Sorry, I just couldn't resist sending this simple formula from Robert Merrill.
As you know I have been working on F/C formulas for a day or two. I do
not recommend the use of Borax. The following formula has been in use by
me for over five years and has some excellant qualities. It is the most
durable, and cost effective formula that meets the need for low to
non-existent shrinkage with super adhesion characteristics.
By dry weight: 60# fibre; 10# prtld'; 10# lime; 10# clay; 10# sand. Mix in that
order by adding the binders to the emulsified fibre. It will prduce a
light-weight, highly insulative, fire resistent, easily sprayed
material.
Best Wishes Bob
Sincerely, Judith
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