Cold Welding Cold Welding ELSHARARA (Materials) (OP) 26 Dec 17 08:40 Dear All. Is it allowed to use cold welding (Belzona) to fill in holes inside Dehydrater. appreciate your reply. Thank you RE: Cold Welding metengr (Materials) 26 Dec 17 13:40 Not for structural purposes. RE: Cold Welding Dhurjati Sen (Materials) 28 Dec 17 07:30 [quote ELSHARARA][fill in holes inside Dehydrater] I guess you mean pits. They could be shallow or deep. For deep pits, there is a calculation if repair is required as per API 510. However, applying belzona is common and easy (temporary measure) but I always prefer weld build up (permanent)! RE: Cold Welding ELSHARARA (Materials) (OP) 28 Dec 17 07:54 Thank you for your replies.