Epoxy in Water Tanks

Bob Meier of Mount Vernon, Ohio, asks:"I need to repair an 80-gal fiberglass water tank that is leaking. What food-grade material would you recommend for this purpose? I’d like to use an inert substance that will seal the tank and reinforce the weak area without contaminating my drinking water."Don Casey replies:There are plenty of food-grade
Author:
Publish date:
Social count:
0

Bob Meier of Mount Vernon, Ohio, asks:

"I need to repair an 80-gal fiberglass water tank that is leaking. What food-grade material would you recommend for this purpose? I’d like to use an inert substance that will seal the tank and reinforce the weak area without contaminating my drinking water."

Don Casey replies:

There are plenty of food-grade epoxy coatings available, but these are more for painting than repairing things. For a repair, I would use a quality epoxy resin, such as West System 105 or something similar. It seems unlikely you run much risk of making your tank less safe with an epoxy repair, the majority of which will presumably be made on the tank’s exterior. You should take the precaution of mixing the epoxy in a hardener-lean ratio to reduce the possibility of there being free hardener in the cured epoxy. If you are concerned about the new epoxy after the repair, you can always cover it afterwards with a food-grade epoxy coating.

Epoxy water tanks have been around for more than four decades, but it is notable that West does not recommend epoxy for drinking water tanks because of regulatory and safety issues. For an excellent perspective on the subject, I suggest you consult West’s online Epoxyworks article at epoxyworks.com/18/pdf/tanks.pdf. It includes advice as to the correct hardener ratio for a water-tank repair.

Related

NightWatch-01

Night Watch

Robert Reeder is a seamanship instructor for a series of online courses through Boaters University. His course, Fundamentals of Seamanship: Rules of the Road, is a great way to get a full understanding of how to interpret the USCG rules of the road and how to apply the rules in ...read more

BinosOnDeck-02

Binoculars for Lookouts

Robert Reeder is a seamanship instructor for a series of online courses through Boaters University. His course, Fundamentals of Seamanship: Rules of the Road, is a great way to get a full understanding of how to interpret the USCG rules of the road and how to apply the rules in ...read more

01 Landing Page

Volvo Race: Bound for Newport

It’s a very different kind of sailing from what the fleet experienced in the course of a windy Leg 7, as the Volvo Ocean Race wends its way north from Brazil to Newport, Rhode Island.As expected, the St. Helena High, which dominates the weather in the South Atlantic, has made for ...read more

North Sails 3Di - What you need to know

North Sails 3Di - What you need to know

3Di Outlasts The AdventureFrancois Gabart and his 30-meter trimaran Macif broke the solo around-the-world speed record in December 2017 with a 3Di mainsail that had 45,000 miles BEFORE the start of his record run. 3Di powered all three around-the-world speeds records currently ...read more

01-Hanse_Emotion_6

Hanse’s E-Motion Electric Rudder Drive

When news that Hanse Yachts had launched a new form of electric-powered yacht first broke in the winter of 2016, it was widely reported. After all, Hanse is one of the world’s biggest builders of sailing boats, so this had the feeling of a breakthrough to it.After nearly a year, ...read more

TOTW_PromoSite

SAIL's Tip of the Week

Presented by Vetus-Maxwell.Got a tip? Send it to sailmail@sailmagazine.comDefusing the Run It’s been said with justification that gentlemen don’t boast about how windy it was, but the shape of my ensign in the photo will give well-informed readers a fair idea. They will also ...read more