Would I be creating problems using West Systems 407 Low-Density filler to thicken my polyester resin? I have some imperfections in my plywood substrate I want to correct before I lay on the fiberglass mat. I'm not looking to add strength. I just do not want to have an area that the mat would bridge leaving a gap between the mat and the substrate.
Boat: Samson C-Falcon 41'9" composite ketch (designed by Cece Norris)
Re: Fiberglass Filler
1 the rule i know is the one i remmeber as a 'pyramid' - you can put one pack on 2 pack, but not the other way around.
2 you can extend 2 pack epoxy with glass balls (International Epiglas per exemplum), talcum powder, or cement. the latter are miles cheaper. and the mix gets stronger....