Years ago I used to find that two grades of Loctite were enough for most jobs, namely 222 (pink) for mildly stopping nuts bolts and screws from coming undone, and 601 (green) for permanent bulletproof fixing of loose bearings & serious jobs. Nowadays the Loctite website lists about 1,000 different grades, each with slightly different characteristics. I am finding it difficult to choose what to order. Is there anyone out there who is an expert on this topic, so can advise? This might help a lot of us.
If you really don't want it to come undone, use 638.........Good for holding bearings when they are really loose in the housing too. And to hold bearings in, in normal circumstances use 641. For normal bolt situations, I use blue 243. AL.
I've not used many types but for most bolts that I dont want to come undone I use blue 243 in a handy stick applicator.
FWIW this is what Ducati suggest for the 748 LOCK 1 Low-strength threadlocker. LOCTITE 222 LOCK 2 Medium-strength threadlocker, oil-compatible. LOCTITE 243 LOCK 3 High-strength thread sealant for threaded parts. LOCTITE 270 LOCK 4 Flange sealant. Resistant to high mech stress, solvents and high temps (up to 200°C). For pressures up to 350 Atm. Fills gaps up to 0.4 mm. LOCTITE 510 LOCK 5 Perm adhesive for smooth/threaded fasteners on mech parts. High resistance to mech stresses and solvents.Temp: -55 to 175°C. LOCTITE 128455 LOCK 6 Pipe sealant for pipes and medium to large fittings. For water and gases (except oxygen). Maximum filling capacity: dia gaps up to 0.40 mm. LOCTITE 577 LOCK 7 Speed bonder for rubber and plastics. Elastomer loaded ethylic base. LOCTITE 480 LOCK 8 High-strength retaining compound for threaded parts, bearings, bushes, splines and keys. Temperature range: -55 to 150°C. LOCTITE 601 LOCK 9 Medium-strength threadlocker LOCTITE 401 DUCATI liquid gasket part no. 942470014. Exhaust pipe paste. Self-curing sealant, hardens when heated. For temperatures over 1000°C. Spray used in treating electrical systems to eliminate moisture and condensation provides high resistance to corrosion. Waterproof. Contact Cleaner Shell Advance
No one in their right mind will buy that lot, so 638 is overspeced for most but more than suffices. Because you don't want things coming loose.
