EnduraflexTM C413TN Chemical Cured EnduraflexTM Soft, pure gum, chemical cure natural for field lining and repair. FDA compliant when Chemcure IITM is utilized. For more information about this product, complete the form below or call 800-321-5583. Specs: Application: Field Lining, Repair Durometer: 20 to 30 A Pressure Cure: N/A Atmospheric Cure: N/A PDF Downloads: Spec Sheet (PDF) SDS (PDF) Notice: JavaScript is required for this content.