2 Pack Thread Locker – Blue 243 (Medium) & Red 271 (High) – Metal Screw Locking Sealant for Bolts/Nuts/Fasteners – Prevents Loosening/Corrosion

Customers find the thread locker works well, particularly on bicycle crank nuts, and appreciate its good quality and value for money. The product is easy to use, with one customer noting it's not messy at all. The bottle size receives mixed feedback - while some find the bottles decent-sized, others complain about the large bottles containing very little product. The bonding strength also gets mixed reviews, with some reporting good bolt/screw hold while others mention issues with screws not staying in place. Several customers report receiving bottles that were nearly empty.