Optically Clear Performance Products

Gelest has a successful history of developing optical, reprographic, and gel formulations. Gelest now offers new pre-formulated optical encapsulants and optical hard coating materials.

A thin film optical coating deposition on an optic imparts different behaviors. Silicone gels and elastomers as cladding/sealing materials have high optical transmission. Optical coating materials containing silicon can be modified to have refractive indices matching those of the substrate.

Optical Grade Silicone Encapsulants

See specific product information in the Microfluidics technical guide.

Optical Grade Silicone Encapsulants

Mix Ratio 1:1, 2-Part Platinum Addition

Product Code	Refractive Index	Tensile Strength (MPa)	Elongation (%)	Durometer (A)	Viscosity Mixed (cSt)	Specific Gravity	Cure Time/Temp	Potlife (hr)
Gelest OE39 (PP2-OE39)	1.39	0.10	212	13	4,163	1.13	2h/80 °C	2
Gelest OE41 (PP2-OE41)	1.41	> 2	140-200	15-30	1,750-2,500	--	4h/80 °C	18
Gelest OE42 (PP2-OE42)	1.42	> 1.5	90-150	10-25	1,500-2,000	--	4h/80 °C	18
Gelest OE43 (PP2-OE43)	1.43	> 1.5	75-100	5-15	800-1,500	--	4h/80 °C	18
Gelest OE46 (PP2-OE46)	1.46	0.25	30-50	10-20	1,500-2,500	1.05	4h/80 °C	18
Gelest OE46.1 (PP2-OE46.1)	1.46	0.55	65-75	30-45	15,000	1.19	4h/80 °C	18
Gelest OE46.2 (PP2-OE46.2)	1.46	1-1.5	200-250	45-50	30,000	1.22	4h/80 °C	18
Gelest OE50 (PP2-OE50)	1.49	0.13	160	11	3,819	1.07	4h/55 °C	>4


Gelest OE39 (PP2-OE39)
Gelest OE41 (PP2-OE41)
Gelest OE42 (PP2-OE42)
Gelest OE43 (PP2-OE43)
Gelest OE46 (PP2-OE46)
Gelest OE46.1 (PP2-OE46.1)
Gelest OE46.2 (PP2-OE46.2)
Gelest OE50 (PP2-OE50)

Optical Grade Silicone Hard Resin Coatings

See specific product information in the Optical Materials technical guide.

Optical Grade Silicone Hard Resin Coatings

1-Part

Product Code	Refractive Index	Hardness	Viscosity (cSt)	Flash Point (°C)	Specific Gravity	Solids (wt %)	Cure Time/Temp
Optisil® 155A1 (PP1-OS155A1)	1.55	--	3-5	35	0.95	10	1h/25 °C
Optisil® 155B2 (PP1-OS155B2)	1.54-1.56	120 R	3-5	35	0.95	20	1h/25 °C
Optisil® 156A1 (PP1-OS156A1)	1.56	--	3-5	35	0.92	10	1h/25 °C
Optisil® 157A1 (PP1-OS157A1)	1.57	--	3-5	35	0.92	10	1h/25 °C
Optisil® 157B2 (PP1-OS157B2)	1.56-1.58	110 R	3-5	35	0.92	20	1h/25 °C
Optisil® 158A1 (PP1-OS158A1)	1.58	--	3-5	35	0.92	10	1h/25 °C
Optisil® 159A1 (PP1-OS159A1)	1.59	--	3-5	35	0.92	10	1h/25 °C
Optisil® 164A1 (PP1-OS164A1)	1.64	--	2-3	35	0.95	10	1h/25 °C


Optisil® 155A1 (PP1-OS155A1)
Optisil® 155B2 (PP1-OS155B2)
Optisil® 156A1 (PP1-OS156A1)
Optisil® 157A1 (PP1-OS157A1)
Optisil® 157B2 (PP1-OS157B2)
Optisil® 158A1 (PP1-OS158A1)
Optisil® 159A1 (PP1-OS159A1)
Optisil® 164A1 (PP1-OS164A1)