Can you paint or stain flex PVC?

Steveb

Premium Member
Like the title says I'm looking to find out if anyone has been successful at painting or staining white sched. 40 flexPVC. I saw on another site that this was a no no, just trying to confirm.
 
I posted a link in your trying to find blk pvc thread. I do not know if this is aquarium safe though as I know no one who has tried it.
 
Like the title says I'm looking to find out if anyone has been successful at painting or staining white sched. 40 flexPVC. I saw on another site that this was a no no, just trying to confirm.

In this case, black flex pvc should not be that hard to find. I think it is simply a search term problem. The term is 'spa flex.' Flex PVC is a company name, and a few websites are named thusly as well.

https://www.google.com/search?q=black+spa+flex+hose&ie=utf-8&oe=utf-8&aq=t&rls=org.
 
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Dry paint is not flexible so when you "flex" the spa flex tubing it will crack and most likely flake off the tubing possibly ending up in sump.
 
Dry paint is not flexible so when you "flex" the spa flex tubing it will crack and most likely flake off the tubing possibly ending up in sump.

If I go that route I will paint it in place or close to it with minimal flexing...
 
I happened to find an old piece of 1" spa flex in my plumbing odds & ends box shortly after I started this thread and painted it with krylon fusion, about 2 hours ago now. Its still very sticky. I will wait until in the morning but I think the warning about painting it appears to be correct.

What about the PVC dye from Narad Corp that you mix with MEK. Anyone have any experience?
 
I happened to find an old piece of 1" spa flex in my plumbing odds & ends box shortly after I started this thread and painted it with krylon fusion, about 2 hours ago now. Its still very sticky. I will wait until in the morning but I think the warning about painting it appears to be correct.

What about the PVC dye from Narad Corp that you mix with MEK. Anyone have any experience?

What the heck then, give it a shot:). I have no help for you about using the dye.
 
The results are in - NOPE you cannot paint spa flex. The piece I painted is still sticky this AM. Bummer...


I guess I will go pick up some RED RIT dye and some MEK today on my way home from work.
 
The results are in - NOPE you cannot paint spa flex. The piece I painted is still sticky this AM. Bummer...


I guess I will go pick up some RED RIT dye and some MEK today on my way home from work.

I'm sure it will dry with more time but I still think it will crack.
 
I don't think so. Normally its hard in four hours (not sticky). Its the same now as it was last night. Weird thing is the color seems to be fixed and flexible.
 
I don't think so. Normally its hard in four hours (not sticky). Its the same now as it was last night. Weird thing is the color seems to be fixed and flexible.

I told you why this would happen in your other thread: solvent. There is a chemical imcompatibility. Both rigid pvc pipe and spa flex have what is called plasticizers in the chemical composition. The best way to think of it, is as a solvent, that takes 10 years to evaporate rather than a few seconds.

Spa flex has a great deal more plasticizer that rigid pvc pipe. You can use say krylon fusion on rigid pvc, but not on spa flex. The solvents in the paint melt the surface of spa flex more, and it just becomes a sticky mess.

Since very few paints will actually stick to plastic from the word go, it is harder to get them to stick to heavily plasiticized plastic.
 
I told you why this would happen in your other thread: solvent. There is a chemical imcompatibility. Both rigid pvc pipe and spa flex have what is called plasticizers in the chemical composition. The best way to think of it, is as a solvent, that takes 10 years to evaporate rather than a few seconds.

Spa flex has a great deal more plasticizer that rigid pvc pipe. You can use say krylon fusion on rigid pvc, but not on spa flex. The solvents in the paint melt the surface of spa flex more, and it just becomes a sticky mess.

Since very few paints will actually stick to plastic from the word go, it is harder to get them to stick to heavily plasiticized plastic.

Which is in line with what I have read, I suspected it was the additional plasticizer but wasn't sure, and have now proven via experiment (painting spa flex with solvent based paint == no no)...

So I am assuming MEK and a stain will result in the same failure at this point.

So is there a way to color white spa flex Red or Blue?
 
Which is in line with what I have read, I suspected it was the additional plasticizer but wasn't sure, and have now proven via experiment (painting spa flex with solvent based paint == no no)...

So I am assuming MEK and a stain will result in the same failure at this point.

So is there a way to color white spa flex Red or Blue?

I think that is a safe assumption. Of course, folks that have never done this, will encourage you to do so... ;)

Folks wanting to 'color' spa flex, although most consider it a waste of time, wrap the spa flex tightly with tape, and paint the tape... hint hint....
 
LOL funny you should mention that..."paint the tape"

I was looking for 1.5" sized Red heat shrink tubing last night.. :lol: I'm thinking black spa flex may be good enough at this point.
 
If you can keep the coloring above any water lines, maybe a vinyl wrap? I'm not sure how well it would stick (it's pretty sticky stuff) but if it doesn't just double wrap it. Even if you go with a quality cast vinyl, it should be relatively cheap ($30-$50) depending on how much spa flex you're trying to color.
 
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