We bought some to seal our butcherblock countertops. I haven't put it on yet. This is probably a stupid question, but once it's all dry and sealed, is it safe to put food on the counter? I'm just a little weirded out by the smell and all the warnings on the can.
Waterlox Original Tung oil finishes are non-toxic and food-safe when dry. Special care and attention should be used when applying the finish with regard to spread rate and adequate ventilation.
There are two basic steps to the drying and curing of a Waterlox Original Tung oil finish:
The first step is the evaporation of the solvent/"carrier" system. The evaporation of solvent usually occurs in the first 2 - 4 hours with proper cross-ventilation techniques. The second step is the curing of the solids system, which is comprised of the oil and resin. The solids system completes 95% - 98% of it’s complete cure cycle in 7 – 14 days with proper ventilation; full cure, film hardness and chemical resistance properties are achieved in 30 -90 days with continued adequate ventilation.
The only “toxic” portion of the formulation is the mineral spirits, a petroleum distillate, which, as mentioned above, evaporates in order for the finish to dry in the first 2 – 4 hours. A minimum of 7 days should be waited before using the surface. While 95 – 98% of the chemical resistance properties are reached within the first 7 – 14 days, full cure, film hardness and chemical resistance properties are achieved in 30 - 90 days.