Delta Seal Plus™ The RP124 is a co-extruded rigid and flexible copolymer acoustic smoke seal. This multi-finned self adhesive seal is located in the protected corners of rebated timber or steel door frames. RP124 is suitable for new or retrofit applications. Location Around rebated frames of single or double broad butt hinged doors. Min/Max Gap 3mm to 5.5mm. Seal Sizes Available in door set sizes. Standard Finish Black. Fixing Method Self adhesive backing on both rigid fixing legs. Note: Contact surface must be clean, smooth and if painted, well cured. Seal Material Co-extruded Rigid and Flexible flame retardant PVC Used in Conjunction Raven door bottom seals, threshold plates and astragal seals. Approvals Acoustic AUS/NZ: Conforms to BCA Sect. F5. 5. UK/EU: Conforms to Approved Document E. Fire & Smoke AUS/NZ: Conforms to BCA Spec. C3.4.Tested to AS 1530.4, AS/NZS1905.1 & AS/NZS 1530.7. UK/EU: Conforms to Approved Document B. (Tests above are similar to BS EN 1634.1, BS 476 Part 20 & 22).