There are both Steam a Seam Lite and Steam a Seam 2 Lite.
Is what you got double-sided? Meaning peel-off paper on both sides? It should work (but be gentle when repositioning pieces). That would be Steam a Seam 2 Lite.
If it's the single-sided product, you won't be able to temporarily stick the pieces, so that can't be used easily for the collage method. That would be Steam a Seam Lite.
The "2" in the product name means double-sided sticky. The "Lite" in the product name is the thickness/stiffness of the web.
Which did you actually get? Is there peel-away paper on both sides?