about our automated inline mixing units.


ConTec CS-640 is available in bulk quantities or packaged in 55 gallon (208 L) drums weighing 480 lbs (218 kg) and 265 gallon (1003 L) totes weighing 2360 lbs (1070 kg).


Specific Gravity at 77F…….…… ….. 1.00 – 1.02
Viscosity at 77F, cps ………… …..…. 100 max
Weight per gallon …………………. ….8.35 – 8.4
% Volatile matter (NVM(1)) ………… …… ~ 50


● Deep penetrating.
● Good water repellency.
● Fast Drying – Reduces Blocking.
● Improves durability and chemical resistance.
● Reduces efflorescence on concrete products.
● Self cleaning effect.
● Excellent price/performance ratio.
● Can be applied on dry or green concrete.
● Tolerates heat accelerated drying.


ConTec CS-640 can be stored over a wide range of temperatures but should not be allowed to freeze. Should ConTec CS-640 freeze, it will not thaw to a usable product. Provide adequate ventilation with use.


Application rates can vary, depending on surface, from 100 to 500 square feet per gallon. Typical roof tile application rates average 9 grams per square foot. Optimum coverage rates vary with geographic area and the texture and composition of the surface being sealed. Always consult your ICT technical representative for recommendations for your application.

Call and ask for technical assistance at 908-453-2737 or email info@bestadmix.com.

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