It's too early to tell if it will stop the gear seal leaking, but it's definitely made the diff quiet. I'm impressed with how quiet it is and makes me think you'll want to use it in something that leaks to reduce normal wear and tear.
Bar'S Leaks MS-1 Main Seal Motor Oil Leak Repair, 32 Fl. Oz
12 Review
Rislone 4416-6PK Smoke Repair: 16 Oz, 6 Pack - Seal Rings Quickly & Effectively!
12 Review
Bar'S Leaks High Mileage Cooling System Repair, 16.9 Oz
23 Review
π Liqui Moly 20040 ATF Additive: Enhancing Performance with 250 ML Power Boost
11 Review