Is sunscreen bad for your rope? The UIAA claimed that it is, even up to 40%. After investigating this, we found no research has been done on this topic and those claims were completely made up. So we tested 9mm Sterling Safety Pro (nylon) with a MBS of 19kN after being soaked in 8 different sunscreens for a month. The two most concerning ingredients according to the UIAA were denatured alcohol and avobenzone, so we tested them in isolation. After 3 samples each, a total of 33 break tests, THE ROPE DID NOT BREAK BELOW MBS ONCE. Watch the Full video on Youtube! The UIAA’s Instagram article https://www.instagram.com/p/DKppjZIMl1A/ The UIAA’s Blog https://www.theuiaa.org/uiaa-safecom-answers-your-questions-suncream-and-climbing-gear/ The UIAA’s contact information is office@theuiaa.org please email them this: ——————————— Dear UIAA, After reviewing HowNOT2’s sunscreen episode where they tested to see if sunscreen weakened ropes, we are requesting that you take your Instagram post down found at https://www.instagram.com/p/DKppjZIMl1A/ and the blog post about it at https://www.theuiaa.org/uiaa-safecom-answers-your-questions-suncream-and-climbing-gear/. The UIAA is very important in our climbing community and its recommendations need to be rock solid. Those articles are spreading misinformation. There are plenty of things to be worried about, let’s worry about the right things. Sincerely, Your name —————————— We will remove this call to action once they have removed them. We tested this rope https://hownot2.com/products/safetypro-static-rope Our data, from tests we actually did, can be found at https://hownot2.com/pages/sunscreen