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3m acryl putty

6/28/18       
Kevin Member

I just started working with this thinking it would dry faster and harder than the muralo spackle I usually use. It does dry fast and hard, but seems to shrink a lot. Anyone have the same experience? I have the white color, maybe the red or green behave differently?

6/28/18       #2: 3m acryl putty ...
Kevin

this is a glazing putty. it is intended for very small defects (such as pits in bondo). It should be applied super thin to super small defects. Dont try to fill a nail head in with it or you will be disappointed.

6/28/18       #3: 3m acryl putty ...
Adam

Its desiged for pinholes in filler and primer. Its will fill relatively(based on ones's own experience) wide and deep scratches.

The Muralo Pro grade green can spackle is excellent for nail holes. Screw holes need body filler.

We don't really get pinholes or scratches. More of an auto/marine problem. Fiberglass composites primarily.

6/29/18       #4: 3m acryl putty ...
Jim Clark  Member

Sounds like you are using a 1K putty, a
lacquer based one. Body shops don't use
that stuff anymore for those same reasons. Most everyone uses a 2K spot
putty these days, one that uses a hardener just like body filler.
They set quick, sand easy, and don't shrink.
Check out an auto supply for it.
I use one called "iceing"

6/29/18       #5: 3m acryl putty ...
Adam

Nitrostan, 3m glazing,acryl putty are for minor minor defects like pinholes. On a car when you throw on a coat of body filler it always has little air bubbles. Those need to be filled. On fibreglass boats there are likewise little air bubbles generally referred to as porosity. Then there are the typical little scratches that happen.

What finishing products are you currently using?

6/29/18       #6: 3m acryl putty ...
Kevin Member

Thanks, everything seems to check out. This stuff is great for very small defects, but too much shrinkage for anything like nail hole. I’m using it with post cat primers and cv’s.

6/30/18       #7: 3m acryl putty ...
Dean V Member

It does not sand as well as the bondo one part red spot putty. I was hoping it would since a white color would be nice. I don’t care for it.

7/2/18       #8: 3m acryl putty ...
Snaglpuss

If you are not liking the red color of the Bondo get yourself some white hardener.
We get it from the auto body supply shop.

7/11/18       #9: 3m acryl putty ...
Shane

We use the green 3m acryl after the first coat/guide coat of primer.... after this we primer prep and examine the piece and spot putty defects we missed in raw prep.... Obviously we use it for light cracks and small holes defects.... anything that has more defect we revert back to a bondo like material... the green really helps to know when it's filled and sanded correctly... then we hit it again with with a full round of primer coats to gain film thickness and re-prep for final topcoats... the spot putties are just that.. another tool in the box... use it were its correct and it's great.


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