SEARCH SCALEAUTOMAG.COM

Enter keywords or a search phrase below:

Strengthen molds with wheat flour

Tip: I use Permatex Red Hi-Temp RTV to make molds for casting resin, and I’ve found that this RTV hardens much faster if you mix it with wheat flour at a ratio of roughly 20 parts RTV to one part flour.  

The flour has enough moisture to allow thicker (at least 5mm) RTV molds to harden. The resulting mold is stronger than regular mold rubber, and can stretch somewhat without tearing.  Fine sawdust may also be used in place of the flour for additional stiffness of a final coat. I’ve only done slush or solid casting, but a thin cast of a smooth suface can be made by placing fabric (I use old pajama poly/cotton) in the mold and then pouring just enough resin to soak the fabric (smooth out any bubbles). This also adds much strength to the casting.  
                                     
 – “gdbcnielsen”
via E-mail

JOIN THE DISCUSSION

Read and share your comments on this article
COMMENT ON THIS ARTICLE

Want to leave a comment?

Only registered members of ScaleAutoMag.com are allowed to leave comments. Registration is FREE and only takes a couple minutes.

Login or Register now.
0
FREE MONTHLY NEWSLETTER
SUBSCRIBER-ONLY CONTENT

CLAIM YOUR FREE GUIDE

50-plus great reader tips!