The BBC reports that French researchers have invented a rubber made from urea (a component found in urine) and vegetable oil that rebinds when cut. They say immediate applications include self-reparing seals and kids toys.
The substance, described in the journal Nature, produces surfaces when cut that retain a strong chemical attraction to each other.
Pieces of the material join together again as if never parted without the need for glue or a special treatment.
The French researchers are already making kilogramme quantities in their Paris laboratories and say the process is almost completely green, and could be completely so with a few adjustments.
Link (Thanks, Sigsy!)