: Look for "UV stabilized" versions if the plastic will be used outdoors for long periods to prevent yellowing or brittleness.
: Home Depot and Lowe's are the most common sources for standard white 4mm sheets. They typically stock 24" x 36" and 48" x 96" sizes. where to buy corrugated plastic
: Ace Hardware often carries Plaskolite single sheets, while Tractor Supply Company is a reliable source for larger bulk packs, such as 10-packs of 48" x 96" sheets. : Look for "UV stabilized" versions if the