Although these decals have been stored correctly in a climate controlled, smoke free location, some of them are over 10 years old. I have not had any problems with usability of any of the decals, either by my customers or from my own personal use. But as with all older decals there is the possibility that they may have become brittle with age and will shatter when they are placed in the water. It is highly recommended that they be tested using an unused decal for this condition, or to be sure, coat the decal sheet with MICROSCALE liquid decal film before use. No guarantee of usability is given with these decals. No replacements, or refunds will be given for any decals that shatter upon use.