this product 404 is perfect ,realy very strong, I used it to fill a big hole, and after that to cut a smaller hole,don\'t try to sand it it\'s very difficult. I mixed it with polyester resin because I wanted to put gelcoat paste.
Be sure to buy together with epoxy, then the resin will not pack a proper \ "putty \" with lots of powder \ r \ n \ r \ n \ r \ nlook out in bags and show up on the street \ r \ n ;-))) )))
I prefer to work with epoxy and microfibres. The consistency can be adapted to suit every purpose. I am very satisfied with the product, although the price of a few flakes in my eyes is a bit high.