Highside Chemicals "Leak Lock" Joint Sealing Compound — "Locks Out Leaks". 4 fl oz (118 mL) brush-top jar, blue compound. Made in USA in Gulfport, Mississippi. Manufacturer Part No. HS10004 (Grainger/Zoro 30ZY82). UPC 684176100049. New, factory-sealed jar with intact safety seal under cap.