Ceconite 101-3 vs 101-4

[user 38]

I ran short of the -3 while covering a wing today and ran to Wicks and picked up what I thought would be -3. But instead, its marked -4 and I am told it is apparently the -3 replacement.
I noticed right away that getting the adhesive to penetrate and wet through took a lot more effort. Has anyone got the dope on the -4 stuff and whether it behaves differently in any way from -3?

Thanks
D

 

[Neil]

 

[user 38]

 

[Neil]

 

[Larry Lyons]

 

[Pittspowers]

 

[taff]

 

[user 38]