I would love to see the day that a company manufactures a product that, when exposed to sun, explodes in your face.
I would buy one immediately and invite my lawyer over to lube cubes in the sun.
Unless you live on the sun (which doesn't seem too far fetched) it won't be a problem. Just avoid using it while, say, using a torch to give your coffee table a modern, weathered look, or while working in the coal pit of train engine.