Forum Discussion
landyacht318
Jul 25, 2014Explorer
I hope that Polyester resin bonds properly with the plastic.
I would have wiped it with denatured alcohol first, then scuffed the plastic up nice and rough with some 36 grit paper for maximum "mechanical tooth". Sanding without removing possible contaminates first just pushes them deep into the grooves and can cause bonding issues.
Having a piece of clean cardboard to use as a "wet out" table, soaking the fiberglass patches with rounded corners first, then picking them up with gloved fingers and then laying in place, works better than laying the dry fiberglass on the area, then trying to saturate it in place.
If you can still see the weave of the cloth, then the fiberglass is not full saturated, and strength is compromised to some degree.
I would have wiped it with denatured alcohol first, then scuffed the plastic up nice and rough with some 36 grit paper for maximum "mechanical tooth". Sanding without removing possible contaminates first just pushes them deep into the grooves and can cause bonding issues.
Having a piece of clean cardboard to use as a "wet out" table, soaking the fiberglass patches with rounded corners first, then picking them up with gloved fingers and then laying in place, works better than laying the dry fiberglass on the area, then trying to saturate it in place.
If you can still see the weave of the cloth, then the fiberglass is not full saturated, and strength is compromised to some degree.
About Technical Issues
Having RV issues? Connect with others who have been in your shoes.24,380 PostsLatest Activity: Apr 15, 2026