Alvin 24oz Lab Metal Durable Economical Repair Putty Dent Filler & Patching Compound Epoxy

This stuff is amazing for filling in cast iron castings or fairing out other metal work. Pinholes and other defects are easily filled. I found that pure acetone easily thinned the product without the need of buying the pricey thinner. I had the best luck mixing it really thin and literally painting it on the parts. High spot? Brush over it with thinner to smooth it down. Low spot? Brush over it with more Lab Metal to build it up. Great stuff.

for auto rust repair

Works great for filling patches; permanent repair unlike Bondo which can crack; be sure to buy solvent, because lab metal dries very quick and can't be handled after about 5 seconds unless you spray solvent on it.

I needed a product to fill a small, quarter-inch crack in a hot water boiler system. Water was leaking out of the cast iron boiler onto the basement floor. Boy, what a mess for such a small crack. Lab-Metal filled the crack and stopped the leak. It got me through the entire winter and saved me big dollars until I could afford to replace that boiler in July of the following year. You should also buy Lab-Solvent when using Lab-Metal which will assist in thinning out the material so that it can be applied much more easily.

Works great fills in little divots easy to work with

Used to repair small rust holes in my tractor deck. Did the job, but not the easiest to work with as it starts to harden as soon as you open the can. Whatever you have to do, do it quickly!

Use this for repairing metal gas tanks. Bonds tight and never leaks. Great Stuff

It works excellent,would suggest thinning it a little for a smoother finish especially if the metal is pitted