I would not recommend Reflectix in this application.
Black but you should seal it with joint filler which comes in other colors.
I used this for an interior slab and it worked great. I like that you can tear off the top 1/2” afterward and caulk the joint
We do not currently have this product in a white.
Yes it will work as a filler.
Our product would not work in this application.
the only way you would need to have a gap of at least the thickness of the reflectix between the slabs and then push it down in between the slabs and if its tight spray some type of lubricant between slabs
Yes but joint space should be too wide. Expansion joint expands out of space if too wide. I double expansion joint material in few spots and used joint filler compound to hold in place
Yes, you can use the joint strips to fix the indoor garage wall or floor. Cut it to fit in the gaps.
yes it is an exellent product to use for expansion joints