A3 Lockable Outdoor Poster Case in Black Anodised Aluminium with Weather Seal

Every business has a wall space beside the entrance that should be working harder. The opening hours. The daily special. The treatment menu. The safety notice. Right now it is probably taped to the glass, pinned to a corkboard or displayed in a snap frame that anyone can open and the weather will eventually ruin. The SFLA3B replaces all of those compromises with a permanent, lockable, weatherproof A3 display that protects the poster inside and frames the message outside with the premium authority of satin black anodised aluminium. Compact enough to fit beside a shop door, a salon window or a clinic entrance without overwhelming the facade.

A3 format (297mm x 420mm). Overall frame dimensions: 367mm (W) x 490mm (H) x 30mm (D). 45mm satin black anodised aluminium profile. Lockable hinged door with key. Internal rubber weather seal. High-impact acrylic front panel with edge clips. Safety arm holds door open during poster changes. Wall fixings included. No assembly required. Poster not included. Free UK mainland delivery.

Protection, Security and Presentation in One Compact Frame

• Tamper-proof key lock for absolute brand control: Once locked, your poster is safe from opportunists, pranksters and late-night interference. Only the keyholder changes the content. In unsupervised public spaces and overnight high streets, the lock keeps your messaging exactly as you installed it.
• Perimeter weather seal for total climate defence: An internal rubber gasket runs the full perimeter of the hinged door, sealing out driving rain, condensation, road spray and dust. Standard outdoor frames let moisture through the snap edges. This case locks it out entirely.
• High-impact acrylic front panel for street-level protection: The 2mm acrylic panel absorbs knocks from bags, umbrellas and casual contact without cracking or shattering. The clear surface keeps the A3 graphic fully visible and legible from the pavement approach.
• 45mm satin black anodised aluminium profile: The satin black finish provides a sharp, high-contrast border that makes artwork pop against any building material: red brick, render, stone, glass or dark cladding. Not a utilitarian notice board. A permanent design feature that frames your brand on the wall.
• Safety arm and internal clips for hands-free poster loading: Unlock the door and a built-in safety arm holds it open. Both hands free. Slide the A3 poster against the back panel, clip the edges, close and lock. The entire change takes seconds. The frame stays on the wall throughout. No disassembly. No tools beyond the key. One person updates every frame across a multi-site estate in a single round.
• Compact A3 format for tight wall spaces: A3 fits where A2 and A1 cannot: beside narrow doors, on brick pillars, flanking salon windows and in the tight entrance recesses of older buildings.

Sectors Where the A3 Black Lockable Case Earns Its Place

The key lock is the feature that separates this poster case from every outdoor snap frame on the market. Snap frames are fast because anyone can open them: staff, customers, vandals and competitors alike. This frame prioritises curated security. Once locked, the A3 poster inside is exclusively under your control. In unsupervised public spaces, overnight high streets and locations where staff cannot monitor the signage around the clock, the lock ensures the messaging stays exactly as you installed it until you decide to change it. No ripped posters. No graffiti. No competitor flyers stuck over your promotion.

The internal rubber gasket running the full perimeter of the hinged door is what makes this a genuine outdoor poster case rather than an indoor frame bolted to an exterior wall. Standard snap frames rely on corner mitres and friction to keep moisture out, and they fail within weeks as temperature cycling warps the aluminium edges and lets driving rain, condensation and road spray reach the poster. This frame creates a continuous sealed barrier around the entire perimeter. The poster stays flat, dry and presentable through every season the British climate delivers without staff needing to check it after every storm. That operational advantage is the reason councils, schools and NHS trusts specify this case for their outdoor signage.

The 2mm high-impact acrylic front panel replaces the thin covers that other outdoor frames use. Standard covers crack under force and cloud over time with UV exposure. The heavy-duty acrylic absorbs the street-level contact that outdoor signage accumulates: bags, umbrellas, elbows and the occasional deliberate impact. The clear surface keeps the A3 poster legible from the pavement approach.

A3 is the compact outdoor format that fits where larger cases cannot. At 367mm wide by 490mm tall, the frame sits comfortably on a standard brick pillar, beside a narrow shop door, flanking a salon window or in the tight entrance recesses of older buildings. The 45mm satin black profile frames the poster with the premium authority of a gallery display rather than the institutional aluminium strip that makes outdoor notice boards look like council planning applications. The black finish pops against red brick, render, stone, glass and dark cladding, turning the poster case into a permanent design feature of the building exterior rather than something that was bolted on as an afterthought.

What Ships in Your Pack

• 1 x A3 lockable outdoor poster case in satin black with key, safety arm and wall fixings