How to test open time of HPMC
HPMC for cement tile adhesive
construction norm : open time 25 minutes ;
determination of open time : the time after wich at least 40% of the mortar remains attached the tile.
slip test 0 mm: Sliding rate of hard burned tiles 10x10 cm is determined on a vertical concrete . the tile is loaded by 200 gr until 350 gr after 2 minutes for 30 seconds , the test measures the slip of the tile in mm .Norm max 0,5 mm .
WELCEL HPMC with long open time and sag resisitance will meet all your requirements.