Removing proseal
 

Hi,
I needed to do this for a leaky tank baffle; I haven't tried the Vans stuff but if you can obtain some 'Skyrestore' from https://www.socomore.com ? Surface preparation ? Sealant removal

This does the job, although you need several applications to remove a little at a time- it's quite time consuming.

The only chemical that will touch cured Proseal is MEK. It is horrible, nasty stuff, be very careful. Use a mask and gloves. Cut off as much as possible then use MEK on a rag to rub off the residue, use it sparingly.

PolyGone Gel
 

For reference, here's a link to the PolyGone Gel 310-AG Polysulfide Stripper sold by Van's.

https://shop.vansaircraft.com/cgi-bi...oduct=polygone

Remove with MEK
 

Hi,
I can't agree, it will take forever !!