I emailed their contact info with this question....."Will this product harm my firearms sights, finish, wood/rubber grips or polymer frame/parts?" & This is the response i received this morning...."Thank you for your inquiry. Strike-Hold will not harm wood finishes,
rubber, polymers and most plastics. I say most because there could be some very soft plastics that may be adversely affected, but "normally" occurring plastics such as those associated with weapons or common tools have been shown to be unaffected. You should use normal precautions to wipe optical lenses dry should any overspray come in contact with them. If you have further questions, please feel free to contact us by phone at the toll-free number below. Mike is our technical expert and can help you with specific application questions." I feel much better about using it on my weapons now!!