Resin Material - It's made of excellent harmless clear resin,which hardly generates any bubbles or none and can cure to a smooth and clear crystal shape.Widely Used - UV Resin can be used for small items making,like jewelry,crafts decorations,casting and coating,etc.It also can be mixed with other materials to achieve variable color.Convenient & Efficient - It can instantly cure hard faster with UV light like LED UV lamp,blacklight flashlight as well as sunlight.Flush Fit Clear Mold - Because of light transmission,unclear mold may remain tacky after the resin has mostly cured.Clear mold can improve light transmittance and accelerate curing.Kind Note - Please keep it in dark place,and avoid heat.There is an odor before curing and will completely disappear after curing.