This is the 15248th most frequent Polish word.
silikonowej
"Silicone" (adjective form, relating to silicone).
In this sentence, 'silikonowej' describes the material of the seal that is made of silicon.
Kupiłem uszczelkę silikonową do naprawy kranu.
I bought a silicon seal for repairing the tap.
Here, 'silikonowej' modifies 'formy', specifying the material the baking mold is made from.
Mama używa silikonowej formy do pieczenia ciastek.
Mom uses a silicone mold for baking cookies.
The word 'silikonowej' pertains to 'taśmy', indicating that the insulating tape is made of silicone.