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Post by roy on Dec 11, 2010 13:32:11 GMT -5
:nono: i have some petrified wood that i want to put in my show case but it has small cracks in the face . what can i use to fill those in to get a better finish ?
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Sabre52
Cave Dweller
Me and my gal, Rosie
Member since August 2005
Posts: 20,466
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Post by Sabre52 on Dec 11, 2010 14:14:14 GMT -5
Hot stuff makes several formulations of various thickness that work well at filling cracks. Super glue will also do a good job but may not be thick enough for what you need......Mel
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Post by johnjsgems on Dec 11, 2010 15:47:21 GMT -5
Hot Stuff, Starbond, any of the CLEAR CA glues will work. I use the really thin on any wood with fractures I can see when I grind with the wet polisher and medium thick to fill any larger fractures. In Hot Stuff it would be the Red label (thin) and yellow (medium). Starbond just calls their glue "Very thin" and "Medium Thick". They work equally well on fractures but I've heard Starbond works better for stabilizing chalky turquoise. Make sure the rock is really clean (use acetone) and it may work better if you heat the rock (low heat). Let it cure completely before grinding/sanding, etc.
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Post by roy on Dec 11, 2010 17:46:47 GMT -5
thanks guys. i also was wondering what sodium silicate or water glass was used for was it to fill in cracks as well ?
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Post by johnjsgems on Dec 11, 2010 20:13:00 GMT -5
It was the old standard for stabilizing badly fractured pet. wood, dino bone, etc. I've never used it but a friend in CO soaks his specimen stuff for several days before cutting. If you only have a fracture or two or a few pits I would stick to the CA glue.
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