ME AND MY SON STARTED WORKING ON A 4" SEWER LINE 30 FOOT LONG SO WE DUG 4X4 HOLE FOR ACSESS TO BLOW THE LINER IN TO SEWER EVERY THING WENT GREAT 6 HOURS LATER MIX DIDNOT DRY WE WERE SOLD A BAD MIX SO WE HAD TO DIG UP SEWER LINE AND REPLACE NOW I CHECK MY MIX BEFOR ALL JOBS AND WE DID...