Superheroes are able to fight and do any number of highly physical activities while keeping their strapless masks on and their identities secret. This would lead me to believe they use an adhesive of some sort, yet they are able to quickly remove their masks and appear in civilian garb without any apparent residue around their eyes.
Since the answer could vary from character to character, I'll ask about a specific character:
How did Robin fasten those tenacious strapless masks to his face and how did he remove them?