I just used some cheap translucent and a pin head to apply, then let it cure for 48hrs and there hasn't being an issue. You don't go nuts with it, you only want enough to fill the little wells a bit to secure the filter. The tube i got cost less then $10 and have never had an issue with off gassing, personally if it let cure fully and in such small amounts i don't see how it could effect such a large area unless heated above 60cel. I think most people tend to put it in write ups just to cover all bases, lol now if was something like super glue that would be a different story. If you arn't in a rush get the right stuff for the job though, the hardest part is dust between the sensor and filter on reassembly.
Better solution if you have it at your work and don't want to use a pin head then goto a chemist and ask for a syringe and or needle to go with it to suit your need. They have different sized needles so grab one which will suit your need and not be to hard to push out due to the viscosity of the silicon. Remove the plunger and load that way, its also what everyone does TIM and greases