Overview Reviews Product Description This blue sealant is excellent for sealing water, air, steam, natural gas, refrigerants, gasoline, and ammonia. Leak-Tite® Blue is also ideal for use on production lines and fabrication shops. Markal - TEMPIL - LA-CO Catalog Product Videos Custom Field Product Reviews Write a Review Write a Review × Markal 1 Pc. Leak-Tite® Blue Industrial Thread Sealant 16oz Can MAR 46009 Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Review Subject * Comments *