Polyurethane sheet

2_zoa · 10/12/2017, 03:04 PM

Hey all, I have some super soft polyurethane sheeting that I’d like to use in my sump under my return pump and skimmer.

My questions are, is it ok to use this in my system? What would it leach into the water? Will it ruin the acrylic that my sump and skimmer are made of?

I don’t know exactly what type it is as I get it from work. It’s very soft and is sticky to surfaces. Once you put it down it doesn’t move though it’s very easy to lift it by hand.

I believe it is this. We get it from mc master carr. It’s most likely the 3000 series.
https://www.mcmaster.com/#standard-p...heets/=19s8t0a

2_zoa · 10/12/2017, 03:09 PM

I couldn’t edit my post.
I believe, It’s the second option down on the left. The super- cushioning.

bertoni · 10/12/2017, 04:36 PM

I wouldn't trust it, but it's hard to be sure. People have killed tanks by putting a computer mouse pad into the system trying to do what you're doing. A mouse pad is a particularly dangerous idea, but I wouldn't trust any polyurethane. The Wikipedia page has some information in it that illustrates some of the issues.

Vinny Kreyling · 10/12/2017, 05:03 PM

Better off with a silicone pad for hot pots @ Bed Bath & Beyond.

Smokey Stover · 10/12/2017, 05:05 PM

Quote:

Originally Posted by bertoni

I wouldn't trust it, but it's hard to be sure. People have killed tanks by putting a computer mouse pad into the system trying to do what you're doing. A mouse pad is a particularly dangerous idea, but I wouldn't trust any polyurethane. The Wikipedia page has some information in it that illustrates some of the issues.

Oh no, Does that go for the closed cell foam leveling mats? I have some scraps under my skimmer and return pumps. I think I'll remove them until sure.

bertoni · 10/12/2017, 05:57 PM

I don't know enough about the final contents of any polyurethane product to be sure what might happen. They might be safe enough, but I'd wait for some comments from someone with a strong chemistry background before trusting anything, personally.

karimwassef · 10/12/2017, 06:20 PM

I used spray foam in my sump without issue

2_zoa · 10/12/2017, 06:26 PM

Thank you all for the replies.

What’s the opinions on these? They are silicone and just the right diameter for my skimmer.
https://www.amazon.com/gp/product/B0...EDZV2SDT&psc=1

Smokey Stover · 10/12/2017, 06:33 PM

Quote:

Originally Posted by bertoni

I don't know enough about the final contents of any polyurethane product to be sure what might happen. They might be safe enough, but I'd wait for some comments from someone with a strong chemistry background before trusting anything, personally.

Same here, Thanks for the heads up. I'd rather err on the side of caution. I wasn't sure about that foam, It floats, but thought thicker would be better at sound/vibration dampening.
It's only been in the sump a couple days, After the Irma re-start. So back to the silicone hot pot pads which I'd been using.

Edit: Those in your link look better than mine. Thicker and black. Mine are Red,Green,Blue and orange.

ericarenee · 10/12/2017, 07:37 PM

There are some poly sheets that is Food Safe.. If you know the exact brand of what you have see if you can find msds sheets on them. It will say food or food prep safe if they are OK For the tank. many resins are urethane base products.

NOPE This is not a answer just thoughts

bertoni · 10/12/2017, 07:51 PM

I agree that food-safe products are likely a good bet.

orcafood · 10/13/2017, 11:25 AM

from wiki:

"Some noteworthy recent efforts have been dedicated to minimizing the use of isocyanates to synthesize polyurethanes, because the isocyanates raise severe toxicity issues. Non-isocyanate based polyurethanes (NIPUs) have recently been developed as a new class of polyurethane polymers to mitigate health and environmental concerns."

10/12/2017, 03:04 PM	#1
2_zoa Registered Member Join Date: Sep 2008 Posts: 1,840	Polyurethane sheet Hey all, I have some super soft polyurethane sheeting that I’d like to use in my sump under my return pump and skimmer. My questions are, is it ok to use this in my system? What would it leach into the water? Will it ruin the acrylic that my sump and skimmer are made of? I don’t know exactly what type it is as I get it from work. It’s very soft and is sticky to surfaces. Once you put it down it doesn’t move though it’s very easy to lift it by hand. I believe it is this. We get it from mc master carr. It’s most likely the 3000 series. https://www.mcmaster.com/#standard-p...heets/=19s8t0a

10/12/2017, 04:36 PM	#3
bertoni RC Mod Join Date: Mar 2002 Location: Mountain View, CA, USA Posts: 88,616	I wouldn't trust it, but it's hard to be sure. People have killed tanks by putting a computer mouse pad into the system trying to do what you're doing. A mouse pad is a particularly dangerous idea, but I wouldn't trust any polyurethane. The Wikipedia page has some information in it that illustrates some of the issues. __________________ Jonathan Bertoni

10/12/2017, 05:03 PM	#4
Vinny Kreyling Registered Member Join Date: Nov 2002 Location: Miller Place, NY Posts: 7,206	Better off with a silicone pad for hot pots @ Bed Bath & Beyond. __________________ 250 gallon mixed reef, 2 Reefbreeder's Photon V 2, Deepwater BLDC 12, DAS EX-3 Skimmer, MTC mini cal, 2-3/4" Sea Swirls, Aquacontroller & 6 Tunze pumps.

10/12/2017, 05:57 PM	#6
bertoni RC Mod Join Date: Mar 2002 Location: Mountain View, CA, USA Posts: 88,616	I don't know enough about the final contents of any polyurethane product to be sure what might happen. They might be safe enough, but I'd wait for some comments from someone with a strong chemistry background before trusting anything, personally. __________________ Jonathan Bertoni

10/12/2017, 06:20 PM	#7
karimwassef Registered Member Join Date: May 2004 Location: Dallas, TX Posts: 11,033	I used spray foam in my sump without issue __________________ Failure isn't an option It's a requirement. 660g 380inwall+280smp/surge S/L/Soft/Maxima/RBTA/Clown/Chromis/Anthias/Tang/Mandarin/Jawfish/Goby/Wrasse/D'back. DIY 12' Skimmer ActuatedSurge ConcreteScape

10/12/2017, 03:09 PM	#2
2_zoa Registered Member Join Date: Sep 2008 Posts: 1,840	I couldn’t edit my post. I believe, It’s the second option down on the left. The super- cushioning.

10/12/2017, 06:26 PM	#8
2_zoa Registered Member Join Date: Sep 2008 Posts: 1,840	Thank you all for the replies. What’s the opinions on these? They are silicone and just the right diameter for my skimmer. https://www.amazon.com/gp/product/B0...EDZV2SDT&psc=1

10/12/2017, 07:37 PM	#10
ericarenee Registered Member Join Date: Sep 2013 Location: Louisville Kentucky Posts: 3,110	There are some poly sheets that is Food Safe.. If you know the exact brand of what you have see if you can find msds sheets on them. It will say food or food prep safe if they are OK For the tank. many resins are urethane base products. NOPE This is not a answer just thoughts __________________ 240+G Mixed BB Reef tank.. 350 G Marine Pond. And the expensive stuff that runs it. Chic's are for Chic's You silly men Go Fishing or something... Current Tank Info: 240= gal Reef /550 Gallon Saltwater pond 72 G Bay front Tropical aquarium

10/12/2017, 07:51 PM	#11
bertoni RC Mod Join Date: Mar 2002 Location: Mountain View, CA, USA Posts: 88,616	I agree that food-safe products are likely a good bet. __________________ Jonathan Bertoni

10/13/2017, 11:25 AM	#12
orcafood Registered Member Join Date: Nov 2007 Location: Raleigh Posts: 864	from wiki: "Some noteworthy recent efforts have been dedicated to minimizing the use of isocyanates to synthesize polyurethanes, because the isocyanates raise severe toxicity issues. Non-isocyanate based polyurethanes (NIPUs) have recently been developed as a new class of polyurethane polymers to mitigate health and environmental concerns." __________________ Acros, Zoas, Lps and Acros Kevin Current Tank Info: 200 gallon sps