Dear Khun Sak,
I already submit PDS of SikaBoom to Sino Thai and talk with them the warranty and shelf life property of product is 1 year refer PDS.
So the customer ask for warranty longer than PDS and let me know they discussed with you and you OK,
that the first i will try to phone back with you but you are not reply me,
please let me khow about story of you discussed with customer because they still waiting you latter ka.