Pretty high-priced dope...
Yes it is, but it is in a small bottle with a brush under the cap. It wouldn't take up much space in a flight box. More of a convenience, sure, but how many people carry clear dope and a brush in their stuff? Again, for a quick repair that might keep you flying instead of heading home.
Ever buy a tube of touch up paint for a new car? Last one I bought years ago was 10 bucks.