For those that loved Sealtex and are missing it in the UK.. this is for you!! 
 
Self-adhesive, well-adhering bit bandage that reliably protects the horse's mouth from friction.
 
Soft, self-adhesive foam tape for winding around the horse bit, especially the bit edges
Offers ideal protection for your horse in the event of chafing or other problems
Easy to put on
Adapts flexibly to the horse's mouth without slipping
Contains natural latex