Rating Newest Oldest. Best Answer: Air Brakes are included as part of a CDL-A so a seperate endorsement is not required, but for a CDL-B or lower, If the vehicle you will be driving is equipped with air brakes, then you need an air brake endorsement.
The Color Sealer is an Acrylic Resin that has a chemical reaction with the grout that hardens in the pores and dries to a natural look and feel. The constant acting mildicides provide a sanitary grout line surface. It colors and seals in 1 bottle. Easily wipes off tile surface when applying.
A. Grout does not have to be sealed, but without some sort of protection the grout will begin absorbing dirt and grime immediately after installation. Grout is porous; it will absorb stains even with regular mopping. This can leave the grout looking unevenly colored ruining the look of an installation.