Pyrite Coat

[Dave J]

I recently purchased this product from Zoic Palaeotech which is a hydrophobic coating to stop decay in pyrite fossils. I've yet to use it and was wondering if anyone else has used it and had any feedback on how it performs?

 

[Jaybot]

Interesting, I know some people have had success with B72, but I know nothing about B67.  Knowing Zoic, it probably does its job.

[Ptychodus04]

I've not used Paraloid B67 but I have used Paraloid B72 and Vinac B15 on pyritized fossils. They tend to work well in most cases. I have had a few specimens still succumb to pyrite decay 15-20 years after treatment. The only research I could find on B67 vs B72 was related to preserving wood artifacts. The tests found the 67 degraded faster and yellowed more then 72.

[Jaybot]

6 hours ago, Ptychodus04 said:

I've not used Paraloid B67 but I have used Paraloid B72 and Vinac B15 on pyritized fossils. They tend to work well in most cases. I have had a few specimens still succumb to pyrite decay 15-20 years after treatment. The only research I could find on B67 vs B72 was related to preserving wood artifacts. The tests found the 67 degraded faster and yellowed more then 72.

Interesting.  I wonder for what reasons zoic is using 67 in this product 

[Ptychodus04]

11 hours ago, Jaybot said:

Interesting.  I wonder for what reasons zoic is using 67 in this product 

It is slightly harder than B72. I’m assuming that is the reason.

[connorp]

Consolidants won't stop pyrite decay. If the decay starts, the consolidant will hold the fossil together for longer, but eventually the fossil will turn to dust.

[Everhardus]

I use Paroloid B27, and agree, if decay starts there’s no stopping it. Probably B67 works similar. Some specimens are stable, some not.