if you look in the collectors forum, when bows are refinished.some have cracks in the risers. loctite 420 is used because it is a wicking type CA glue that will get down into the smallest of cracks. sometimes a syringe is used to get the glue into the crack. there must be a reason why, in some cases it's used over other CA glues. i can't bring myself to pay what is asked for a 1oz. bottle of glue and then to add insult to injury, be charged a ridiculous amount to ship that 1 oz. bottle. i think the main reason the 420 is used is because it is a wicking type glue that will get down into cracks that are .002 wide. if a hobby shop brand of ultra thin CA glue will get down into the tiny crack on my limb, i'll use it. some thing that another member spotted at this suppliers site that i didn't see is after you add the glue to your cart, a 25.00 shipping fee is added on top of the shipping charge. i never saw this. i'm glad he did. i thought i found a better price. i guess not. sorry. don