Hahnemühle offers a protective spray and various conformal coatings for canvas prints:
Developed specifically for the Hahnemühle Canvas grades, Varnish Protective Lacquer increases lightfastness and makes the surface of the prints water repellent. The fast-drying varnish is ready to use mixed and easy to apply with a foam roller.The water-based Varnish enhances the color of pigment and Ultrachrome inks and protects your prints from "drifting" of the paint.The Varnish also protects against "whitening" of the Canvases and leaves a crystal clear coating after drying the job.
Hahnemühle Varnish is available in three variants. You can choose between a glossy, semi-matt or matt finish. The Hahnemühle Protective Spray protects FineArt prints from dirt, fingerprints and moisture and increases UV stability.