3M "Piranha Putty" - and - Nitro Stan

[Keith Black]

For filling pinholes Lance Van Nostrand just introduced me to Nitro Stan Red
Putty 9001. It's available at auto paint supply stores (got mine at English
Color). This stuff can be bought in a one pound tube for 7 dollars (would
probably be enough for half a dozen planes). It's nice because it doesn't
have to be mixed with a hardener which means you can work at a reasonable
pace when filling pinholes over a large area without having to keep
re-mixing a lot of times due to it hardening.

It can be applied using a razor blade as a squeegee. Just spread it on as
thin as possible and it will fill all pinholes. The best thing about Nitro
Stan is that it's sandable in about 15 to 20 minutes and it's extremely easy
to sand, either wet or dry. After sanding all that remains on the plane are
the tiny dots that have filled the pin holes.

You could probably do an entire side of a fuse in and hour and a half
including drying time. I prefer to wet sand it because it doesn't make such
a big mess with dust blowing around. Wet sand using a paper towel to wipe up
as you sand.

I wouldn't use this for filling larger spots, but for pinholes it's awesome.

Keith Black

----- Original Message -----
From: "John Gausby" <humptybumpty at earthlink.net>
To: <discussion at seniorpattern.com>; <discussion at nsrca.org>
Sent: Wednesday, July 09, 2003 6:56 PM
Subject: 3M "Piranha Putty"


> Back in Jan 02 we got into a discussion on various hobby fillers and
substitutes that work well for filling pinholes ,fairing in clear canopys,
making wing fillets etc etc.. I copied a note sent by Buddy on "3M flowable
finishing putty" part#05824.
>
> Went to my local auto body supply shop last week and the above has been
changed to #05821 Piranha Putty. Same stuff....Comes in a 24 oz plastic tube
with a 1 oz. tube of hardener. Cost was about $17.00.
>
> NICE STUFF.....Lightweight micro balloon polyester. Sets up in about 5
minutes and ready to sand in about 20 minutes. You don't need much hardener.
Just follow the instructions and experiment a little with the hardener. It's
a nice alternative to Sig epoxylite and such. You DO need to work fast.
Smells and sets up like bondo.....What a name!!! Piranah Putty?
>
> F.Y.I. for you builders out there....Thanks Buddy!........John
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