How to dissolve a strong resin in difficult situation?

The resin is made up from two components:


Component A: silicic acid, sodium salt (less than 10% sodium silicate)


Component B: Diphenylmethane-4,4'-Diisocyanate, isomers and homologs (MDI,Polymer-MDI)


It has been cured in place, however it became stuck to a piece of equipment made out of rubber.  

It is stuck several meters down a line so access is very limited. 


Is there anything that would be strong enough in small quantities to dissolve or even loosen this adhesive?


Any thoughts on a mixture of water 90%, ammonia 8% and detergent 2%? 
Would I need a large quantity of this mixture or how effective would it be?
Or a mixture of the same except using sodium carbonate instead of ammonia?


Any help or suggestions would be greatly appreciated.


Thanks


