Why did my silicone turn bright yellow?

ralphie16 · 04/20/2007, 07:50 AM

The silicone in my sump that I used (GE without any mold inhibitors) to glue the baffles has slowly turned a super bright fluorescent yellow.

I let it cure for a couple of days before I put any water in it.

This happen to anyone else? Do you know why this happens?

Toddrtrex · 04/20/2007, 09:03 AM

I noticed it on the sump I just built. I haven't notice anything odd with the tank. What is really odd to me is that it was the same stuff I used 2 years ago -- GE II Windows and Door -- and when I say the same stuff I mean the exact same stuff -- same tube. I didn't notice it 2 years ago, so I don't know why it is showing up now.

Not a whole lot of help, but I am not worried about mine, and like I said I have noticed zero ill effects with my tank.

RobNJ · 04/20/2007, 10:14 AM

same here , mine are yellow, i used ge silicon 1 w/ no mold additives

Travis L. Stevens · 04/20/2007, 10:29 AM

That's strange. I use GE Silicon I: Window & Door and have never had this problem.

reefinmike · 04/20/2007, 11:04 AM

i once used white ge1 silicon on a cheapo sump because i got the white for free. in some areas it turned pink?

Icefire · 04/20/2007, 11:07 AM

Toddrtrex Ge II have mold inhibitor.

Color change could be bacteria

D-Rod · 04/20/2007, 11:09 AM

The inside of my PVC & spaflex turned yellow??
My diy siliconed bafflels are clearish/white

Toddrtrex · 04/20/2007, 11:54 AM

Quote:

Originally posted by Icefire
Toddrtrex Ge II have mold inhibitor.

Color change could be bacteria

Not the stuff I used, it was over 2 years old before they made the switch. But, thanks.

syrinx · 04/20/2007, 12:15 PM

I remember in the old days when the fish meds would permanetly stain all the silicone. The pink on white is a slime mold though.

04/20/2007, 07:50 AM	#1
ralphie16 Moved On Join Date: May 2006 Posts: 1,550	Why did my silicone turn bright yellow? The silicone in my sump that I used (GE without any mold inhibitors) to glue the baffles has slowly turned a super bright fluorescent yellow. I let it cure for a couple of days before I put any water in it. This happen to anyone else? Do you know why this happens?

04/20/2007, 09:03 AM	#2
Toddrtrex Registered Member Join Date: Feb 2004 Location: Carol Stream, IL Posts: 23,162	I noticed it on the sump I just built. I haven't notice anything odd with the tank. What is really odd to me is that it was the same stuff I used 2 years ago -- GE II Windows and Door -- and when I say the same stuff I mean the exact same stuff -- same tube. I didn't notice it 2 years ago, so I don't know why it is showing up now. Not a whole lot of help, but I am not worried about mine, and like I said I have noticed zero ill effects with my tank. __________________ Click my name and then "visit toddrtrex's homepage" for tank pictures Current Tank Info: 210g reef and 65g reef

04/20/2007, 10:29 AM	#4
Travis L. Stevens Registered Member Join Date: Nov 2004 Location: Perry, OK Posts: 13,946	That's strange. I use GE Silicon I: Window & Door and have never had this problem. __________________ Travis Stevens Current Tank Info: Restarting 28g Bowfront

04/20/2007, 11:04 AM	#5
reefinmike Registered Member Join Date: May 2006 Location: ohio Posts: 846	i once used white ge1 silicon on a cheapo sump because i got the white for free. in some areas it turned pink? __________________ 90g reef lit by 2 kessil 360's and 4 T5's. 55g sump/fuge, eshopps s-200 skimmer and slowly working on getting every apex gadget

04/20/2007, 11:07 AM	#6
Icefire Seasoned reefer Join Date: Jan 2007 Location: In Quebec, Canada Posts: 3,653	Toddrtrex Ge II have mold inhibitor. Color change could be bacteria __________________ Temp 80F, PH 8.5-8.0, Alk 6.8-7.2, Ca 430, Mg 1700, NO3 0-0.25, PO4 0.04, 34.4 PPT Lights @ 100% all others, 35% White Current Tank Info: 60g Cube, 120lbs live rocks, Hydra52 2x120W, 2 MP40+ 1 MP10 @ 70%, Phosban 550 GFO+Carbon, 200W Heater, SWC Skimmer, Kalk ATO, 150 gpd RODI

04/20/2007, 10:14 AM	#3
RobNJ Premium Member Join Date: Apr 2006 Location: Hasbrouck Heights, NJ Posts: 945	same here , mine are yellow, i used ge silicon 1 w/ no mold additives

04/20/2007, 11:09 AM	#7
D-Rod Registered Member Join Date: Apr 2006 Location: Paso Robles, Ca Posts: 1,020	The inside of my PVC & spaflex turned yellow?? My diy siliconed bafflels are clearish/white __________________ The Vino Man - I Trade With Wine...Just Ask! Current Tank Info: Small Tank, Lights, Fish; Tangs a whole bunch, 4 False Perculas, 6 rose anemones Mixed Reef.

04/20/2007, 12:15 PM	#9
syrinx Registered Member Join Date: Jul 2006 Location: champaign Posts: 3,160	I remember in the old days when the fish meds would permanetly stain all the silicone. The pink on white is a slime mold though. __________________ My views are based on 49years as an aquarist, 25 years as a pro reef consultant, 10 years of owning a LFS, and the results of thousands of customers tanks. But I am always learning.