I have an 11'x10' outdoor shed. I have a cement slab and was wondering if I need any adhesives or double-sided tape to keep the flooring from slipping or moving?

For most installations, you can install our Diamond Nitro Rolls without glue or tape, and we recommend that. The material is heavy enough to stay down on its own. If there were movement for any reason, typically double-sided tape is all that is needed. If that still doesn't work, you can then upgrade to a pressure sensitive adhesive.