Fastlock 781: A True Drop-In Alternative to Henkel 134-135B — Arrange your free trial today

When a leading luxury label supplier found themselves staring down a 10-week lead time for Henkel 134-135B, it made them wonder, what's the alternative? So they reached out to Alphabond  and as always, we moved fast.

Fortunately, the timing couldn’t have been better. We’ve just launched Fastlock® 781, a hot melt adhesive engineered specifically to tackle the toughest packaging bonds on BOPP, PP, PET, and other notoriously challenging substrates. For this customer, it was exactly what they needed. A trial is already arranged for next week.

Fastlock® 781 isn’t just another adhesive, it’s a genuine drop-in replacement for Henkel 134-135B, offering the same processing experience without the long lead times.

Fastlock® 781 - A Drop-In Alternative That Runs at the Same Settings

For operations dependent on Henkel 134-135B, switching adhesives can feel risky. But Fastlock® 781 has been designed from the ground up to mirror 134-135B’s processing profile, giving manufacturers a smooth and interruption-free transition.

No changes. No requalification. No downtime.

Key Advantages of Fastlock 781

• Identical temperature settings

→ Drop it in and run it immediately — no line alterations or downtime.

• Matching open and set times

→ Production speeds stay exactly where they are, even on high-speed automated equipment.

• Very similar viscosity behaviour

→ Clean, consistent application through hot melt nozzles, slot dies, and precision applicators.

• Optimised for the same substrates as Henkel 134-135B

→ Ideal for film-based food and beverage packaging.

Where Fastlock 781 Excels: Film-to-Film & Carton-Pack Bonding

Henkel 134-135B is widely used where accuracy, clean machining, and high-speed bonding are critical. Fastlock® 781 is built for the exact same environments.

BOPP Film-to-Film Bonding (Sandwich Packs, Flow Wraps)

Fastlock 781 delivers high-tack, clear, stable bonds on BOPP-to-BOPP interfaces, perfect for sandwich packs, snack films, and laminated structures where bond security is everything.

Tetra Pak Applications

Suitable for key adhesive points in aseptic beverage carton forming and sealing. Maintains stability, penetration, and fold strength.

SIG Combibloc Applications

Compatible with the multi-layer, coated substrates used in SIG systems, offering dependable sealing and crease-line bonding.

Multi-Layer Laminated Films

Performs consistently across treated and coated films used in high-barrier food packaging, where precision is essential.

These applications are high-pressure environments where adhesive performance directly impacts product integrity and where Fastlock® 781 matches Henkel 134-135B without any parameter changes.

Keeping Production Running When Supply Chains Don’t

With supply issues still affecting major adhesive producers, Fastlock® 781 provides a stable, UK-available alternative that allows production to continue without interruption.

For manufacturers relying on:

• BOPP film bonding

• Tetra Pak production lines

• SIG Combibloc systems

• High-speed food & beverage packaging

…Fastlock 781 offers like-for-like performance.

Using Henkel 134-135B? It Might Be Time to Arrange Your Own Trial

If supply chain reliability is critical and when isn’t it? — Fastlock® 781 gives you the confidence of a rapid, drop-in solution with proven performance.

Thinking about alternatives to Henkel 134-135B?
Now’s the perfect time to trial Fastlock® 781 for yourself.

Complete the form to download the Fastlock® 781 information sheet today.