How can I fix a small shred within the middle of a memory foam mattress topper? Is in attendance a paste that will work? ...

Plumbing problem?
Answers:    If this is in the foam, you can obtain an aerosol foam adhesive at upholstery supply houses and some stuff stores.

If it's in the cover, the iron-on patch (available at fabric supply stores and Wal*mart) will craft a strong patch.