Make sure the glue gun has a low-heat setting because high heat will melt the foam. Remember that polystyrene is made up of many smaller molecules called monostyrene. High heat or prolonged exposure to heat can make the Styrofoam to melt or break. On the other hand, conductors such as metal are poor insulators because energy flows through them. Styrofoam is made of polystyrene beads. Styrofoam is made mostly of air, meaning it is a poor conductor of heat, but an excellent convector. You can also use liquid Elmer’s glue and Liquid Nails as alternatives. 'Styrofoam' is actually a polymer of styrene (vinyl benzene --- C6H5-CH=CH2). Traditional Styrofoam. It traps the air in small pockets, blocking the flow of heat energy. The DOW is trying to eliminate the use of styrene as it is because it smells so bad and is very toxic hence the company is trying to resort to co-polymerization (adding other monomers along with styrene in the polymerization process). Therefore, reusing it is a great way to be eco-friendly and sustainable. If this happens in the case of the first Styrofoam that we just talked about, you are likely to end up with the broken or melting Styrofoam. While the food-grade Styrofoam has been designed to work with microwaves, it is not much able to withstand heat. The acetone (formula (CH3)2CO) breaks the bonds that hold the polystyrene together. This is the sort of question that I'd usually answer with a link to LMGTFY, but in this case you get a pass, because you need to know what styrofoam is before you can get a good answer out of google. This reduces both conduction and convection and makes Styrofoam a good insulator. 2) I've seen numerous reports online of a heat lamp or a heat pad causing the nice styrofoam backgrounds to melt, but no pictures or substance. As Styrofoam is made from plastic, the hot glue gun can actually cause it to melt, potentially damaging your designs. Polystyrene foam is much more heat-sensitive than polyurethane foam .. it softens already at 90°C (193°F), while the temperature of hot-melt glue is around 180°C or more. In the following, you’ll learn which glue to use on Styrofoam, the difference between Styrofoam and polystyrene, and what exactly EPS and XPS foams are. So, the correct question is: Why does acetone dissolve styrofoam? Styrofoam (Polystyrene) is very bad for the environment, and yet it can’t be recycled in most places (including a large part of the US). In other words, the cutting edge will reach a higher temperature in the air than when it is cutting styrofoam, as the foam will absorb the heat. Also, when melting or otherwise exposed to heat, styrofoam can release carbon monoxide which is potentially toxic. Melting styrofoam can become liquidy and get onto the skin, causing burns or irritation. The biggest concern when using styrofoam is to always be aware if it is melting. But, how the heck can you reuse styrofoam into useful things that you … Hot glue guns should only be used to attach materials which are not affected by heat. During normal use Styrofoam remains stable, but once it has been exposed to high temperatures the material begins to melt and break down, those toxic chemicals contained within can leech into your food. Styrofoam dissolves in acetone, it doesn't actually melt - melting requires heat. The melting point (for lack of a better phrase) of polystyrene appears to be quite high, higher than most heat lamps would get, is this a legitimate concern?