Wallpaper & Glue & Insulation...oh my.

[dwedeking2]

I know you said no epoxy but I used a two part epoxy filler from Total Boat for just this purpose. Spread it on with a putty knife and sanded. Then painted.

I love the result. Super easy to clean.

[Chotu]

Originally Posted by dwedeking2

I know you said no epoxy but I used a two part epoxy filler from Total Boat for just this purpose. Spread it on with a putty knife and sanded. Then painted.

I love the result. Super easy to clean.

Yes, absolutely great stuff. I always made my own with microbaloons.
However, with a pretty strong epoxy allergy I can't use the stuff anymore. So I'm hoping to find an alternative formula.

[aquarian]

Bondo marine. It's polyester based.

[Chotu]

Originally Posted by aquarian

Bondo marine. It's polyester based.

Exactly!

I have this. I also have polyester resin and fillers.

My concern is if the weave is a good enough mechanical bonding surface or not. Since polyester doesn't stick to epoxy, it's a nearly 100% mechanical bond. Will it hold up against getting banged into when I'm moving some heavy object and accidentally bang into a interior wall with it?

The hull is incredibly stuff so it doesn't flex at all. Assuming flexing won't work it loose since it doesn't flex. But it's a concern putting poly over epoxy.

Thoughts?

[Bigjim]

Originally Posted by Chotu

Exactly!

I have this. I also have polyester resin and fillers.

My concern is if the weave is a good enough mechanical bonding surface or not. Since polyester doesn't stick to epoxy, it's a nearly 100% mechanical bond. Will it hold up against getting banged into when I'm moving some heavy object and accidentally bang into a interior wall with it?

The hull is incredibly stuff so it doesn't flex at all. Assuming flexing won't work it loose since it doesn't flex. But it's a concern putting poly over epoxy.

Thoughts?

Most fibereglass boats are made with polyester resin. So Bondo would be a chemical bond for many boats. In fact, I have used epoxy over polyester several times where the bond has failed. West Systems tech support explained that I needed to prep the surface with unthickened epoxy first.

Any prep that hides the weave will require sanding unless you use some sort of material covering. Another aspect is that epoxy is inert once it is fully cured. I used a random orbital sander hooked up to my Shopvac to cut down on dust.

[Chotu]

Originally Posted by Bigjim

Most fibereglass boats are made with polyester resin. So Bondo would be a chemical bond for many boats. In fact, I have used epoxy over polyester several times where the bond has failed. West Systems tech support explained that I needed to prep the surface with unthickened epoxy first.

Any prep that hides the weave will require sanding unless you use some sort of material covering. Another aspect is that epoxy is inert once it is fully cured. I used a random orbital sander hooked up to my Shopvac to cut down on dust.

Right. That's the accepted way. But...

My hull is made of epoxy and I can't work with epoxy. At all.

It's a bondo (thickened polyester resin) over epoxy situation I'm looking at.