1mm Universal 3 Lever Sashlock Intumescent to suit ZSC – Graphite

🔥 1mm 3 Lever Sashlock Intumescent Pad – Reliable Fire Door Safety Protection

🧱 Overview

The 1mm 3 Lever Sashlock Intumescent Pad for ZSC Locks is a fire-safety insert engineered to protect door assemblies where sashlocks are fitted.
It expands during heat exposure, forming an airtight barrier that delays fire, smoke, and gas transfer through lock cut-outs.
Simple to install yet powerful in performance, this pad is a must-have for compliant fire-door construction.

Intumescent pads work by swelling when heated, closing off weak points in a door.
The result is a fully sealed core that holds back flames and smoke for the rated time, keeping occupants safer and giving emergency services critical extra minutes.

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⚙️ Key Specifications of 1mm 3 Lever Sashlock Intumescent Pad

Feature	Description
Type	1mm 3 Lever Sashlock Intumescent Pad
Thickness	1 mm
Compatibility	ZSC 3 Lever Sashlocks (2.5 in & 3 in)
Fire Rating Support	FD30 / FD60
Material	Graphite-based intumescent sheet
Colour	Black
Expansion Rate	Up to 10× its original thickness
Installation	No adhesive required – tool-free fit
Use	Fire doors in residential and commercial projects

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🔍 How It Works

When temperature reaches roughly 180 °C, the 1mm 3 Lever Sashlock Intumescent Pad for  for ZSC Locks reacts instantly.
The graphite content expands into a dense foam, filling cavities around the lock body.
This foam blocks the path of hot gases and flames, keeping the internal door core intact.

By sealing one of the most vulnerable parts of a fire door, the pad helps maintain full FD30 or FD60 integrity ratings.
Even thin doors benefit from its expansion power, as 1 mm of material can multiply up to 10 times its size when activated.

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🧩 Installation Guide for 1mm 3 Lever Sashlock Intumescent Pad

Fitting the pad takes only a few minutes:

1. 🔧 Remove the sashlock from the door.
2. 🧼 Clean the mortice cavity and remove dust or debris.
3. 📏 Position the pad around or behind the lock body.
4. 🔩 Re-insert the lock and secure in place.
5. ✅ Test operation to ensure the latch and key function smoothly.

Tip: The 1mm 3 Lever Sashlock Intumescent Pad for is flexible enough to adjust during fitting but firm enough to stay in place without glue.

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💡 Key Advantages

• 🧯 Fire Safety Performance: Expands to seal gaps and prevent fire spread.
• 🛡️ Invisible Protection: Hidden behind the lock; doesn’t affect aesthetics.
• ⚙️ Universal Fit: Compatible with both 2.5″ and 3″ ZSC locks.
• 💪 Durable and Maintenance-Free: No need for future replacement.
• 📦 Simple Installation: Fits in seconds, with no special tools.
• ♻️ Eco-Friendly Material: Non-toxic and asbestos-free.
• 💰 Cost-Effective Safety: Low cost, high protective value.

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🧱 Typical Applications

The 1mm 3 Lever Sashlock Intumescent Pad umescent Pad for ZSC Locks is ideal for:
🏢 Commercial offices
🏠 Residential homes and apartments
🏫 Schools and universities
🏥 Hospitals and care facilities
🏗️ Industrial units and public buildings

Whether used in new fire-door installations or maintenance upgrades, it ensures each door meets its certified performance rating.

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🔥 The Science of Intumescence

Graphite-based materials expand dramatically when heated.
During a fire, the pad’s carbon layers release gases that form a stable foam char.
This char blocks heat transfer, prevents oxygen entry, and seals gaps that would otherwise allow fire to pass.

The 1 mm pad for ZSC locks is tuned to activate quickly yet expand evenly, so it fills the cavity without damaging the door face or affecting lock movement.
Its reaction time ensures protection before the door’s surface reaches failure temperature.

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🧾 Compliance and Testing

Each pad type is tested to meet common UK and international fire-door standards.
Typical performance verification includes:
✔️ Expansion ratio and activation temperature
✔️ Dimensional stability before and after heat exposure
✔️ Compatibility with standard lock cases
✔️ Resistance to humidity and aging

This testing ensures consistent performance through the entire life of the fire door.

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🧰 Integration with Other Hardware

For maximum protection, combine the 1mm 3 Lever Sashlock Intumescent Pad for ZSC Locks with complementary components:

Component	Function
Fire-rated hinges	Support door structure during fire exposure
Door closers	Ensure automatic closing for containment
Smoke and acoustic seals	Block smoke & noise
Fire-rated door frames	Maintain full assembly integrity

A complete system ensures every part of the door contributes to reliable fire resistance.

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🧠 Maintenance & Care for 1mm 3 Lever Sashlock Intumescent Pad

This pad needs no ongoing maintenance.
During periodic door inspections, confirm that it remains in place and undamaged when locks are removed.
It is unaffected by moisture, air pressure, or daily use, giving decades of protection without attention.

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🪶 Environmental and Health Benefits

The 1 mm pad contains no asbestos, halogens, or toxic fillers.
It is safe to handle, recyclable where facilities exist, and does not emit harmful fumes during activation.
Because it lasts for the life of the door, it reduces waste and overall maintenance costs.

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🧩 Choosing the Right Pad Thickness

While this model is 1 mm thick, pads are available in other sizes for different lock cases.
Thinner pads suit light doors or narrow mortices, while thicker versions may be used for heavy commercial fire doors.
Always verify with your door and lock specifications before installation to maintain certification validity.

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💬 Professional Feedback

“This small addition passed our fire tests without issue — simple, fast to fit, and effective in sealing lock voids.”
— Installer Comment

“A lightweight solution that gives confidence during inspections. It’s often overlooked but makes a big difference.”
— Site Manager Review

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🧾 Summary of Key Points

• Thickness – 1 mm graphite pad
• Lock Type – 3 Lever ZSC pattern sashlock
• Sizes – 2.5″ and 3″
• Fire Rating – FD30 / FD60
• Activation Temperature – ≈180 °C
• Expansion Rate – Up to 10×
• Installation – Tool-free, no adhesive
• Maintenance – None required

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🧩 Why It Matters

Fire-door certification depends on every part of the assembly performing correctly.
Without an intumescent pad, the lock cavity becomes a weak spot where heat and smoke can escape.
Adding the 1mm 3 Lever Sashlock Intumescent Pad for ZSC Locks closes this risk, ensuring the door performs as tested.

Its reliability and simplicity make it one of the easiest upgrades for safety compliance.
Architects, builders, and maintenance engineers all rely on it as part of standard fire-door practice.

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✅ Conclusion

The 1mm 3 Lever Sashlock Intumescent Pad for ZSC Locks is a compact but powerful safety accessory that ensures your fire doors maintain their rated protection.
By expanding rapidly when exposed to heat, it seals gaps around the lock body, preventing the spread of fire and smoke.
Durable, invisible once fitted, and entirely maintenance-free, it’s the ideal choice for both new installations and retrofit upgrades.

A simple step that delivers serious safety — protecting lives, buildings, and compliance for years to come.