KapaFix is made out of foam polyurethane on the inside, reinforced with a layer of aluminum on each side, while on the outside one side is surrounded by an adhesive sheet.
This construction makes it a very fast and affordable solution for those who want to present their photos.
The foam is resistant to solvents and glues. As long as it maintains its structural integrity it'll not absorb water. Keep in mind, however, that the outer surface is not resistant to water and moisture.
Available in 5mm and 10mm thicknesses.