ProSeal for fore and aft seams

[Randy Hecht]

When I was in the Army working on assorted helicopters, we would use ProSeal 890 to seal seams on the airframe, transmission, and gearboxes seams or
mounting points. It never seamed affected by the UV rays, rain, or temperature changes or ranges we operated in. Outside of cost associated with
ProSeal, is there any issues with using it?

 

[6cuda6]

Is it rigid or flexible? How much stetch does it have before it shears?

It may be just fine but i would compare it specs to Dicor or SikaFlex just to be certain.
--
Rich Mondor,

Brockville, ON

77 Hughes 2600

 

[Randy Hecht]

ProSeal is flexible. The spec sheet can be found at https://www.aircraftspruce.com/catalog/pdf/09-38560-TechData.pdf

Chaplain Randy Hecht
Roswell, GA
Chaplains are ready to Listen when you're ready to talk.

1974 Canyon Lakes GMC the Unicorn Express
80mm Front Disc and a work in progress

>
> Is it rigid or flexible? How much stetch does it have before it shears?
>
> It may be just fine but i would compare it specs to Dicor or SikaFlex just to be certain.
> --
> Rich Mondor,
>
> Brockville, ON
>
> 77 Hughes 2600
>
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[johnny]

I wonder if the price reflects FAA approval. I'd ask the maker if they have a non-airworthy version available for less money.

--johnny
--
Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell

 

[Richard RV]

Randy,

There's no doubt that it's a high end product and that it would work. Most sealing failures are due to insufficient surface prep and not an
inadequate sealing material. With meticulous surface prep standard automotive/RV sealants work just fine for much less cost. Your money, your
coach, your call.

Richard
--
'77 Birchaven TZE...777
'76 Palm Beach with 18,477 miles on it.

 

[Randy Hecht]

Thank you. I’d rather do the prep work than spend the cash.

>
> Randy,
>
> There's no doubt that it's a high end product and that it would work. Most sealing failures are due to insufficient surface prep and not an
> inadequate sealing material. With meticulous surface prep standard automotive/RV sealants work just fine for much less cost. Your money, your
> coach, your call.
>
> Richard
> --
> '77 Birchaven TZE...777
> '76 Palm Beach with 18,477 miles on it.
>
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[Jim Hupy]

It is very important that all the old sealant is removed. The joint must be
rendered totally immobile mechanically, with mechanical fasteners. Screws
or click fast rivets work well. Then, non hardening sealant, not adhesive,
can bond to both surfaces, expand and contract without shearing, or leaking.
Jim Hupy
Salem, Oregon

On Sun, Dec 29, 2019, 8:04 PM Randy Hecht via Gmclist <

> Thank you. I’d rather do the prep work than spend the cash.
>
> > On Dec 29, 2019, at 10:37 PM, Richard via Gmclist <

> >
> > Randy,
> >
> > There's no doubt that it's a high end product and that it would work.
> Most sealing failures are due to insufficient surface prep and not an
> > inadequate sealing material. With meticulous surface prep standard
> automotive/RV sealants work just fine for much less cost. Your money, your
> > coach, your call.
> >
> > Richard
> > --
> > '77 Birchaven TZE...777
> > '76 Palm Beach with 18,477 miles on it.
> >
> > _______________________________________________
> > GMCnet mailing list
> > Unsubscribe or Change List Options:
> > http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
>
> _______________________________________________
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> Unsubscribe or Change List Options:
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>