Two days after i applied polyester resin to a engine room hatch, it is still tackey. any tricks? Must not have added enough hardner. Any Tricks? Thanks
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Thread: Polyester Resin tacky
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09-26-2006 08:59 AM #1Registered Member
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- Jul 2005
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Polyester Resin tacky
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Re: Polyester Resin tacky
Definitely sounds like not enough hardner. What is the temp where you are at? I don't know if this is a sound way of doing it or not, but I've had this happen before on smaller projects and simply mixed up more resin with sufficient hardner and put on another coat....The additional activator helped cure the resin underneath it.
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Re: Polyester Resin tacky
depends on what type of resin. laminating resin stays tacky. polyester does not get hard unless wax is added.
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09-26-2006 09:34 AM #4
Re: Polyester Resin tacky
You need to add wax ( yes wax) to the last layer of laminate resin as the agent to cause it to dry completely. Grind it lightly and get the wax addative or a finish (waxed) resin and lightly coat the area and it will be fine. Less hardner (as you suspectthe problem to be) is actually OK and will allow the resin more cure time causing a stronger end product. Just dont build up alot on that last overcoating or it will become brittle.
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Re: Polyester Resin tacky
Sometimes you can use a heat gun to active the Hardner. This has the posibility of making it briddle, but you can give it a try, just dont give it too much heat.
Pat Bustle
Palmetto, Florida
1984 38 Topaz Express "Aranmore"
Broker, United Yacht Sales
Visit My Website
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09-26-2006 10:16 AM #6
Re: Polyester Resin tacky
You can use PVA spray over it and get it to harden. Left to the oxygen in the atmosphere it will stay tacky. PVA is polyvinylalcohol. Most places that supply fibreglass stuff have it. It is not an incorrect mix that did this.....Pat
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Re: Polyester Resin tacky
Is there any material that was added or did you just coat it with resin???
Dan
End Of The Line II
1967 34C
EOTL II Rebuild Web Page
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09-26-2006 01:34 PM #8Senior Member
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Re: Polyester Resin tacky
Poly resin does that whereas epoxy does not. IMHO West System is eaisier to work with but is more expensive
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Re: Polyester Resin tacky
If the resin is old it will not harden. Did you use old or opened resin? if so that may be your problem
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09-27-2006 09:52 AM #10Senior Member
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- Apr 2005
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Re: Polyester Resin tacky
you have to use waxed resin for the final coat of resin or use something to cover the resin, like wax paper to keep the mek from evaporating from the surface and leaving the surface tacky.
Chris
1973 48' Yachtfish
"Boss Lady" my other expensive girlfriend.
Follow the refurb at www.starcarpentry.com