Related Clues:

• Warm and humid
• Awkward, as a situation
• Stuff on a stamp
• Mucilaginous
• Like glue or paste
• Post-it component
• Gluey, gooey
• Stuff that sticks
• Gluey, adhesive
• Glutinous
• Adhesive to the touch
• Adhesive, gluey
• Substance that sticks
• It sticks things together
• Hades, I've taken a stick to it!