SafeCoat Caulking Compound is a non-toxic, water-based, elastic, emulsion-type, white, latex-free caulking compound for interior or exterior applications. It's designed to replace solvent-based caulk for general maintenance work in kitchens and bathrooms as well as outdoors around windows, doors and siding. It contains no biocides, fungicides or other anti-microbials. SafeCoat Caulking Compound won't shrink, crack or sag once applied. It installs as white, but may slightly discolor (2-3%) over time unless painted.