Cat Mate Tunnel Extension Wall Liner – 50mm Extension Section

The Cat Mate Tunnel Extension Wall Liner is designed to extend compatible Cat Mate cat flaps through thick doors, cavity walls and brick walls. Each tunnel section adds 50mm (2") of additional depth and can be stacked together to create a custom-length tunnel for almost any wall thickness.

Manufactured from durable, moisture-resistant white plastic, these genuine Cat Mate tunnel liners provide a neat and professional finish for wall installations. They are easy to fit, can be trimmed to size if required, and may also be painted to match your interior or exterior décor.

Whether you are installing a cat flap through a single-skin wall, cavity wall or deep door panel, multiple tunnel sections can be joined together to achieve the required depth while maintaining a tidy and secure installation.

Key Features

• Adds 50mm Tunnel Depth – Each extension section increases the tunnel length by 50mm (2").
• Stackable Design – Connect multiple liners together for thicker walls.
• Moisture-Resistant Construction – Helps create a durable and weather-resistant wall tunnel.
• Paintable Finish – White plastic can be painted to blend with your décor.
• Easy to Cut – Trim sections to achieve the perfect fit for non-standard wall thicknesses.
• Professional Installation – Creates a neat and secure tunnel through walls and deep door panels.
• Genuine Cat Mate Accessory – Designed specifically for compatible Cat Mate cat flaps.

Compatible Cat Flaps

• Cat Mate Elite Microchip Cat Flap with Timer Control (355)
• Cat Mate Elite I.D. Disc Cat Flap with Timer Control (305)
• Cat Mate Microchip-Activated Cat Flap with Manual Lock (360)
• Cat Mate Timer Control Cat Flap (359)
• Cat Mate Rotary 4-Way Locking Cat Flap (358)

Important: Models 358, 359 and 360 also require the Cat Mate Adapter Kit for Walls and Glass Panels (361). This adapter provides the connection between the cat flap and tunnel system and includes finishing frames for both sides of the wall.

Specifications

• Length: 50mm (2") per tunnel section
• Material: Durable moisture-resistant plastic
• Colour: White
• Paintable: Yes
• Quantity: 1 × Tunnel Extension Wall Liner

How Many Tunnel Extensions Do You Need?

Each tunnel liner adds 50mm to the overall tunnel depth. Simply divide your wall thickness by 50mm to determine the number of sections required.

• 100mm wall = 2 tunnel liners
• 150mm wall = 3 tunnel liners
• 200mm wall = 4 tunnel liners
• 250mm wall = 5 tunnel liners
• 300mm wall = 6 tunnel liners

For non-standard wall thicknesses, the liners can easily be cut to size. For example, a 220mm wall would require 5 liners, with one trimmed by 30mm.

Installation Tips

• Stack the required number of tunnel sections to match the wall thickness.
• Apply a thin bead of sealant between each section to improve moisture resistance.
• Wrap duct tape around the outside joints to keep the tunnel secure during installation.
• Paint the finished tunnel if required to match surrounding décor.

Frequently Asked Questions

Can the tunnel liner be painted?

Yes. The white plastic surface can be painted to match your interior or exterior décor, helping to create a seamless professional finish.

Can I cut the liner to size?

Yes. The tunnel sections can be trimmed with standard tools to suit unusual wall thicknesses and achieve a precise fit.

Is this suitable for cavity walls?

Yes. These tunnel extensions are ideal for cavity walls, brick walls, timber walls and other installations where additional tunnel depth is required.

Do I need an adapter kit?

If you are installing Cat Mate models 358, 359 or 360 through a wall, you will also require the Cat Mate Adapter Kit for Walls and Glass Panels (361).

Please note: This listing is for one 50mm Cat Mate Tunnel Extension Wall Liner only. Cat flaps, adapter kits and additional tunnel sections are sold separately.