Aliexpress
Click here… to search for 2m Self Adhesive Foam Seal Ring Tape EPDM Rubber on Aliexpress
Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China. Only one coupon available!
Link: Banggood product page
Coupon (3.75 USD): BG00c906
(CouponsFromChina.com tip: just apply this code in your cart after clicking “Proceed to checkout”. Click to copy code and open shop)
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): BG3d60bd, Cuponation9
(these coupons are old, so probably won’t work)
Price history and price alert
Here is price history (for all/most countries) for 2m Self Adhesive Foam Seal Ring Tape EPDM Rubber.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).