Since they are not limited to a moisture cure system, two-part CAs have wide gap filling and curing capabilities, unlike traditional one-part CA adhesives. Two-part CAs have a more rapid speed of cure then one-part CAs and provide enhanced bonding performance on acidic surfaces and in low-humidity curing environments. Two-part CAs also provide high bond strengths on most plastics. Like one-part CAs, in destructive assembly testing often the plastic material fails before the adhesive.