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Fire Retardant Polyurea-Coating from Polyvers PolyVers PV 340 is a 100% solids elastomeric coating developed for applications requiring ASTM E-162 fire rating. PV 340 is a volatile free, odorless system applied at a 1:1 mix ratio using plural component spray equipment. While other systems content abrasive flame retarders which wear out a spray gun in a very short time, PV 340 can be used without any such problems. Permission for the... Read more in the printed issue. This link takes you to the subscription page. Or log in as a Superabo.