Could I have an encapsulated seroma after pectus excavatum custom silicone implant?

One month ago, I had a custom silicone implant surgery for a Pectus Excavatum. The surgery went well. It was somewhat of a large implant (by pectus excavatum standards) and I'm pleased with the results. I had a drain for 16 days post-surgery which was removed after draining about 25/30cc for 3 consecutive days. Since then, I had further seroma accumulation which was aspired 2 times (with 4 days intervals) of about 175cc and 125cc and I expect to have to go for further aspirations in the coming days. But, I fear that the aesthetic result might be altered by some form of encapsulated seroma (as seroma is accumulating towards the base of the implant, around the bottom of the ribs) ... How long does it take to have seroma encapsulated ? is it more a question of days/weeks... or longer than that ? My surgery is only 4 weeks old, and my seroma has not stayed there for long as it has been drained regularly... so maybe my worries and not justified. I don't mind having the seroma aspired still going forward, I just don't want the end result to be altered and I feel the area around the ribs is somewhat larger/heavier now than just after the surgery, but maybe this is because I'm still in the draining process and time will help. Thanks