Corrosion block waterproof grease Corrosion Block Waterproof Grease out performs lithium and most synthetic greases, and meets or exceeds requirements for NLGI Service Classification GC-LB (automotive wheel bearing and chassis lubricants) confirming to ATMD4950 performance requirements.• WATERPROOF• Multi grease compatible• Excellent thermal / oxidative stability• Resists bleeding / melting at high temperatures • Dielectric / non-conductive