Any chance you recall what size you picked up? I got what I thought was some durable reflective tape that showed similar favorable results but the adhesive was not strong enough to last 2 months of heat.
I used 1/2 " and 1" pre-slit non-adhesive foam tubing and put the 1" over the 1/2" where it seals against the hood and over the intake tube. Then stuffed the gaps at the bottom of the JLT partition with the 1/2" foam.