Skip to content
Home » Concertina Expandable Barriers

Concertina Expandable Barriers

concertina diamond pattern barriers

The Concertina Expandable Barriers are perfect for providing security and safety for both public and private use. From construction sites, public areas and the leisure industries, for permanent fixtures and temporary solutions such as maintenance and cleaning operations. We have the widest range of expandable barriers in Steel, Plastic and Aluminium. (Prices at the bottom of this page.)

These unique and innovative safety barriers are made from aluminium alloy and have an attractive, retractable design and can be quickly installed and operated.

concertina aluminium alloy barrier
A lightweight and strong design, complemented by safety locks on the wheels and mechanical locks, reducing chances of movement when they are positioned as stationary.

concertina barrier safety wheel locks
All safety barriers are fully tested, to maximize quality and safety which is a top priority. The Concertina Diamond Barriers consist of many safety features; produced in high visibility yellow with high visibility reflectors for safety at night.

Mechanical bracing locks the safety barriers when they are extended.

concertina barrier braces

For a very wide range of applications and areas, this easy to extend and install a safety barrier system offers many advantages over a fixed safety barrier system.

extendable steel barrier system

Safety Barrier Specifications

  • 1.3 m height x 2.1 max extendable width
  • 1.8 m height x 2.1 max extendable width
  • 1.8 m height x 4 m max extendable width
  • Tough and Durable
  • Produced in high visibility yellow
  • Safety locks/brakes on the wheels
  • Hi-visibility reflectors for safety at night.
  • Indoor and Outdoor Barriers
  • All barriers fully tested
  • Easy to install

Instant Gate Red and White

instantgate A

Our expanding barrier designed to quickly and easily control pedestrian and vehicle traffic, even in large volumes!

  • Weight: 28 kg
  • Dimensions: 440 x 550 x 1380 mm. Extends from 440 to 2190 mm long
  • Two heights 1380 (4 foot) and 1884 (6 foot 2 Inches) mm
  • Quick to situate in position and move around, but also easy to lock in place
  • Brake to secure one end in place
  • Lightweight, yet strong and rigid
  • Wheels allow for simple portability
  • Simple to use catch, to lock in position and attach multiple barriers together for wider openings
  • Designed for high visibility

instantgate closed

instantgate open

Available in two models

Model Closed Dimensions mm 
 IG4 440 x540 x 1380 High
 IG6 450 x 542 x 1884 High


Instant Gate, a new quick-to-deploy crowd barrier that’s robust and easy to extend to any length. Ideal for crowd control or pedestrian/logistics management in a wide range of situations. Use indoors or outside and extend to any length by adding additional units. The 4ft (1.22 m) high Instant Gate deploys in seconds to cordon off restricted areas. Easy to move and expand single-handedly. Robust braked wheels allow for easy movement and placement. Unique latching system secures the barrier in a closed position when not in use, and can be used to extend to any length using additional modules. Highly visible red and white markings are powder-coated and weatherproof.
Made from lightweight, ultra-strong aluminium. Can be fitted with standard scaffold clamps to fix to scaffolding or turn corners.

Trellis Barriers

trellis barriers red and white

Trellis Barriers are strong expanding barriers that can be quickly and easily deployed to highlight no access areas.

Strong, stable all steel construction.
Quick and easy deployment.
Reflective Red warning strips.
Chain hooks incorporated.
Two versions Light and Heavy Duty


Forecourts, closing off lifts, access ways and exits and entrances, hazardous areas etc.


FLEXI-LIGHT Barrier – Light duty model

  • Height: 1,000 mm
  • Trellis bars: 25 mm x 4 mm
  • Extended width: 3.6 metres
  • Foot depth: 500 mm
  • Finish: Red/white dip painted Red reflective strips
  • Weight: 12 kg

FLEXI-BARRIER – Heavy-duty model

  • Height: 1,000 mm
  • Trellis bars: 40 mm x 5 mm
  • Extended width: 4.0 metres
  • Foot depth: 500 mm
  • Finish: Red/white dip painted Red reflective strips
  • Weight: 19 kg

trellis barriers red and white closed

Plastic Concertina Barrier

plastic expanding barrier

  • Plastic concertina barrier ideal for fencing off hazardous areas
  • Distinctive red and white with reflective safety panels
  • Manufactured from 100% recycled plastic
  • Expands to a maximum length of 2100 mm
  • Folds to 155(W) mm
  • End columns are 1065 mm high
  • The barrier is 960 mm high
  • Barrier weighs only 7kgs
  • Water fillable for stability


Model SK99016
Width (mm)2100
Height (mm)1065
Weight (kg)7
FeaturesCloses to 155 mm wide
Lead Time2 working days

Small Expanding Safety Barrier

small expandable barrier

  • Expanding the safety barrier with tough steel construction
  • 910 mm high, expanding to 2700 mm
  • When closed the width of the unit is 240 mm
  • Product weight: 11 kg
  • Male and female attachments for multiple barriers
  • The quality epoxy paint finish
  • Yellow and black
  • Assembly for feet only (spanner required)


Model SK99015
Width (mm)2700
Height (mm)910
Weight (kg)11
FeaturesCloses to 240 mm wide
Lead Time2 working days

Large Expandable Steel Barrier 

large expanding barrier yellow

  • Expandable barrier with tough steel construction
  • Posts are 1700 mm high, expanding to 4200 mm, the barrier is 1530 mm high
  • Width of the unit whilst closed is 460 mm
  • Product weight: 23 kg
  • Ideal for car parks and warehouses
  • Includes braked wheels
  • The quality yellow epoxy paint finish
  • Assembly for feet only (spanner required)
Model SK99014
Width (mm)4200
Height (mm)1700
Weight (kg)23
Lead Time2 working days

 Steel Expanding Concertina Barrier

steel expanding barrier red and white

  • Expanding barrier with tough steel construction
  • Opens up to 2250 mm x 1230 mm high and collapses to 240 mm when not in use
  • Epoxy paint finish
  • Available in Red / White
  • Dimensions (mm) 1230(High) x 240-2250(Wide)
  • Assembled in the UK
  • Product weight: 10.5 kg


Width (mm)2250
Height (mm)1230
Weight (kg)10
FeaturesCloses to 240 mm wide
Lead Time2 working days

For the latest prices and to Order visit our shop here and for current lead times please contact Merlin Industrial Products Ltd