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February 2024 by mike check
The Best product to remove stubborn rusted nuts or bolts and more Great Company Awesome Products Thank you Marilyn Ryan and Derek.
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May 2021 by Keith Vasicek
Have only used Hapco products on my antique tractors. Although I've never had the need for stop leak products, the items I use are; Lead additive, fuel/carburetor cleaner/fuel system lubricates, friction modifiers, crank case oil additives, assembly lube and penetrating lubricant. I wish I knew about Hapco sooner, their products are FAR superior to anything else out on the market! I'm just thankful my local specialty auto store (Richard's Auto Parts, New Baltimore MI) carries everything in stock! Hapco rocks!
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June 2020 by Jeff Davitz
Half a bottle (recommended amount) in my gearbox stopped a leaky output shaft seal!! The leftover was split between my engine & steering...THANKS A MILLION!!!!
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February 2020 by Scott W. Moore
I bought this product to try in my old IH Cub Cadet. The hydro unit had a pretty decent drip and this appears to have solved the issue.
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February 2020 by Nick S
I tried hapco pro seal in my 93 f150 that I sold that had a rear main seal leak it stopped the leak in 4 days I traded it for a 94 jeep grand cherokee a week and a half ago and I'm going to be using hapco products to keep my jeep leak free!
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November 2019 by Shar Rux
this is my second bottle I have used on a different vehicle, so I am 2 for 2 ty Hapco.
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October 2017 by Mancer Holmes
More than excellent products.
