Sorry for the bother, could you please re.-confirm the spray for curtains including approximately the coverage per it really and the cost ? Thank you for your help Kind Regards Corrado
Hydron Nu-Flame Synthetic & Fabric Protector or and Bollom Flamebar PE6 all mention curtains as a suitable substrate. They're available, with other fire retardant treatments, with next day delivery. Estimated coverage rates can be found in the Technical Data Sheet for each product available to download from the 'Attachments' tab on each product page.