Conformal Coatings

A conformal coating is used to protect electronic components from environmental factors. Adhesives used as conformal coatings are dual-curing: at their edges and visible surfaces they are cured with UV light; the shadowed areas – for example underneath components or chips – as well as deeper-lying regions are then post-cured by heat application.

To cover large surfaces with a conformal coating, we recommend low-viscosity adhesives. These adhesives are equally suited for spray coating, spin coating and dip coating.

Selective conformal coating can be realized with high-viscosity dam material: With a highly viscous adhesive, a frame or dam is formed, which is then filled with mobile adhesive. This process is also referred to as frame-and-fill.

UV-curing conformal coatings allow rapid curing. Especially epoxy resin-based adhesives are silicone-free and ensure maximum media resistance.

Fluorescent epoxy adhesive is used as Conformal Coating on a PCB

The table below lists a selection of Panacol adhesives suitable as conformal coating. Further products and custom solutions are available on request.

To download the technical datasheets (TDS) please click on the adhesive name.

Adhesive Viscosity [mPas] Base Curing* Properties
Vitralit® 1671 9,000-14,000 epoxy UV
secondary heat cure
Stable frame compound
high ion purity
electronic grade adhesive
high temperature conductivity
low water absorption
UL94 HB test passed
Vitralit® 2004 F 60-100 epoxy UV
secondary heat cure
fluorescing
flexible
autoclavable
dry surface after curing
low ion content
sprayable
Vitralit® 2007 F 200-500 epoxy UV
secondary heat cure
fluorescing
flexible
autoclavable
excellent chemical resistance
low ion content
Vitralit® 2028 160-300 epoxy UV
secondary heat cure
Dry surface after UV-curing
autoclavable
excellent chemical resistance
scratch resistant coating
Vitralit® 2009 F 100-200 epoxy UV
secondary heat cure
fluorescing
flexible
autoclavable
high chemical resistance
low ion content
Vitralit® 4451 500-800 (LVT, 25 °C, Sp. 3/30 rpm) acrylate UV soft and elastic
dry surface after curing
protective coating
fast curing
transparent
Vitralit® 4451 MV F 2,000-3,000 (LVT, 25 °C, Sp. 4/30 rpm) acrylate UV, VIS soft and elastic
dry surface after curing
protective coating
fast curing
fluorescing blue
Vitralit® UD 8050 8,000-11,000 acrylate UV
VIS
secondary moisture cure
Isocyanacrylate
fast moisture post-curing in shadowed areas
easy to dispense with jet or dispenser e.a.
resistant to moisture
fixing and protecting electronic components
Vitralit® UD 8055 5,000-8,000 (Rheometer, 25°C, 10^-1) acrylate UV
VIS
moisture cure
High Tg
Fast curing
Compatible with flux
Low ion content
Vitralit® UD 8056 3,000-6,000 (Rheometer, 25°C, 10^-1) acrylate UV / VIS High Tg, fast curing
Compatible with flux
Low ion content
Passed UL94 HB test

*UV = 320 - 390 nm