I do not want epoxy to stick to PVC.

[AcroSteve]

What is the best thing to coat some PVC so that epoxy will not stick to it?

I want to use some PVC pipe as a mold of sorts.


I am thinking that some cooking spray might possible work.

Anybody done this before?

[stylolvr]

There are some good mold releases that are used in fiberglass work. You can usually get them at a West Marine, or a similar boating supply store.

[xJake]

Silicone "o-ring" grease, maybe? I can't think of much that would be reef safe. You are talking about normal fragging "play-doh" putty epoxy? If so then it stays somewhat porous and could absorb whatever you use to keep it from sticking. Have you tried it without anything? I have a hard enough time getting epoxy to stick to corals and rock let alone PVC. Or are you talking about epoxy paint or some other epoxy? If you explain what you're trying to do exactly then I could help you better.

[woodiecrafts]

Wax would work. Beeswax or carnuba(sp.) with both of them being all natural, they should be pretty well reefsafe as well if there would be any residue left.

[james3370]

i built a custom subwoofer enclosure into the spare tire well in my trunk.....wood frame for the top & sides of the enclosure laid in place & then masking tape the inside area to be coated from the wood to the metal & covered the entire tire well in masking tape. coated it all in layers of fiberglass sheets covered in epoxy resin. did several layers over a few days.

once it fuly cured, the whole thing cen be just peeled loose from the metal and leave a nice hard structure in the shape of the spare tire well.....i'd assume masking tape would work just as well for your situation
:D

[AcroSteve]

It will be regular epoxy, not the sticks. I have some holes that I want to pour some epoxy around the PVC, then remove it, leaving a nice round hole. But the bond has to release very easy.


I do have some bees wax and silicone grease, but had not thought of that. I guess I went towards the kitchen items thinking they would be reef safe.

I have tried masking tape in other situations and the epoxy stuck to it more than I would like.

[Rysam]

what about wrapping the pipe in saran wrap?

[Harry_Fish]

Fish oil

[EnderG60]

box tape, duct tape, saran wrap, Al foil, vasoline, cooking oil....

[sailoracu2]

+ 1 on wax

[james3370]

i also got to thinking about the stuff for mechanics called liquid glove or something....put it on your hands & then when you wash it off it takes it & the grease & crud w/ it......might be worth a try

[AcroSteve]

I don't want to buy anything, so I am going with the silicone.

[The0wn4g3]

I've used Gunk Silicon spray on o-rings to help seal my recirculating aquabee pumps before. I'm assuming it's reef safe as it's been in the tank about 5 months.

[H20ENG]

Plastic packing tape is a great mold release, but if the epoxy is all the way around the pipe, it will be tough to push the pipe out. For that I'd use wax or silicone too.

[AcroSteve]

Yea, that's the bad part. It will be all the way around. I will be waiting until after the holidays to give it a shot.

[eznet2u]

<a href=showthread.php?s=&postid=13988760#post13988760 target=_blank>Originally posted</a> by james3370
i also got to thinking about the stuff for mechanics called liquid glove or something....put it on your hands & then when you wash it off it takes it & the grease & crud w/ it......might be worth a try

Liquid Glove™ is some type of soap. Not a good thing in a reef tank. ;)

[dtech]

Pure Carnuba wax is best for mold making in most situations, Even when doing crazy stuff like carbon fiber etc.