Reddit reviews USA Premium Store 20pcs Blank Sealing Closed Rubber Grommets -Fits 1.5" (1-1/2") Holes
We found 1 Reddit comments about USA Premium Store 20pcs Blank Sealing Closed Rubber Grommets -Fits 1.5" (1-1/2") Holes. Here are the top ones, ranked by their Reddit score.
ok, 2 other options -
Something like this, but obviously find one the right size for the hole you're going to drill.
https://www.amazon.com/Premium-Sealing-Closed-Rubber-Grommets/dp/B074WNWMD5
And/or:
https://www.amazon.com/3M-08578-Black-Strip-Calk/dp/B000PEZ1L4
I've used both methods before with good results for almost the same application as what you're doing.