BK&W FiberLock Head Gasket & Block Repair, 32 Fl Oz ReviewbP PP K&W FiberLock Head Gasket & Block Repair, 32 Fl Oz PRepairs head gaskets, engine blocks intake gaskets, cylinder heads, freeze plugs, heater cores and coolant leaks on cars, trucks, and busesPAll metal parts, most plastics, and painted surfaces.