Sauereisen Underlayment No. F-120 is a fast-setting, high early strength, Portland-based resurfacing material available in three formulations - Trowelable, Castable, or Gunite. Selection of material is dependent upon concrete condition and whether application is on vertical, horizontal or overhead surfaces.
Where concrete deterioration is less than 1/2 inch depth and on vertical or overhead surfaces, Underlayment No. F-120 Trowelable is recommended for resurfacing to pre-existing planes, establishing elevations, or patching substrate voids or irregularities which can affect performance of chemical-resistant lining systems. For those areas that exceed 1/2 inch of deterioration or where troweling would be cost prohibitive, Underlayment No. F-120 Castable or Gunite grade is recommended depending on the preferred method of application.
Underlayment No. F-120 is mixed with potable water for a safe, easily applied, fast-setting material. Installation of a chemical-resistant lining may proceed after five (5) hours at 70°F of No. F-120 application, minimizing downtime.