henan okay.com: hdpe sheets. 5 Pack 12 x 12 x.125 Black HDPE Sheets, Great for DIY Projects for Home and Marine Applications, Black Plastic Sheets, High Density Polyethylene Sheets, Made in USA. 4.4 out of 5 stars 568. $22.99 $ 22. 99 ($4.60/Item) Get it as soon as Wed, Apr 20. FREE HDPEpping on orders over $25 HDPEpped by henan okay.