Mikrosil for small molds

[ChrisBcritter]

I was just now watching an episode of Forensic Files; the investigation featured the use of a rubber product called Mikrosil for taking impressions of the murder weapon (knife blade). The product was a reddish-brown goo in a tube; it was able to take very fine details. Not cheap at $30.55 per tube but might be useful for some applications.

https://www.csiforensic.com/m7/%233-0100--mikrosil.html

Oddly, this strongly resembles a product sold by Bare-Metal a long time ago - Tom Piagari had a tube of the stuff that he used to take impressions of Cadillac emblems for me and he said he'd had it for a long time. It was also reddish-brown but was one-part rather than two-part.

[peteski]

I recall both Alumilite and Smooth-On carrying similar 2-part RTV putties. The come  in plastic jars. You kneed both parts together then press the object you want to take impression of into the putty. It then hardens to a rubber-like (Purple color) material.  Dentists also use similar (but less viscous) material to take jaw impressions for making crowns.

https://www.smooth-on.com/products/poyo-putty/

https://www.alumilite.com/silicones/mold-putty/

Then there is this https://www.michaels.com/amazing-mold-putty-kit/10410575.html  also from Alumilite ( https://www.alumilite.com/silicones/amazing-mold-putty/  ). 

 

There are also others (Google "silicone rtv putty").  Yes, they are all fairly pricey, but worth it when they are needed.

Edited August 14, 2021 by peteski