URL: Hold-it clay usage information (from the manufacturer)

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https://www.reneefordmetals.com/hold-it-instructions.html

Cellulose 9004-34-6 1-11%, Mica 12001-26-2 20-30%, Sodium Chloride 7647-14-5 10-20%, Water 40-50%, Sodium Alumino Sulphosilicate 57455-37-5 1-2%, Alginate 9005-38-3 1-11%.

Related Information

What is Hold-it clay (for holding jewelry components in place for soldering)?

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The SDS lists an approximate breakdown(with CAS numbers):
We can deduce a few things:
The 57455-37-5 appears to be pigment.
This is not really a clay, it is just mica and cellulose with plasticity.
It needs not explode on heating.
Mica is permeable to water passage and obviously impervious to flame (but cellulose is not).
CAS# 9005-38-3 is a gelling agent, that must be used to impart plasticity and enable workable material with high water content.
It is not obvious why salt water is used, perhaps as a flame retardent (to hinder burning).

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