Wouldn't Spray Foam leach phosphates?

[maximusmarine]

I've been thinking of using spray or pond foam for a future build. However I'm concerned with the continued submersion in SW, if eventually the material would break down and start leaching Phosphates. I've seen some great displays using this method but it would really suck to crash a system because of an affordable option. Is this possible?

 

[dzfish17]

Im going to build a rock wall too and was wondering the same thing. I would think that it would break down eventually.

I only want to do this once so Im not going to use foam. Im going to build the wall out of marco rock and fill in the gaps with diy rock (portland cement and oyster shell).

Dave

 

[noahm]

MSDS

I am not sure where the phosphates would be coming from if it did break down. Maybe I am missing something. I think a lot of people have used it successfully though.

 

[dzfish17]

I guess what Im wondering is will it last 5 yrs or 20 yrs. Im not worried about leaching, just the foam falling apart yrs from now. Has anyone used foam say 5 yrs ago and still have it holding together. Most of the builds I see are very current.

Dave

 

[TAB]

If you seal it up well, it could last 20 years no issue. if not all bets are off. more so if you are exposing it to UV light.

 

[maximusmarine]

Im going to build a rock wall too and was wondering the same thing. I would think that it would break down eventually.

I only want to do this once so Im not going to use foam. Im going to build the wall out of marco rock and fill in the gaps with diy rock (portland cement and oyster shell).

Dave

That sounds like a good alternative. I'm thinking if th foam wasn't properly sealed it would absorb and leach like phosban media. I agree that all the builds I've seen are also current.

 

[maximusmarine]

If you seal it up well, it could last 20 years no issue. if not all bets are off. more so if you are exposing it to UV light.

What's the best way to seal it? :hmm1:

 

[maximusmarine]

MSDS

I am not sure where the phosphates would be coming from if it did break down. Maybe I am missing something. I think a lot of people have used it successfully though.

I read the MSDS and thank you for that. However from what I've read I failed to see anything about prolonged effect by being submerged in Saltwater which seems do eat almost everything over time.

Product Name: GREAT STUFF(TM) Pond & Stone Insulating Foam
Sealant 12oz HC
Issue Date: 12/05/2007
Page 6 of 12
Flash Point - Closed Cup -104 °C (-155 °F) Estimated
Flammable Limits In Air Lower: No test data available
Upper: No test data available
Autoignition Temperature No test data available
Vapor Pressure 1,151 kPa @ 55 °C
Boiling Point (760 mmHg) Not applicable.
Vapor Density (air = 1) No test data available
Specific Gravity (H2O = 1) 1.06 Calculated
Freezing Point No test data available
Melting Point No test data available
Solubility in Water (by
weight)
reacts with water, Insoluble
pH Not applicable
Kinematic Viscosity Not applicable