In case you can't read what's been written about polysulfides the chemicals leach the plasticizers from plastics over time and lead to premature failure and brittle plastics!!
Your experiment only proves that you did not read what has been written and that you did not give it enough time to effectivly test the product for what damage is said to occur with certain plastics.
Your experiment displays nothing more than a polysulfide sitting on the surface for a short time.
Again, you can ignore Practical Sailor, Don Casey, BoatLife and manufacturers such as Beckson if you want.
I will not continue to argue with someone who will never admit they have made a judgement error even when faced with solid evidence against them.
The evidence in boating industry, and from the manufacturers themselves should be enough for any sane individual but not good old "red box Burton"..
Use polysulfides (Life Caulk & 3M 101) carefully with plastics as they may not be compatible with some of them and it can lead to leaching of the plasticizers causing premature failure. When in doubt pick up the phone and call a manufacturer. I did this with Beckson and got an ear full about the damaging qualities of polysulfides with their portlights.
In case what Don Casey and Boat Life, the manufacturer of Life Caulk, says still isn't enough here's what Practical Sailor says:
Originally Posted by Practial Sailor
Polysulfides will adhere to metal, glass, fiberglass, wood, or any combination of these. They should not be used for cementing PVC, acrylic (Plexiglas), ABS, or Lexan plastics, because the solvents in polysulfides can leach the plasticizer from these plastics and cause them to harden and crack.
Silicone sealants are usually recommended by the
manufacturers of products made from these plastics. The higher-quality plastic fittings made from Delrin, nylon, glass-reinforced nylon (Marelon), or glass-filled epoxy are not affected by polysulfide sealants.
Just as I've said before you need to send your test photos that are "as good as any magazine" to Boat Life, Don Casey and Practical Sailor and take this apparent "gross judgement error" against polysulfides up with them..