Please note that all kevlar products are effected by strong UV light and will lose strength if left exposed to UV for long periods. Kevlar will also degrade rapidly in contact with chlorine so avoid contact with bleach and chlorinated water.
Please also note that “flame resistant” does not mean the same as “flame proof”. These threads are designed to work with flame resistant fabrics - they are not fire-proof, they are flame resistant and will withstand reasonable exposure to flames and high temperatures when embedded in fabrics (i.e. sewn with).