Glycerin Couplant

Glycerin can be used as a general purpose couplant. The viscosity and acoustic impedance are desirable for rough surfaces and highly attenuating materials. Glycerin has an acoustic impedance of 2.42 x 105 gm-cm2/sec.

Glycerin is also suitable for use in high frequency delay line inspections, high frequency delay line thickness gaging and contact transducer testing on reference standards.


  • Echo Ultrasonics is approved by GE as a supplier of Glycerol batch # 205 for the inspection of CFM56-7B engine fan blades in accordance with SB 72-1033.  Available in 16-oz / 500 ml bottles, part number GLY-16, batch # 205.

  • Packaged from USP Glycerin, 99+%
  • High acoustic impedance
  • Medium viscosity fluid
  • Will not harden on equipment
  • Compatible with plastics


  • Non-toxic, non-irritating
  • Contains no heavy metals, harsh surfactants, glycol ethers, nitrites, silicones, dyes or fragrances.


  • Can be completely removed with mild detergent and a water wash, or water wash alone.


Glycerin can be corrosive to carbon steel and aluminum

Total Halogens ……………….. < 50 ppm
Sulfur ………………………………. < 50 ppm

  • GLY-4CTN: Carton of (12) 4-oz/118 ml bottles
  • GLY-1: 1-gallon/3.8 liter cubitainer, one refillable bottle
  • GLY-5: 5-gallon/18.9 liter cubitainer, two refillable bottle