Fills gaps. Some uses besides hobbies and crafts include; jewelry manufacturing and repair, taxidermy, pool cue tips, darts, archery, knife making, mold and pattern making, furniture refinishing and antique repair, and for fishing, fly line splicing and fly tying.  Allows 7 to 10 seconds for positioning.  Works best on most plastics, pottery, rubber, veneer, wood, aluminum, ceramic, leather, fiberglass and metal.