PRYZM ™ Rigid Core Flooring. Level floors with a suitable cement-based … Learn how to install the Australian Armstrong Flooring PRYZM product (for Australian market only) *Not for USA market. This sequence must be followed throughout the entire installation. THE WINNING CHOICE. Bathroom installation … 100% silicone caulk must be used around the entire perimeter. MULTI-WIDTH PLANKS. See warranty for details. *Exposed to water PRYZM™ planks will not swell, buckle or lose integrity. Armstrong PRYZM Flooring may be installed in residential full bathrooms following the guidelines outlined in the Bathroom Installation Section I. ... All other trademarks are owned by Armstrong Flooring… ... MUST be used in every other row. Armstrong PRYZM Flooring may be installed in residential full bathrooms following the guidelines outlined in the Bathroom Installation Section I.