Every fire door should have an appropriate "Fire door" sign fitted. Where doors can be used from either side a sign is required on both sides. Doors which open on to a fire escape corridor should be locked shut and signed accordingly.Material Options ExplainedChoose the right material for your application:.Rigid Plastic: Lightweight, gloss white PVC with high impact strength. Suitable for both internal and external safety signs. Easily drilled for wall fixing.Self-Adhesive Vinyl: A high gloss, flexible PVC vinyl with self-adhesive backing. Suitable for applying to most smooth, dry and clean surfaces. Ideally suited for internal signs.Photoluminescent Rigid Plastic: 1.2mm Rigid PVC with photoluminescent (glow in the dark) pigmentation. Afterglow properties exceed PSPA Class C grade, as measured to DIN 67510, provides razor sharp definition even in blackout conditions.Photoluminescent Self Adhesive: Flexible PVC with photoluminescent (glow in the dark) pigmentation. Afterglow properties exceed PSPA Class C grade, as measured to DIN 67510, provides razor sharp definition even in blackout conditions.Rigid Plastic with Self Adhesive Back: Rigid PVC provides a durable finish, whilst a high tack self-adhesive backing removes the need for drilling, screwing or additional adhesive fixings. Also referred to as Quick-Fix signs.