Your Rope Has a Coating You've Never Noticed. Here's What It Does

Every rope that lands on my bench has done its job and then some. Some are stiff with age. Some still smell of chalk. And every now and then one still has a faint waxy feel to the sheath, even after years on the wall. That is not dirt. That is what is left of the rope's dry treatment, a coating almost nobody thinks about until it is long gone.

I only really started noticing it once I had a bench full of retired rope in front of me. Some sheaths feel slightly slick under a thumbnail. Others feel raw, almost fuzzy. Same rope type, same age, completely different feel. That difference is the coating, and how much of it is left.

What Is Dry Treatment on a Climbing Rope?

Most climbing ropes get a coating on the sheath, and on some ropes it is worked right into the core fibres too. It is usually a silicone or fluorocarbon based finish, the same idea as the waterproofing on a jacket. It does not stop water landing on the rope. It stops the fibres soaking it up.

A dry rope sheds rain and snow instead of drinking it in. An untreated rope acts more like a towel. It grabs water, gets heavier, gets stiffer to handle, and in cold enough conditions it can freeze half solid.

Do You Actually Need a Dry Treatment Climbing Rope?

Here is the honest answer. It depends what you are doing with it.

If you are heading up an alpine route, an ice line, or a long wet multi-pitch, a dry treatment climbing rope earns its higher price. A soaked, frozen rope is miserable to handle and a lot heavier to haul up a route. If most of your climbing is a dry crag, an indoor gym, or a sunny sport route, save your money. An untreated rope will do the job exactly as well and cost less.

The Coating Wears Off Long Before the Rope Does

Whatever coating a rope starts with does not last forever. Washing, UV and ordinary use rub it away, the same way a jacket loses its waterproofing after a few years of wear. There is a right way to wash a climbing rope without wrecking it, but even a careful wash still takes a wee bit of the coating with it. Climbers who really rely on it can buy a wash-in reproofing treatment, same idea as reproofing a jacket. Most people never bother. Eventually a treated rope and an untreated one end up behaving much the same, wet or dry.

Why a Retired Dry Rope Is Lovely to Work With

By the time a rope reaches my bench it has usually retired after five to ten years of use, more washes than anyone counted, and a fair bit of weather on top. Whatever waterproofing it left the factory with is mostly gone by then.

From where I am sitting, that is no bad thing. A sheath with no slick coating left on it takes a needle, dye and glue far better than one straight off the shelf would. So the same years that end a rope's climbing life are what make it easier for me to turn into something new. A recycled climbing rope belt, a rope keychain, a set of rope coasters, whatever that rope has left in it once the coating has worn away and the fall count is done. If you are stuck on what to get someone, a Forma gift card lets them pick for themselves.

Stay classy and remember,
Make Waste Useful.

George