STALWART Steel Security Doors

Built and certified for secure protection, Steel Security Doors are designed to protect staff, customers and assets from manual attack, bullet and blast attack.

Steel Security Doors are custom-fit to a wide variety of specifications, including size, resistance, colour, finish and locking options. Doors can be designed to provide protection from manual attack to the toughest blast resistant certifications.

A large number of different bespoke constructions and door configurations are available, with varying options for resistance levels. The resistance levels available include manual attack resistance, bullet resistance, blast resistance and fire resistance to a wide range of levels and times.

Download Stalwart Door Datasheet

  • Specifications

  • Applications

Technical Information

Steel Security Doors are constructed from 16 SWG (Standard Wire Gauge), 1.6mm thick ‘zintec’ steel sheet material and formed with Dutch-folded seams. The doors are assembled with a bonded honeycomb core prior to welding. Hinge and lockmount reinforcements are incorporated prior to spray priming / finishing. The frame can be formed of ‘zintec’ steel that is supplied as a bolt together set or alternatively it can be formed of a rectangular welded hollow section. All hinge cut-outs and lock moctices are reinforced prior to spray priming / finishing. The additional security protection offered by Stalwart Level 3 and 4 includes major reinforcement of the working points and frame sections combined with hinge bolt locations. The Level 4 door utilises a heavy duty continuous hinge.

The door leaf consists of a heavy duty tubular steel frame surrounding integral structural members and clad steel armour. A flange around the outside edges of the door prevents attacks from tools inserted between the door and frame. The door is hung in the frame by a full length continuous hinge and features a unique door frame device for maximum security.

Security Doors designed to protect against attack, such as Bullet Resistant Doors and Blast Resistant Doors are configured to open outwards against the line of attack. The frame is constructed from heavy duty tubular steel section with integral continuous door stop and threshold, doors are made to order and so a wide range of sizes and options can be accommodated.

The frame is constructed from heavy duty tubular steel section with integral continuous door stop and threshold, doors are made to order and so a wide range of sizes and options can be accommodated.


A range of different levels of security locking options are available, from a basic mortise lock to a full safe lock. All certified locks are designed to meet G1 or G2 to BS EN 5051 and FB3, FB4 to EN 1522 ballistic resistance. The locks available include:

  • Mortise Locks
  • TLP3 TESA 3
  • Point Lock
  • TLB3 Tesa Multi-Point
  • Panic Bars
  • Surelock McGill SL313
  • Assa Mico

Colours and Finishes

RAL Paints and veneers are available and can be applied to match corporate branding and building aesthetic. A variety of veneers are available to finish Steel Security doors.


Steel Security Doors are versatile enough to be manufactured in many sizes.

Max Heights: 1800 – 2400mm depending on specification

Max Width: 700mm – 1200mm depending on specification

Panic Hardware

Our selection of Panic Escape hardware is also available, offering protection for Emergency Application EN 179 and Panic Application EN 1125, covering both private and public environments.


All weights based on a 2.1m high x 1.0m wide Door Sample:

  • FB3-F180-EXV25: 160kg
  • G2-F240: 180kg
  • FB4-F240-EXV25: 230kg
  • FB4-EXV28: 280kg
  • FB6: 300kg

Resistance Level

A wide range of resistance specifications are available, including:

  • Manual attack/intruder resistance to  SR2, SR3, SR4, SR5 depending on specification
  • Bullet Resistance to FB3, FB4 and FB6.
  • Blast Resistance to 100kgs at 25 metres (in combination with FB3 and FB4) and 500kgs and 28 metres (in combination with FB4). There are also XR2 and XR3 specifications available for certain constructions. In addition, ISO 16933 EVX25 resistance can be used.

LPCB Rated Options


Strong and stylish entry and exit doors designed for ease-of-access. INNA-DOR’s are available bespoke and made-to-order and set the standard for steel doors with industry-leading specifications, as well as an anti-corrosion guarantee (subject to site location). The doors are available in a polyester powder coating or a traditional timber finish and the door blade can be implemented through several options. Doors are also available in stainless steel.


Provide better accessibility with OUTA-DOR. Featuring industry-leading construction, OUTA-DOR’s are strong, versatile and durable doors designed to provide robust outdoor protection. OUTA-DOR’s can be customised to your exact appearance and technical specification.


Keep your premises secure with TUFF-DOR, designed to offer an enhanced level of security over traditional Internal and External Steel Doors. Certified to the LPS 1175 loss prevention standard to provide increased security against attempted entry from experienced attackers.


Keep your business safe in the event of a significant threat with SECUR-DOR, designed to offer defence against experienced aggressors and assailants. We’re able to offer protection to a variety of levels, providing resistance against different timescales and attack intensity. The SD4 Model can provide Blast Resistance.

Door Options

  • FB3-F180-EXV25
  • G2-F240
  • FB4-F240-EXV25
  • FB4-EXV28
  • FB6


Solutions are available for banking environments, such as high street banks, corporate head offices and building societies. Our solutions are especially ideal for banking organisations which may need to secure high-value cash and assets from bullet resistant attacks, in addition to providing robust security for both the staff and buildings protected by the organisation.


Solutions are available for government buildings, which often require a high-level of protection and policing. With a central location required, government buildings are frequent targets for criminal and terror attacks. Our solutions are able to provide protection for government buildings bespoke to individual needs and requirements.

Research and Data Centres

Solutions are available for data centres, research centres, and areas which require a high-level of gated access, monitoring and restriction. Our solutions are used to provide bespoke protection to the requirements of the organisation.

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