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can plastic solvent go bad ?

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  • Member since
    November 2015
  • 723 posts
can plastic solvent go bad ?
Posted by UNCLEBUTCH on Sunday, February 14, 2016 10:39 PM

I have a bottle of ''same stuff'' a little less then 1/4 , milky in color, that seams to have lost it's ump. Been working with wood for quite a while so can't remember how long its sat there. I don't have a new bottle to compaire it to.

Is it possible that its contaminated with ? I would have thought it would just evaporate in stead. Or is there a problem persay with the material i'm trying to glue. What do you think   ?

  • Member since
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  • From: Bradford, Ontario
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Posted by hon30critter on Sunday, February 14, 2016 10:38 PM

UNCLEBUTCH:

What materials are you trying to glue?

Dave

I'm just a dude with a bad back having a lot of fun with model trains, and finally building a layout!

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Posted by Anonymous on Monday, February 15, 2016 12:55 AM

Don´t really know. I have some plastic cement I bought 10+ years ago and I am still using it.

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Posted by UNCLEBUTCH on Monday, February 15, 2016 9:27 AM

hon30critter

UNCLEBUTCH:

What materials are you trying to glue?

Dave

part from old buildings for a kitbash, tyco and bachmann.
sometimes, the joint will soften but not weld, other times nothing atall.
I'll toss what little is left and get a new bottle, I was just wondering why

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  • From: Shenandoah Valley
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Posted by BigDaddy on Monday, February 15, 2016 9:37 AM

My Plastruct Plastic Weld from pre 1999 is clear but with just a tiny shade of yellow.  The price was $2.75

Henry

COB Potomac & Northern

Shenandoah Valley

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  • From: Chamberlain, ME
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Posted by G Paine on Monday, February 15, 2016 10:02 AM

Liquid cements are volatile, and will evaporate over time. If it has changed color, I would suspect something has gone bad.

George In Midcoast Maine, 'bout halfway up the Rockland branch 

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Posted by rrebell on Monday, February 15, 2016 1:02 PM

Every time you dip your brush in the solvent, you contaminate it a bit from the material you are working on, that being said you would end up with a solid at some point after enough evaporation but if it is still liquide it should still have some bite. I have my reservations about the same stuff being the same as pro-weld (going to miss that stuff), as it would work with more than styrene.

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  • From: Western, MA
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Posted by richg1998 on Monday, February 15, 2016 3:52 PM

I have to assume you are not using the solvent stuff for wood.

I use to use MEK and decant some into a small bottle. A little styrene, plastic might come back with the tiny brush I use. Never an issue.

It only evaporates if not tightly sealed.

 Rich

If you ever fall over in public, pick yourself up and say “sorry it’s been a while since I inhabited a body.” And just walk away.

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    January 2001
  • From: SE Minnesota
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Posted by jrbernier on Monday, February 15, 2016 7:18 PM
Micro Mark 'Same Stuff' is advertised as the same as Tenax 7R and Pro Weld. Considering yours is quite discolored, I would suspect it is contaminated. Both my Tenax 7R and Same Stuff are a clear-yellow in color
I only use a Sable brush with a wood handle for plastic cement application. Artificial bristles may 'melt' in that stuff!

Jim

Modeling BNSF  and Milwaukee Road in SW Wisconsin

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