The test varnish was a commercially available product, Fluor Protector (Ivoclar Vivadent, Schaan, Liechtenstein), containing 0.1% fluoride as difluorosilane in a polyurethane varnish base. The placebo ...

There are many good products for interior woodwork, but we like the price of Minwax One-Coat Polyurethane. It comes in quart ...