Compression-Style Tube Repair. Fast, economical tube and hose repair. Repair pinhole leaks, cracks, kinks, and rub throughs with SPLICE-LOK in air conditioning, coolant, transmission, oil, or fuel lines. Not for use in brake or clutch systems. – Permanent Leak Repair – Saves Time & Money – Use Standard Hand Tools – Straight or Reducing – Steel/Aluminum/Copper.