If I am correct, it is OK to laminate epoxy over ester resin but not resin over epoxy. Can anybody confirm if I am correct? Jean Pierre Dufour <mailto:jpjdufour@yahoo.com>jpjdufour@yahoo.com <http://www.dominocat.org>www.dominocat.org

That is correct. Polyester is a poor secondary bonding agent. When fiberglass boats are originally laid up the multiple layers of glass & resin form a molecular bond with each other. After the polyester resin has fully cured this bond no longer takes place. Polyester resin can creat a mechanical bond with aged fiberglass but it is a poor bond at best. Epoxy resin creats a tenacious secondary bond to polyester resin & should be used for fiberglass repairs. Polyester resin, including gelcoat, cannot be applied over epoxy resin. Epoxy should also be used when glassing over wood. Epoxy bonds well to wood. Polyester resin does not. Also, make sure you get an epoxy suitable for the temperature & use intended. Carl Martin Scout 30 ----- Original Message ----- From: "jean-pierre dufour (by way of Georgs Kolesnikovs)" <jpjdufour@yahoo.com> To: "Passagemaking Under Power List" <passagemaking-under-power@lists.samurai.com> Sent: Saturday, December 16, 2006 6:32 PM Subject: [PUP] lamination If I am correct, it is OK to laminate epoxy over ester resin but not resin over epoxy. Can anybody confirm if I am correct? Jean Pierre Dufour <mailto:jpjdufour@yahoo.com>jpjdufour@yahoo.com <http://www.dominocat.org>www.dominocat.org _______________________________________________ Passagemaking Under Power and PUP are trademarks of Water World Productions, formerly known as Trawler World Productions. To be removed from the PUP list send an email with the subject "unsubscribe" (no quotes) to the link below: mailto:passagemaking-under-power@lists.samurai.com Passagemaking-Under-Power Mailing List