Created with Eselt - eBay Listing Template Editor eBay.co.uk Give us a call Send us a message Created with Eselt - eBay Listing Template Editor - Our Store - Seller Profile - Feedback - About us - Contact Created with Eselt - eBay Listing Template Editor C-Tec CT1 Miracle Seal Leak Heating Sealer Corrosion Treatment 250ml 1/3/6/9/10x Description: The C-TEC Miracle Seal repairs leaks instantly and is guaranteed not to clog up the system. Miracle Seal is a revolutionary, scientifically created product to cure all water leaks in the heating system, in both open and closed systems. Miracle Seal is absolutely non-adhesive based unlike polymer based alternatives, so it is chemically impossible to clog the system. Miracle Seal will .