fireproof gap tubes

[spacecowboy]

I've turned into a scratch monster.
The latest roc is gap staging, main tubes out of TP tubes, and gap/mmounts out of glued computer paper.
What can I spray (apply) inside the gap tube to fireproof it, something as simple as paint ?
Thx

 

[sandman]

spacecowboy,

Totally Tubular has foil lined BT-50 heavey walled engine tubes...sounds PERFECT!

https://www.buyrockets.com/buyrockets/tt.html

He hasn't had a chance to list them on his site yet but, the particulars are:

T-50MF
(foil lined heavey wall T-50, I.D. 0.984", O.D. 0.9992" , .021" wall 34" long)

$3.00 each or $2.75 each for 25 or more.

sandman