Review on 🔧 Permatex 59214 High Temperature Thread Sealant - 6ml Tube, Pack of 1 - White: Efficient Solution for Airtight Sealing by Will Rahman

As the name suggests, I use this material everywhere. Wherever there is a fluid fitting, Permatex thread sealant goes there. It absolutely prevents any leakage, especially with coolant fittings, prevents corrosion and abrasion, saves threads and makes subsequent disassembly much easier. It doesn't heal instantly so you'll have to wait a bit before using it, but the end result is totally worth it. As far as I know this is a must have for any engine job.