Apologies if this is old news to some of you, but it's new news to me and I thought it worth sharing nonetheless

http://sugru.com/

“I don’t want to buy new stuff all the time. I want to hack the stuff I already have so it works better for me.”

Sugru is the exciting new self-setting rubber that can be formed by hand. It moulds like play-dough, bonds to almost anything and turns into a strong, flexible silicone rubber overnight.