Originally Posted by paul ferraris
Thanks for the reply. The SIB is definitely Hypalon.
Would I not use Hypalon on the cone ends seeing that the boat is Hypalon (but the cone ends are not!). Also could anyone advise if the keel of a GR 2 is PVC or Hypalon. I live in South Africa where one cannot get Zodiac spares. Could I fit a PVC keel?
Yes, if its hypalon, then use hypalon material and 2-part glue.
Here's Zodiac GR MK3 inflatable keels on EBay, not cheap at £150. Zodiac Grand raid | eBay
Contact zodiacmilpro who will be able to confirm exact part number, cost + shipping to SA.
Now I need details of how to replace the cone ends in detail.
See attach new Zodiac GR cone end. The sponson tube material fits over the rubber/plastic cone end during construction. Then the hypalon seam is placed around the circumference to overlap the cone end. It's got to be done in stages. Some more pictures here regards repair.
You need to remove existing cone end, thoroughly remove old glue, sanding off, taking care not to damage what's left of the existing hypalon. You'll need to open the sponson end seam a little to get the new rubber end cone to fit inside. Clean the material with degreaser such as Toulene and allow to dry. Follow glue instructions and mask off area for gluing. Key thing is ambiant temperature and preparation on this type of repair. Once you've glued the cone in position, ensure there is adequate pressure on the repair. One option is to use a small ratchet strap. Ensure there's no excess glue before applying the strap. Leave for at least 24-48 hours to cure.
Use a template and cut the hypalon strip which will act as a seam over the cone end. Exactly the same process. Also tidy up the sponson seam with an additional reinforcing strip of hypalon.
I'd pressure test the boat for 24 hours after you've completed the repair.
More detailed instructions here: http://www.rib.net/forum/f8/glueing-hypalon-4700.html