Quick Steeli slike Miliput..two compounds taht you mix together like putty...then it sets liek rock....Isopon is liek a paste, which you mix with hardner...then apply it to what ever...fix teh parts together...wipe off the bits...then leave it a bit...with experience you can make it set real quick or slow depending on teh amount of hardner taht uou use...wipe off the excess witha wet finger, to keep it smooth...job done..
You may find tat somethig like Araldite will be better...maybe not..as I said Isopon is actually car body filler...its epoxy based tho...sets liek cincrete...you can drill it..tap it/...whatever yopu liek...im not familiar with JB weld, tho I have heard of it.