What kind of solvent use to dissolve polystyrene?
Try dichloromethane CH2Cl2, highly volatile, avoid inhalation, avoid contact with skin. As a prototyper and modelmaker I use it often, in UK it is sold as "Plastic Weld", a constituent in UPVC pipework adhesive gels and Revell's Model Adhesive.
Thank you David Jazani, Is the polarity of dichloromethane effects on dissolving polystyrene?
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