Surface treatment: the surface of the object is cleaned, the surface is dry, no oil, no dust. The optimum operating temperature of hard plastic is between 20 and -30, and it is not suitable for use in low temperature and high humidity conditions. Hard plastic special adhesive non porous materials, in the sticky material surface evenly coated adhesive, airing after 1-2 minutes, until slightly viscous, the bonding surface aligned bonding to together and compaction for 1 to 2 hours, 48 hours after can achieve the best strength. Is viscoelastic surface roughening treatment or two glue adhesive can make better effect. Hard plastic plastic storage in a cool dry place.