Tube Bending- SAND? , Asphalt inside ?

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Anyone use stuff like this to keep the tube from collapsing  or kinking ?I think brass  musical instrument makers use something... like pitch, tar, asphalt ...Weldandpower Lincoln 225 AC,DC with Briggs 16hp gas engine.WW2 era Miller TIG.
Reply:i just use a mandrel bendertackleexperts.comwww.necessityjigs.comhttps://www.facebook.com/groups/mach...dingequipment/
Reply:Just fill with sand and weld caps on the end. Then I won't collapse when bending.Tiger Sales:  AHP Distributor    www.tigersalesco.comAHP200x; AHP 160ST; MM350P,  Spoolmatic 30A; Everlast PowerTig 185; Thermal Dynamics 60i plasma.  For Sale:  Cobra Mig 250 w/ Push-pull gun.  Lincoln Wirematic 250
Reply:I also now remember someone needing to bend a tube inside another tube and them not be touching inside... they used sand for that...Weldandpower Lincoln 225 AC,DC with Briggs 16hp gas engine.WW2 era Miller TIG.
Reply:I've used salt in smaller tubes.  That way you can rinse it out when sand can get stuck.
Reply:Cool.. thanks guys....Weldandpower Lincoln 225 AC,DC with Briggs 16hp gas engine.WW2 era Miller TIG.
Reply:We used sand years ago it was the thing 20 yrs ago when you could'nt afford anything hydraulic. It was good to know and it works!wbolden
Reply:You might look up Cerrobend.  It is an allow that melts around the temp of boiling water.