Welding Putty heat sink

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I was wondering if any of you guys have used this stuff before. I was looking at a site the other day and they Had video of this putty in action. Cool blue or some thing like that, I was thinking this may be good when welding alloy to stop warp and distortion. Whats your thoughts?StuartAustralia
Reply:Have also seen http://www.muggyweld.com/coolblue.html but have not used.As for control of distortion, I'm thinking, for example, of TIG on thin stainless steel butt welds.  Since stainless has very low thermal conductivity, the heat does not spread rapidly or long distances anyway, so for this I think that minimizing heat input through welding technique may be more important than a heat sink putty next to the joint.However, as shown on the Cool Blue web page, in applications using a broad heat source such as a gas flame, the heat putty is effective.
Reply:I used putty before welding nipples on hydraulic cylinders. Reduces distortion. I don't remember what it was called. The stuff worked good.
Reply:Theres also a product called heat fence sold by eastwood automoyive and a few others.From my point of veiw its going to !!help!! stop wave distortions in the rest of the panel and or protect a surface finish outside of your cleaned and prepped weld zone.However I dont see it preventing a "Overall" warp in you workpeiceas theres still going to be metal shrinkage at the weld zone itself.Thats only going to be solved by planning your welds and your finishing procedure.In other words its going to help limit your HAZ but not get rid of it entirely