Coolant hose heat protection tube?

You can make your own custom fit. light weight, low cost, shielding -

I use malleable aluminium "flashing" which you can get from any hardware store - comes in a role.

Purchase a role of exhaust wrap and a tube of high temperature silicone - automotive store.

Measure the length of hose/tube you want to protect & diameter of the tube. Cut a slightly oversized piece of aluminium (HD/workshop sizers/shears will do the job).

(The Rotax diagram infers protection over the whole length of hose - this is usually unnecessary - targeted protection will save weight and cost)

Cut sufficient strips of exhaust wrap to cover the exact length/diameter of pipe - when laid side by side, on the aluminium, there will be a small uncovered margin on three sides.

(Good idea to wear disposable gloves from now on.)

Wipe one side of the aluminium with isopropanol/carburettor cleaner/mentholated spirits to remove any grease/contaminants.

Using the HT Silicon, liberally cover each strip of exhaust wrap and lay side by side on the aluminium - press firmly onto aluminium & leave over night to cure.

You now have a high temperature shield than can be bent/curved over the hose (exhaust wrap on the inside) and secured in place with sufficient double wrap safety wire or metal zip/cable ties.

If your measurements/cuts have been accurate, the shield will slightly overlap, along its length, helping to keep it in place. 

The shielding can be reused as many times (5 year rubber replacement) as you deem fit.

If there is a couple of inches separation then no big sweat.

One of the easiest ways to shield a coolant hose and I do this is to just take a size 14 fire sleeve. Cut it to about 3" - 4" long and slit it up the middle lengthwise. Then wrap it around the area you want to shield and use 2 - 3  plastic wire ties around the hose to hold it in place. Out of the hundreds of LSA aircraft I have seen most  have been done this way. Some use the store bought shinny heat shield with Velcro at a higher cost, but it isn't necessary. 

Roger Lee wrote:

If there is a couple of inches separation then no big sweat.

One of the easiest ways to shield a coolant hose and I do this is to just take a size 14 fire sleeve. Cut it to about 3" - 4" long and slit it up the middle lengthwise. Then wrap it around the area you want to shield and use 2 - 3  plastic wire ties around the hose to hold it in place. Out of the hundreds of LSA aircraft I have seen most  have been done this way. Some use the store bought shinny heat shield with Velcro at a higher cost, but it isn't necessary. 

Agreed Lee - unfortunate there is often not "a couple of inches separation" then a, usually short, heat shield can be useful or at least give piece of mind..

I use a lot of plastic zip/cable ties but not where I am concerned about high radiant heat, much preferring metal zip/cable ties, better still, double wrap safety wire.