Patching large rigging tube hole.

[Mr. Demeanor]

This is something I have wanted to do and Ihad to take my back seat out today so I started on the patch. I glassed in a small piece of honeycomb composite to the underside and built up the glass then faired with P77. Looks great but I have one question before a spray the gel.
In the past when I have done this, awhile later I get a little shrinkage and an outline of the repair that has to be re-sanded and buffed. I assumed its the filler shrinking a bit over time. Should I wait a couple weeks before gel coating?

[XstreamVking]

PC 7 may not be a good filler to use under gell since gell is poly and has a very hi solvent content, and pc-7 is epoxy. Spray it and let sit. If it raises the filler edges, it may be solvent attacking the epoxy. I always used paint to finish epoxy surfaces.

[afr]

P-77 polyester filler and fairing compound offers the user a smooth workable paste with a set-fast cure to expedite those applications for repair or finish.
its not worth the money.
imo

[Mr. Demeanor]

PC 7 may not be a good filler to use under gell since gell is poly and has a very hi solvent content, and pc-7 is epoxy. Spray it and let sit. If it raises the filler edges, it may be solvent attacking the epoxy. I always used paint to finish epoxy surfaces.

Its P77 polyester filler by Adtech, not PC7 epoxy.

[XstreamVking]

Sorry for the mix up on products. I have had very poor results with the adtech p-77 myself. Every place I used it on a boat, bubbled up under the paint later and had to be repaired. Will never use it again......

[Mr. Demeanor]

Sorry for the mix up on products. I have had very poor results with the adtech p-77 myself. Every place I used it on a boat, bubbled up under the paint later and had to be repaired. Will never use it again......

Ive used it a lot without ever having an issue. The entire inside of my boat was faired with it when I pulled out the carpet and gel coated. The only thing I has was a little shrinkage when I used it to fill some holes.

[afr]

Sorry for the mix up on products. I have had very poor results with the adtech p-77 myself. Every place I used it on a boat, bubbled up under the paint later and had to be repaired. Will never use it again......

we had a issue one time as well and they would not stand behind the product

[albypine]

This is something I have wanted to do and Ihad to take my back seat out today so I started on the patch. I glassed in a small piece of honeycomb composite to the underside and built up the glass then faired with P77. Looks great but I have one question before a spray the gel.
In the past when I have done this, awhile later I get a little shrinkage and an outline of the repair that has to be re-sanded and buffed. I assumed its the filler shrinking a bit over time. Should I wait a couple weeks before gel coating?

No bad but open your repir area up just a touch more . For better feathering I all ways use a few layers of glass and found out it helps with the cold cock syndrome

[Mr. Demeanor]

Its hard to tell but its built up underneath. Coring with two layers of glass then cut circle of glass to fill in the hole then overlapped on top. I beat on it pretty good making sure it as strong enough because thats right where I get on and off the boat in the water. I actually put me knee in the middle of it and bounced up and down.
Between the glass and the coring I used under it its probably 3/4" thick. There are two layers overlapping on top.

[albypine]

That's should work. I all ways taper my repairs trying to us multiple layers of glass and never a issue . If accessible from underneath I will put a few layers for extra strength

[afr]

That's should work. I all ways taper my repairs trying to us multiple layers of glass and never a issue . If accessible from underneath I will put a few layers for extra strength

good boy just like i taught ya it works every time the object is t use as little puddy as possible

[Smoking Joe]

That's should work. I all ways taper my repairs trying to us multiple layers of glass and never a issue . If accessible from underneath I will put a few layers for extra strength