Will epoxy stick to PVC pipe? - SailNet Community
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post #1 of 19 Old 05-19-2014 Thread Starter
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Will epoxy stick to PVC pipe?

Just a quick question ... I'm using 40mm PVC pipe instead of leather on my oars (where they pass through the oar locks). I tried fixing a ring of PVC pipe to prevent the oar from sliding through the oar lock, but the PVC pipe glue didn't last long. I was thinking of fixing it with thickened epoxy. Does anyone know if epoxy will glue PVC pipe?

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post #2 of 19 Old 05-19-2014
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Re: Will epoxy stick to PVC pipe?

No, epoxy will not stick. Gorilla glue, urethane may work. But nothing like a screw or nut and bolt to hold it in place..KISS
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post #3 of 19 Old 05-19-2014
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Re: Will epoxy stick to PVC pipe?

From the kiteboard industry, PVC is sometimes used around the perimeter of a kiteboard. Then the glass/epoxy is vacuum bagged to the PVC. The bond is made by first roughing the PVC with something like 80 grit paper. Then the flame from a propane torch is passed over the PVC just prior to vacuum bagging. I am not sure what treating the PVC with a flame does to help this. You could probably do a search online and get more information. Many kiteboards are manufactured using this process and the bond seems to hold well. I've used one extensively for about 3 years...no delamination as yet.

On the other hand, I don't trust doing this myself, as treating the PVC with a flame seems to be close to an art-form.
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Re: Will epoxy stick to PVC pipe?

I think I'll try roughing it up and using epoxy. If t doesn't work, i can always try the gorilla glue or screws... Thanks for the replies.

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post #5 of 19 Old 05-19-2014
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Re: Will epoxy stick to PVC pipe?

I tried to gorilla glue a piece of plywood to cured fiberglass. It did not stick. In fact I just peeled the last piece of gorilla glue off of the fiberglass. Was not difficult.
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Rough sand with coarse (40) sand paper, wipe clean then clean with PVC pipe joint cleaner. If using woven fiber glass mat roll the mat into a generous coating of PVC pipe joint adhesive and let cure for 20-30 mins before the adding epoxy.

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Re: Will epoxy stick to PVC pipe?

West Systems' G/Flex epoxy is made for plastics and does work. I even wrote an article about it

http://www.epoxyworks.com/31/pdf/Har...r%20Repair.pdf
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post #8 of 19 Old 05-19-2014
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Re: Will epoxy stick to PVC pipe?

i used gflex on my plastic items and found it to be inadequate, as it did not bond, despite proper prep and application procedures. .


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Re: Will epoxy stick to PVC pipe?

why not use pvc pipe glue


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post #10 of 19 Old 05-19-2014
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Re: Will epoxy stick to PVC pipe?

I had to glue up 2 layers of starboard - needed a thicker piece, used a specific epoxy,(I believe it was Lord 363) but I also had to pass a flame over the 2 pieces before I applied the epoxy. Strong as hell now.

Here's what King Starboard says about using a flame - maybe it will work for the PVC also -
"Following the operating cautions of your propane torch, ignite the flame.
Working in a safe and well-ventilated area, hold the torch so the flame is approximately one to two inches or two and a half to five centimeters away and the blue, oxidizing portion of the flame is on the StarBoard surface to be bonded. Pass the flame over the surface at a rate of approximately twelve inches or thirty centimeters per three seconds.
Total time the material should be exposed to the flame should be two to three seconds, about one half second per stroke.
This light exposure should not deform or melt the polymer in any way. You may see a “shadowing” effect as the flame passes across the surface, this is normal.
Make sure to let the polymer cool before proceeding.
Test the effectiveness of your flame treatment of the surface by wetting it with water.
If the water beads up like on a freshly waxed car, the treatment was not effective. If the water “sheets” or lays flat on the surface, like on an un-waxed car, the treatment was effective and the surface is ready for bonding. If you are unsure if the surface is ready, compare the water’s action on treated area with the untreated area.
For the best adhesion, bond the product within thirty minutes of treatment as the flame treatment is temporary and declines in effectiveness with time. If you get interrupted and cannot complete the bonding within an hour or two you should re-treat the surface again before proceeding."
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