Originally Posted by bearisgray
The directions for both say to use HOT water (140 degrees F., 60 degrees C)
The instructions for Retayne suggest treating the fabric BEFORE cutting it.
Retayne - soak fabrics for 20 minutes in hot water, then rinse
Synthrapol - soak 10-12 minutes in hot water, then rinse.
As far as I can tell from that info, they are NOT interchangeable.