Best why to check brake fluid leak
I think the leak is the rear back line going to
the drivers back wheel it's a slow leak need
some advice is.there a.solution I can ad to
the brake fluid to stop the leak is
Better to get the leak fixed, it may just be a brake cylinder. They don't make anything like a quick-fix "stop-leak" additive for brakes for obvious reasons.
If its leaking there will be brake fluid (wetness) somewhere along the line. Follow the brake lines to the back, where its wet, its leaking. If a line is leaking it needs to be replaced. If not check the calipers. If there's wetness around the seals, they're leaking and need to be replaced.
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