Flex seal liquid reef safe

Randy Holmes-Farley · Nov 9, 2023

MickeyCT said:
Just as an FYI - I've read all the FAQ's for all the Flex Seal products and they all say in one or another that the product is not to be used in potable water containers or not to be used with food products. I was investigating it as a way to seal a hole in the bottom of my brute trash can used as a saltwater mixing container.

That does not make a product not reef safe.

paintman · Nov 9, 2023

Just as a heads up..............Flex Seal is absolute junk!!!!!!! My wife and I used it on some spillway bowls that we have in our koi pond. Within a week of being submerged the Flex Seal started to blister and come loose. And the crap didn't even come with a free set of steak knives.

Mickey · Nov 9, 2023

@vetteguy53081 - thanks for confirming I shouldn't use it to repair the hole in my container.

@Randy Holmes-Farley - when thinking about using something for my reef I've always checked to see if it is safe for potable water and/or food. If that is not valid, what should I look for?

paintman · Nov 9, 2023

I certainly wouldn't build a boat out of a screen door and use FlexSeal.

Randy Holmes-Farley · Nov 9, 2023

MickeyCT said:
@vetteguy53081 - thanks for confirming I shouldn't use it to repair the hole in my container.

@Randy Holmes-Farley - when thinking about using something for my reef I've always checked to see if it is safe for potable water and/or food. If that is not valid, what should I look for?

That's a great goal. But sometimes we have to resort to non graded materials, and sometimes we'd reject things with those grades (such as potable water itself that might contain 1 ppm copper.

YOYOYOReefer · Nov 9, 2023

MickeyCT said:
Just as an FYI - I've read all the FAQ's for all the Flex Seal products and they all say in one or another that the product is not to be used in potable water containers or not to be used with food products. I was investigating it as a way to seal a hole in the bottom of my brute trash can used as a saltwater mixing container.

That’s cuz it’s a legal disclaimer. What food use are you looking for. Plenty of food grade things are hazardous to a reef tank. Like copper, sugar, flour, etc. what’s food grade got to do with anything?