This media is naturally water fast due to the nature of the laser printing process. There is no need to use a clear coat or sealant of any sort as the material is water fast straight out of the printer.
We highly recommend the clear ultra cling material partnered with our white window masking spray for creating interior car window decals. These decals are designed to be placed on the inside of the car window, with the viewer seeing through the window, through the clear adhesive, and then to the printed design. This not only protects the decal from outdoor exposure but the UV tinting on most vehicle windows will make your window decals last longer.
The picture on the left was printed in Minolta Magicolor 2300W and the one on the right on HP2550