TopShield Hardener (part B) is suitable for TopShield 2K LT line. Mind the weight! You have to add 25% of hardener (part B) in weight of coating (part A). In the "size" form, you will find the size of coating (part A), but you will receive the correct quantity of hardener (part B) - eg. for 1 kg of part A, you will find in the box 250 g of part B. For further information, consult the updated data sheet.