Just purchased a set of used Thiel Powerplanes. They use Thiel’s proprietary coax drivers - have a rubber surround that I believe is butyl but could be natural rubber?? From extensive reading it is plasticizer that needs replenished. Armorall and 303 (which are essentially the same thing at different water dilution) merely surface protect against further damage but do little to re-plasticize. This Caig stuff has limonene which I believe acts as a plasticizer. It is also found in GooGone. Anyone know what plasticizer is actually used in butyl rubber?
Treatment for rubber speaker surrounds?
Anyone use any type of treatment like silicone for their speaker surrounds to preserve them from getting hard and drying out. Does any company make a product meant for this purpose? I have heard of people using Armor All but IMO that is not the best choice because it also can cause drying and cracking.