Works adequately as a regular hot glue gun but low temp is too hot so I bought it for styrene and foam glue. The bubbles in the photo are caused by the gas that the styrofoam releases as it melts. The craters are what's left after I peel off the hardened globs of glue and show the styrofoam melting. If you want to glue styrene or foam with hot glue, buy a better glue gun.
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