Ultra Cure is a very high performance clear cyanoacrylate that has a viscosity (thickness) in-between that of Insta Cure Super Thin and Insta Cure Plus Gap Filling Medium. It is ideal for the mounting of rubber tires onto R/C car wheels. It is available in our 3/4 oz Pocket CA bottle. ULTRA CURE can be used in many other applications that require a slightly thicker than CA and will bond virtually everything. It is NOT foam safe.