I need to fill/level an old sunken fireplace hearth in our living room ready for a carpet to be fitted in there this week. I was about to purchase some self levelling compound when my father insisted on using some old Sika Pave Fix compound he had lying around saying "it'll do the job". It has filled the hole and levelled the floor but the chemical smell is very strong and I'm now worried it shouldn't be used in unventilated areas. There's no information on the product sheet about use indoors and I was wondering if anyone had any knowledge on this please? Cheers