French cycling magazine VeloVert ('Green Bike') tested 20 sealants used today.

Full Sealants Test (pdf)

In conclusion according to Google Translate:

"The one who presented the best ratio, it is the South African product Squirt, a little better than the Stans on the pressure test point N ° 3 and obtaining the same note for drying. A product that would also be green according to the brand. A very close victory, the Squirt finished neck and neck with the Stan formula ... It was played to a pschiiiiiit in short!")