They are both Dried Refractory Mortar which is finely powdered and has to be mixed with water or other matters for different purposes, like Soda Glass and Wet Refractory Mortar which is instantly mixed and ready to use.

BRAND			MORTAR 1			MORTAR 2			Mortar for Insulating Bricks
PROPERTIES			HM-30	HM-32	HM-34	HM-43	HM-36	HM-38	AM-30W	AM-43W	PM-80
PHYSICAL DATA (Typical)
Refractoriness,SK (Seger Cone)			30	32	34	34	36	37	29	32	38
Approximate. Amount Required per 1000,9"
Equivalent (Thinly Troweller Joints) kgs.			140-180	140-180	160-200	160-200	170-210	165-210	180-230	160-200	180-270
Approximate Amount of Water for Trowelling
Consistency (Dry only) Litres/50kg.			20-25	20-25	20-25				20-25	20-25	20-25
Modulus of Rupture at joints, After Drying
at 110 oC,kg/cm2									15-30	15-30
Refractoriness Test
Mortar does not squeeze or flow from joints
when heated at, oC oC			1400	1400	1600	1600	1600	1600
CHEMICAL ANALYSIS, % Approx.
Silica (SiO2) %			63.5	56.7	51.2	50.0	31.4	27.2	54.1	47.9	11.4
Alumina (Al2O3) %			27.6	32.1	40.3	43.6	62.5	70.0	35.2	46.4	80.5
Iron Oxide (Fe2O3) %			2.2	2.0	2.0	2.0	1.9	1.2	2.0	1.9	1.5