Surface to be coated should be clean and dry. Remove all dirt, grease, oil, wax, mildew, and excessive chalk or form release agents and efflorescence from the surface. High pressure washing is recommended to remove dirt and open up the pores of the concrete. Reasonable effort should be made to repair all loose or missing mortar, flashing, vapor barriers, expansion joints, etc.

Surface to be coated must be clean and dry. Apply by flood coat, using a low pressure airless, pump up sprayer or power roller. DO NOT ATOMIZE. Best results are obtained when the product is applied in the form of droplets rather than mist. Surfaces must be "flooded/saturated" allowing the material to run down 6 to 12 inches from the point of application. Vertical block and brick must be saturated with the material at the proper coverage rate in one heavy flood coat, or two coats wet on wet. If the material is not applied at the proper coverage and is allowed to dry, the material must be re-applied at the proper square footage, and not ":touched up". Always work from the bottom up to insure complete coverage. A Rilem Take up tube test should be performed before and after a mock up application to determine proper coverage rate needed to achieve water repellency.

• Not for use below grade. May inhibit over coating. Will not "bridge" cracks or spaces wider than 1.2 mm.
• Do not apply at temperatures below 50 degrees F. Silane 20 will not inhibit water penetration through cracked, or unsound surfaces, or surfaces with defective flashing, caulking or structural water proofing design