I've still got 1/2 a can of HH-66 if anyone wants it. It's very hard to use on an overhead surface, (it is thin & runny) and will dissolves some vinyls.
It is highly toxic in enclosed spaces, is listed as being Extremely Flammable, contains Toluene, M.E.K. and acetone.
Here is the MSDS Sheet: https://www.rochfordsupply.com/tech_...%20%20MSDS.pdf
I used it outside to make up some edging and still got dizzy and sick from the fumes.
Bottom line, Yes it works, but it is both dangerous and difficult to use.