How well does this work with ethanol-based fuels?

Absolutely fine. I sealed the steel tank on a 1986 F150 that I fill religiously with 87 10% ethanol. Hasn't leaked in over a year.

How big of an area will one kit repair? Example 4 x 6 inches etc?? Thanks -Mike-

If you need the fiberglass patch, I think it was about 2"x4". If you're just using the epoxy, it will cover more area - probably a 10"x10" area or even larger if it doesn't need to be too thick. Just a word of caution that once you start mixing the 2 chemicals it starts to harden within about 15mins, so you don't have a lot of time to delay. I learned this the hard way. :(

Antique oil lantern with leaky reservoir about 2 inches in diameter. There are several pinholes in the steel. Will this coat the entire bottom?

Yes it should ,but you must make sure it is clean and all the oil is removed. Or it may not stick to metal. . I don't know if it's permanent. I did my gas tank 5 years ago and I see a drop under the car

How well will this product hold up to vibrations? I have a fuel tank on a generator with a crack which meed fixing

I would say pretty well. If properly applied it dries just as hard as regular JB Weld. Used the fuel patch on a tank for an old farm truck, didn't leak for the two years I had the truck.

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J-B Weld 2110 Metal Fuel Tank Repair Kit, Gray

Product ID: 264507589

Details

Brand
J-B Weld
Item form
Putty
Material
Metal
Special features
Extra Strong
Specific uses for product
Automotive

🔧Permanent metal bond

⏱️Sets in 1 minute

🛢️Fixes holes up to 3/8" diameter

Description

🛠️ Fix it fast, fix it forever — the pro’s secret weapon!

RAPID CURE TIME - Epoxy sets in just 1 minute for fast repairs
COMPLETE PRO KIT - Includes epoxy putty, fiberglass cloth, sandpaper & applicator
VERSATILE RELIABLE - Ideal for gas tanks, oil pans, and metal repairs
NO TANK REMOVAL NEEDED - Stop leaks without dismantling your fuel tank
UNMATCHED STRENGTH ZERO COMPROMISE - World’s strongest bond trusted for 40+ years

J-B Weld 2110 Metal Fuel Tank Repair Kit delivers a professional-grade, permanent repair solution with an ultra-strong epoxy putty that bonds metal surfaces instantly. Designed for quick, no-tank-removal fixes on holes up to 3/8" diameter, this all-in-one kit includes fiberglass cloth, sandpaper, and applicator for a seamless, durable repair trusted by mechanics and DIYers for over 40 years.

Specifications

ASIN	B01IOPE65M
Best Sellers Rank	#17,631 in Automotive ( See Top 100 in Automotive ) #2 in Car Fuel Tanks
Brand Name	J-B Weld
Color	Gray
Compatible Material	Metal
Container Type	Kit
Customer Reviews	4.3 4.3 out of 5 stars (1,346)
Global Trade Identification Number	00043425021106
Included Components	Epoxy Putty^Fiberglass Cloth^Sand Paper^Applicator
Item Form	Putty
Item Package Quantity	1
Item Type Name	Metal Fuel Tank Repair Kit
Item Weight	40 Grams
Manufacturer	JBWeld
Material Type	Metal
Model	2110
Number of Pieces	1
Other Special Features of the Product	Extra Strong Bonding
Part Number	2110
Specific Uses For Product	Automotive, Marine
UPC	043425021106
Unit Count	1 Count
Warranty Description	as listed
Water Resistance Level	Waterproof

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