LUMISIL® 245 Gel UV is a 2-part transparent silicone gel that is designed for a stencil printing lamination system with curing by UV condition for displays.


  • Low flowability for stencil printability 
  • Low modulus for efficient stress relaxation
  • No oxygen inhibition
  • Excellent optical stability with high transparency
  • Excellent thermal stability by siloxane backbone
  • Low volume shrinkage

Specific features of LUMISIL® 245 GEL UV A/B

  • Addition Curing
  • Flowable
  • Highly transparent
  • No chemical shrinkage
  • Two-component
  • UV curing
  • Optical bonding or DAM for displays
  • Encapsulation of optical & electronic components
  • Production of damping elements

Surface preparation
All surfaces must be clean and free of contaminants
that will inhibit the cure of LUMISIL® 245 Gel UV.
Examples of inhibiting contaminants are sulfur-containing
materials, plasticizers, urethanes, amine-containing materials,
and organometallic compounds – especially organotin compounds.
If a substrate’s ability to inhibit cure is unknown, a small-scale test
should be run to determine compatibility.

LUMISIL® 245 Gel UV A (Part A) : ELASTOSIL® Cat UV (Part B) = 10:1

Curing speed can be adjusted by UV power and
time. Heat can accelerate the curing process.
We recommend running preliminary tests to optimize
conditions for particular applications. Comprehensive
processing instructions are given in below.

  • Recommended Lamp Type: UV-A, Mercury, 365 nm LED
  • For Normal process: Metal halide is recommended
  • For Hybrid process (UV first, then laminate) :
    UV energy should be controlled depending on the open time from UV exposure to lamination

If the applied lamp is 365nm LED lamp, the higher UV irradiance would be better (ex. 2,000 mW/cm2).

Tack-free time can be increased or decreased depending on the applied irradiance of the energy source.


  • 1 KG Bottle PE
  • 9 KG Bottle PE
  • 18 KG Hobbok


LUMISIL® 245 Gel UV A and ELASTOSIL® Cat UV should be stored between 5 °C and 30 °C and below  60%RH in the tightly closed original container.

The 'Best use before end' date (Shelf life) of each batch appears on the product label. 

Storage beyond the date specified on the label does not necessarily mean that the product is no longer usable.

In this case, however, the properties required for the intended use must be checked for quality assurance reasons.

Shelf life
• LUMISIL® 245 Gel UV A : 1year
• ELASTOSIL® Cat UV : 6 month

Sales and support

Wacker Chemical Corporation
3301 Sutton Road
Adrian, MI 49221-9397
United States
+1  888  922-5374 (Phone)

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