epoxy and polyester resin question
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epoxy and polyester resin question
I have the hull together with loctite epoxy, i would like to know if i can coat the hull in a polyester resin to seal it up. I thought that i read somewhere that you couldn't use a certian resin but i can't find it now. The loctite says that it wil not bond polyethylene or polypropylene products. Anyone done this before. Thnaks
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RE: epoxy and polyester resin question
polyester resin wont adhere to epoxy so if you used epoxy for the gluing up where the epoxy is at the seams the poly resin wont go off.epoxy will stick to poly though CONFUSED? its just one of lifes little mysteries.if you used epoxy just use epoxy to seal the hull,if you make sure its warm it will spread easier,just leave it in the sun for a bit or near a radiator if the weathers cold .
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RE: epoxy and polyester resin question
ORIGINAL: jeremy242
I have the hull together with loctite epoxy, i would like to know if i can coat the hull in a polyester resin to seal it up. I thought that i read somewhere that you couldn't use a certian resin but i can't find it now. The loctite says that it wil not bond polyethylene or polypropylene products. Anyone done this before. Thnaks
I have the hull together with loctite epoxy, i would like to know if i can coat the hull in a polyester resin to seal it up. I thought that i read somewhere that you couldn't use a certian resin but i can't find it now. The loctite says that it wil not bond polyethylene or polypropylene products. Anyone done this before. Thnaks
What is your hull made of Jeremy?
Glenn
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RE: epoxy and polyester resin question
I think Martin is right.
If you need to coat the inside of the Hull, you probably need to use epoxy two pack now as you have used it on the joints.
It goes very liquid when warmed. You can use a hairdryer to make it flow easily to where you need it too.
Glenn
If you need to coat the inside of the Hull, you probably need to use epoxy two pack now as you have used it on the joints.
It goes very liquid when warmed. You can use a hairdryer to make it flow easily to where you need it too.
Glenn
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RE: epoxy and polyester resin question
If you need to thin the 2 part epoxy out, you can use some rubbing alcohol as it will make it thin and evaporates to full cure hardness. Allows a better penetration on stuff like balsa. I have done this on plane fuselages with no problems.
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RE: epoxy and polyester resin question
Before thinning epoxy with alcohol, acetone, or any other solvent, I suggest reading the following:
http://www.westsystem.com/ewmag/14/ThinningEpoxy.html
For those wanting to jump to the conclusion, here it is:
Does thinning epoxy make sense? In some situations, thinning is appropriate. In others, it is not. We feel that in most circumstances using heat to thin epoxy is preferred to using solvents. As long as the epoxy does not overheat during cure, the full physical characteristics of the cured epoxy remain. Adding solvent is a quick, simple method of thinning epoxy, but the strength and moisture resistance of the cured epoxy are significantly reduced.
http://www.westsystem.com/ewmag/14/ThinningEpoxy.html
For those wanting to jump to the conclusion, here it is:
Does thinning epoxy make sense? In some situations, thinning is appropriate. In others, it is not. We feel that in most circumstances using heat to thin epoxy is preferred to using solvents. As long as the epoxy does not overheat during cure, the full physical characteristics of the cured epoxy remain. Adding solvent is a quick, simple method of thinning epoxy, but the strength and moisture resistance of the cured epoxy are significantly reduced.