XRD-Amorphous materials

I am interested in sealing some air-sensitive samples inside of xrd-amorphous material to allow for XRD and hopefully XRD-texturing analysis. Of course, Kapton is the common material used for this purpose, but I am unaware of a good way to seal two pieces of kapton together. Impulse sealers (ie [here](https://www.uline.com/Product/Detail/H-190/Poly-Bag-Sealers/Tabletop-Impulse-Sealer-12?pricode=WA9036&gadtype=pla&id=H-190&gclid=EAIaIQobChMIjrHA3LOW3wIVkp-fCh3GSwu5EAQYASABEgIldPD_BwE&gclsrc=aw.ds)) are commonly used for creating plastic seals in food processing. However, they don't reach a high enough temperature to melt Kapton. I also tried to just heat the kapton with a soddering iron, to no avail. Are there other materials that maybe suitable for sample storage during xrd ?


