JB Weld & JB Stick Weld
There are various flavours of JB Weld. This review is about the classic form & the convenient JB Stick Weld.
This is a top product. I tried various radiator sealants but non could fix a tiny pin hole nor a larger 0.5mm pin hole leak. Welding with flux also failed as I could not clean the radiator surface sufficiently (radiators are very fragile).
Following the instructions carefully, JB Weld works like a wizard. A £2 fix for my LDV Pilot van radiator.
Quick, easy and clean. J-B STIK Weld is a hand kneadable, steel-reinforced epoxy putty adhesive/sealant that will plug holes and make permanent repairs on wet and dry surfaces. It will even cure completely submerged in water or GASOLINE! Simply knead thoroughly, with your fingers, a portion necessary for the repair and apply. J-B Stik will fully cure 20-30 minutes; and can be drilled, sanded, filed, tapped, machined, and painted. J-B Stik requires no tools or "prep time", and makes no mess.