Reddit reviews Lineco See-Thru Polyester Mounting Strips, 12 inches, Package of 60 (L533-4020), Clear,
We found 1 Reddit comments about Lineco See-Thru Polyester Mounting Strips, 12 inches, Package of 60 (L533-4020), Clear, . Here are the top ones, ranked by their Reddit score.
Conservation quality mounting stripsProvide full length supportArtwork lays perfectly flatEach strip measures 12 inchesIncludes 60 strips
I would buy the biggest photo corners your mat will allow for. That should help hold it initially and then once it's in the frame for a while it should be fine. And I would leave the back accessible (don't staple on paper or whatever) so you can easily fix if it does slip.
Edit: You can also use something like this on the edges. Basically the same concept as photo corners.