On exactly 5 May, the endurance test that is set to run for 5 years was started. That said — after 4 weeks, it was impossible not to go and take a look.
The test concerns breaking strength after prolonged outdoor exposure — from 6 months up to 5 years.
The details can be found here
Back to today, 30 May 2026.
This is what the HMPE looks like now:
Noticeably lighter in colour than 4 weeks ago:
It is still too early in this test to assess the effect on breaking strength, but it is clear that the effect on the coating is significant.
The breaking strength test in 5 months' time will therefore be very interesting.
Also of interest is a comparison of the different coatings. What happens to Dyneema SK75 with a gold coating? And to the T70 with a silver coating?
That will be investigated in a new test, comparing the effect of UV light — in the form of 24-hour outdoor exposure — on those 3 different ropes.
Once the test data and information are available, the link will be posted here.
In the meantime, do you have questions about HMPE or about our tests? Get in touch via info@prorope.com