R&F Encaustic Paints, 40ml, Sienna Yellow Extra Pale Handmade in the usa Composed of 100-percent pure pharmaceutical grade beeswax, singapore-grade damar resin and chemically pure pigments Contains iron oxide and titanium zinc-white Conforms to ASTM D-4236 Avoid overheating this product. wax will release toxic fumes when heated above decomposition temperature. do not heat above 200-degree fahrenheit. use with ventilation