I don't know about it having cyanide, but Dermabond is, from the package, " 2octyl cyanoacrylate." "Cyano" just means it has a Carbon-nitrogen bond, not that it's cyanide... besides, that's the sterile medical stuff.

As for using it, ideally (according to the product rep) it's applied like sutures: interrupted, with a "strip" of glue about every 1/4 inch. This allows drainage of the wound to help prevent abcess formation.

The wet-to-dry method mentioned by Art is actually shown to be detrimental, even though it's widely used. When pulling out the dried gauze, it pulls out whatever is stuck to it, including new granulation tissue. Usually the gauze is soaked only in saline.

Best 'generic' advice is to keep it clean and covered. Keeping it moist and frequent dressing changes (after the first 24 hours) helps keep scarring down. Triple antibiotic ointment is OK for this, but don't slather it on, just the bare amount needed to cover the wound. Don't forget, skin is an organ, just like the heart, and the more exposure it gets to something, the higher the chance of forming an allergy to it. Skin regrows at a rate of 1/2 - 1mm daily, so you can eyeball how fast it should cover up.