Enduraflex RC612BNECured Enduraflex, black soft, high-quality, cured neoprene for field lining and repair. FDA compliant. For more information about this product, complete the form below or call 800-321-5583. Specs: Application: Field Lining, Repair Durometer: 55 to 65 A PDF Downloads: Spec Sheet (PDF) Notice: JavaScript is required for this content.