Sorry, but the ONLY safe thing to do is replace the brake line. JB weld is great stuff, but not on the most important part of controlling your car. Don’t even use a compression fitting on your brake system. You will press on the brakes as hard as you can in a panic stop situation.Click to see full answer. Furthermore, will JB Weld hold up to brake fluid?Brake fluid will not eat through JB weld. If you want to replace that part, Its a generic Nissin part found on most bikes!Additionally, can you repair brake lines? Leaking brake lines are common in cars in areas with snow and ice. This is because of the salt used on the roads as it causes brake lines to decay. The best thing you can do to repair leaking brake lines is to replace them. It’s a fairly straightforward auto repair you can DIY. Consequently, can you duct tape a brake line? Absolutely not. I’ll grant you that duct tape is an amazing product. It can be used in everything from outerwear to appendicitis surgery. But it can’t fix your brake lines.How much does it cost to fix brake line?You may not be able to brake very well, or at all, and you need to get it fixed right away. You will pay somewhere between $150 and $200 for a brake line repair. The parts will only cost you $30-$50, but the labor costs will be somewhere in the $100-$150 range.