Ultrasonic Couplant Comparison

	General Purpose Couplants					Extended and Extreme Temperature Series
Product	Ultragel II	Sonotrace Gr 30	Echogel Gr 20	Soundsafe	UT-X Powder	Sono 600	Sono 1100	Pyrogel Gr 100
Temperature Range a	-10 to 210 °F -23 to 99 °C	25 to 175 °F -4 to 79 °C	27 to 140 °F -3 to 60 °C	0 to 200 °F -18 to 93 °C	32 to 120 °F 0 to 49 °C	0 to 700 °F -18 to 371 °C	700 to 775 °F 371 to 413 °C	-5 to 805 °F -45 to 429 °C
Corrosion Inhibition b	90	80	65	75	10	100	N/A	100
Relative Viscosity c	4	4	6	4	1 to 7	6	N/A	10
Actual Viscosity (Brookfield)	∼80,000 cps (Helipath Spindle E @ 1.5 rpm)	∼65,000 cps (Helipath Spindle E @ 1.5 rpm)	∼75,000 cps (LV #4 @ 6 rpm)	∼80,000 cps (Helipath Spindle E @ 1.5 rpm)	Variable by altering water amount	∼500,000 cps (LV #5 @ 1.5 rpm)	N/A	>4,000,000 cps (LV #5 @ 0.3 rpm)
Long Velocity (x105 cm/sec)	1.62	1.52	1.55	1.64	1.51	1.50	N/A	1.20
Impedance (Mrayls)	1.80	1.55	1.60	1.72	1.53	1.37	N/A	1.35
Acoustic Performance d	85	55	50	80	40	70	N/A	55
Typical Max Halogense	<50 ppm	<50 ppm	<50 ppm	<50 ppm	<50 ppm	N/A	N/A	N/A
Typical Max Sulfure	<50 ppm	<50 ppm	<50 ppm	<50 ppm	<50 ppm	N/A	N/A	N/A
Water Solubilityf	90	90	80	90	80	20	0	10
ASTM F519	✔		✔
ASTM F945-PWA 36604	✔
PWA 36700	✔			✔
BAC 5968	✔	✔
BAC 5980	✔
BAC 5439-PSD 622	✔		✔

^a For thickness gaging (lower maximum for flaw inspection)

^b Duration of ferrous corrosion inhibition (mild steel & cast iron): 100 = long term protection, 80 = 60 days-steel, 14 days - iron, 60 = 30 days - steel, 7 days - iron, 40 = 7 days - steel, 2 to 8 hours - iron, 20 = 8 hours-steel, 0 to 2 hours - iron, 0 = no inhibition, like plain water.

^c 10 = thick paste, 5 = slow flowing gel, 0 = water

^d For thickness gaging (lower maximum for flaw inspection)

^e Typical values only, request current C of A for actual values

^f 100 = easiest to remove with appropriate solvent, 0 = difficult to remove even with solvent and scrubbing

N/A = Not Available, Information in green indicates best estimates.