If you want to re-seal the small hole the needle makes,
clean the area around the needle hole after greasing with
91% isopropyl alcohol or MEK,
then use an small dab of a $3 Loctite

"Vinyl, Fabric & Plastic Flexible Adhesive"

http://www.amazon.com/Henkel-1050904-Loc...2614&sr=8-1

"Seam Grip" sold by outdoor stores is also an excellent flexible sealer, but more expensive

http://www.amazon.com/McNett-Sealer-Outd...;sr=8-1-catcorr