Frequently Asked Questions (FAQs) FAQs for Product: Silicone Seal & Foam Set 432 Full Face Masks 400HC113 400HC114 400HC115 1. Can i use this on a 431 mask? (Posted: 20th Dec, 2007) Question & Answers for Product: Silicone Seal & Foam Set 432 Full Face Masks 400HC113 400HC114 400HC115 Q. Can i use this on a 431 mask? (Posted: 20th Dec, 2007) A. The silicon seal will fit, however the 431 doesn't have any provision for a foam. Back to Top Submit A New Question Can't Find The Answer You're Looking For? Submit Your Question Below: Related Product:  Silicone Seal & Foam Set 432 Full Face Masks 400HC113 400HC114 400HC115 Your Question:  (Please enter One Question Only! You can ask as many questions as you like, but do not combine them into one post!) Your Reply Email Address:  Security Step:  Enter the text to the Left in the space below: [ CLOSE WINDOW ]