What is acrovyn?

Answer 1

According to the MSDS (Material Safety Data Sheet) Acrovyn is:
37-39% Water
61-63% Acrylic Polymer
0-2% Propylene Glycol

It can be a mild eye, skin or respiratory irritant during installation but otherwise appears inert and nontoxic.

Digging Deeper:
Acrylic Polymer MSDS:
30-60% Water
15-30% Ammonia Salt of Modified Styrene Acrylic Polymers
5% Diethylene Glycol Monoehtyl Ether
1-5% Dipropylene Glycol Monomethyl Ether
1-5% Tributoxythyl Phosphate
1-5% Zinc Ammonium Carbonat