Cure wavelength, dose, and matched UV spot system for Permabond UV640.

Permabond UV640's datasheet gives 365–420 nm. Confirm against the manufacturer's current datasheet and validate on your parts. It is covered by SunSpot 2, SkyBeam, SkyWand. Spec match, not a cure guarantee.

What wavelength cures Permabond UV640?

Permabond UV640's datasheet gives 365–420 nm. Confirm against the manufacturer's current datasheet and validate on your parts.

What UV dose cures Permabond UV640?

Permabond UV640's datasheet does not publish a single dose figure; cure it to its 365–420 nm absorption and qualify the exposure with a radiometer at your working distance, then validate on your parts.

Which UV spot system cures Permabond UV640?

All three systems we carry output the 365–420 nm Permabond UV640 needs, so the choice is about your process, not wavelength: the SunSpot 2 for bench and high-dose work, the SkyBeam for an automated line, and the SkyWand for field and rework. This is a spec match, not a cure guarantee, validate on your own parts.

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UV Cure Compatibility

Curing Permabond UV640 With a UV Spot System

Permabond UV640 is a long-wavelength methacrylate-ester UV adhesive. Its manufacturer's datasheet cures it at 365–420 nm. Here is which Uvitron UV spot systems cover that wavelength, how to choose between them, and what to confirm before you run production.

Chemistry

a long-wavelength methacrylate-ester UV adhesive

Cure wavelength

365–420 nm

Published dose

Not stated on the datasheet

Atmosphere

Not stated

Specifications from Permabond UV640 Technical Data Sheet (read Jul 2026). View the Manufacturer Datasheet ↗

Which Systems Cover It

Wavelength Match

This adhesive cures at 365–420 nm. The dots are our LED wavelengths, the green ones land inside its band.

300350400450500

Our LED wavelengths

365 nm ✓385 nm ✓395 nm ✓405 nm ✓

All four of our LED wavelengths land inside this band, so an LED system reaches it. The SunSpot 2 arc covers the whole range as well.

SunSpot 2 COVERS

Broadband Arc

Broadband 275–650 nm output spans this adhesive's 365–420 nm absorption at >18 W/cm² UVA.

SkyBeam COVERS

4-Channel LED

Its 365 nm / 385 nm / 395 nm / 405 nm LED channels fall inside this adhesive's 365–420 nm absorption, with per-channel timers and life logs for a logged, repeatable production cure.

SkyWand COVERS

Handheld LED

Its 365 nm / 405 nm handheld LED covers this adhesive for rework, field service, and parts too large for a bench.

Worth Knowing: Its long-wavelength photoinitiator absorbs to 420 nm, so 405 nm LED heads reach it as well as 365 nm sources.

Which One to Buy

All three systems output the 365–420 nm this adhesive needs, so choose by how you cure, not by wavelength:

Bench

SunSpot 2

Bench work, and the highest intensity for thick or high-dose cures.

Automated Line

SkyBeam

A fixtured or automated line with logged, per-channel cures.

Field & Rework

SkyWand

Rework, field service, and parts too big for a bench.

Get a Quote, We'll Match the System to Your Process →

Read This Before You Rely on It. These are the manufacturer's published specifications, not our own test results. Whether a cure fully succeeds also depends on your film thickness, joint geometry, substrate, and lamp distance, so always validate the cure on your own parts and process, and confirm the numbers against the manufacturer's current datasheet.

Permabond UV640 and other product names are trademarks of their respective owners. UV Spot Shop is an independent equipment supplier and is not affiliated with, authorized by, or endorsed by Permabond.

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