SculpWood Moldable Epoxy Putty
Use to replace rotted, cracked, or chipped away wood
I don’t believe there is another product like this: an easily-worked epoxy-based putty that can be formed to fill large areas. Think JBWeld only for wood, and big. SculpWood putty cures in 4 hours, is very lightweight when cured and can be be easily sanded or otherwise abraded into the desired finished shape.
It’s part of a family of similar products which perform related tasks. I only have experience with the putty. A carpenter turned me onto it last year and we’ve used it since to clean up rotten and broken wood all around the house. It’s not cheap, but once you start using it it becomes pretty much indispensable.10/17/16