Clearance PPSU Sheet Shop for PPSU overstock, remnants, and drops. PPSU (polyphenylsulfone) (Radel® R) is a high temperature thermoplastic material with outstanding impact resistance. Radel® R is resistant to hot water and steam and can withstand repeated cycles in a steam autoclave. Please note: Discount is reflected in product price, and clearance quantities are limited. While we update our clearance inventory daily, in rare instances our website may not reflect a very recent sale. We will contact you promptly if an item you ordered is no longer in stock. Can’t find what you need? Shop all PPSU Materials or Get a Quote. We cut everything! Select your item, give us your cut requirements, we'll do the rest. Compare products selected. Clear List Prev Page - Next Compare products selected. Clear List Prev Page - Next Prices and product availability are subject to change without notice. Clearance materials are not available for pickup, are excluded from online promo code discounts, and are not returnable.