Gütermann HT3 Thermocollant HT3 HT3. To make hems on fabrics for tissue with steam iron100 % polyamide10 cm x 10 metersapplication: 1. Give the fold to the fabric with the iron. 2. Insert the thermocollant strip between the two fabrics. 3. Press the iron with steam on the fabric (150 ° C / 2 points) for about 8 seconds. Let the hem cool.