Recently we have been using POOL DOCTOR, a “super adhesive for underwater application.” It is 100% non-toxic and uses eco materials. It comes in clear or white, usually in a 1 oz tube. http://www.underwatergluecalifornia.com/product/pool-doctor/
There are stronger, though more toxic, adhesives you can purchase from West Marine or a local boating/marine store.
RETURN POLICY FOR XTERRA OUTLET - Products may only be returned within 15 days of receipt. They must be returned in the condition received. They may NOT be returned for an exchange. They may only be returned for WEBSITE STORE CREDIT at any of our websites - www.xterraoutlet.com, www.xterrawetsuits.com, www.xterraboards.com, or www.xterrasurf.com