no doubt you've got the wrong thickness, there are a number of different, from 1/32" up, maybe you have an auto glass shop around with thinner stock .... or use black silicone

Bill

Moved over to the Passing Lane

"When we tug a single thing in nature we find it attached to the rest of the world" John Muir
"When we tug a single thing on an old truck, we find it falls off" me
Some TF series details & TF heater pics & Rust-a-holics Unanimous parking lot