Superglue is great for fixing all kinds of stuff, but even the most fast-acting powerful superglues are unable to fuse some kinds of surfaces together. Now, scientists have made a break created a new kind of glue that can bond hard and soft substances to hydrogels, to be used in everything from medical devices to soft robots.

The superglue’s main ingredient is cyanoacrylate, with an organic compound that diffuses into the parts being fused, results in a tough bond without brittle residue left behind. The hydrogel bond can hold up to 1 kilogram and stretch up to 2000%, the researchers report this week in Science Advances.