If you buy Loctite 243, or any other Loctite product... always look at the expire date! Some stores sell their expired products at lower prices... This date is always printed on the bottle, in most cases at the bottom. The expected result / strength is guaranteed until that date... afterwards the product will be unreliable for critical applications. Also, select the correct Loctite nr, becasue this is related to the strength! Loctite 222 = low strength (but vibration resistant!) Loctite 243 = medium strenth, still removable with normal tools. Loctite 270 (or 2701) = high strenth, only removable after heating up! Ideal for studs. Good luck! Wim, Loctite Automotive Engineer :)