Hollywood Jim Posted May 25, 2013 Share Posted May 25, 2013 Here is information form the Bondo website. They have one part putty. Bondo 907. I use the two part putty. Bondo 801. I think if you use one part putty of ANY kind, and you apply paint over it before it is completely dried; it will shrink. One part putty applied in thin coats will not shrink if it is allowed to completely dry before you paint over it. But to be safe I use 2 part putty so i don't have to worry about how thick I apply the putty. . Quote Link to comment Share on other sites More sharing options...
Harry P. Posted May 25, 2013 Share Posted May 25, 2013 If it says "Professional" in the name, it's the 2-part stuff. Bondo "Professional" Glazing and Spot Putty. You have to be careful because their 1-part stuff comes in an almost identical looking package. Quote Link to comment Share on other sites More sharing options...
sjordan2 Posted May 25, 2013 Share Posted May 25, 2013 I would assume that the 2-part putty discussion has mostly to do with bodywork and very visible parts. I don't see a downside to using 1-part putty for things like covering seams, sink marks, etc., in engine block halves, radiators, drive shaft halves, bell housings (where appropriate) etc. Quote Link to comment Share on other sites More sharing options...
Hollywood Jim Posted May 25, 2013 Share Posted May 25, 2013 I think the history of shrinking putty comes from building models in our younger years. When I was a young boy I used to slop on the one part tube putty in thick clumps when doing body work. Then as soon as I could sand it, I would sand it. Then right after sanding it I would paint it. Just like most kids I was in a hurry to finish the model. And sure enough the putty would still be curing and a few weeks / months later it would show signs of shrinking. . Quote Link to comment Share on other sites More sharing options...
Danno Posted May 25, 2013 Share Posted May 25, 2013 Late to the game . . . Hey, Jim, Does the 801 come with hardener in the package or do you have to buy it separately? (See you this afternoon!) Quote Link to comment Share on other sites More sharing options...
Harry P. Posted May 25, 2013 Share Posted May 25, 2013 In the package. Quote Link to comment Share on other sites More sharing options...
Hollywood Jim Posted May 25, 2013 Share Posted May 25, 2013 Late to the game . . . Hey, Jim, Does the 801 come with hardener in the package or do you have to buy it separately? (See you this afternoon!) I brought it sometime more than a week ago so I don't remember..... LOL A tube of this stuff lasts me a long lone time. A few years ago I even had to purchase some extra hardener. Yeah, see you later today !! . Quote Link to comment Share on other sites More sharing options...
Danno Posted May 25, 2013 Share Posted May 25, 2013 In the package. As McAuliffe and Patton said to von Luttwitz: "T'anks." Quote Link to comment Share on other sites More sharing options...
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