FPD.DEV Custom Silicone Tuning System

FPD.DEV has decades of hands-on experience selecting, modifying, and tuning optical bonding silicones for real production environments. The old approach of “mixing off ratio” to change hardness, cure speed, or handling behavior is a thing of the past. Today, the better path is to start with the right material family, then tune the formulation around your process, bond-line design, adhesion needs, rework expectations, and production volume.

Whether your process is fully manual, with every step performed by hand, or a highly automated bonding system that requires working life, set time, and cure time measured in low minutes, FPD.DEV can help identify a silicone system that fits. This selector provides a starting point for comparing materials and tuning directions, then FPD.DEV can refine the recommendation through process review, sample builds, and application-specific testing.

FPD.DEV Display Development • Optical Bonding • Materials

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Custom Silicone Tuning System

Start with target material behavior. The tool selects the closest starting formulation based on working life, set time, adhesion, and hardness, then suggests up to two similar clear materials. You can manually change the starting formulation after the match is selected. This tool is under development and may produce incorrect results.

1. Select Closest Starting Material

Choose target behavior first. The closest material becomes the Starting Formulation below. This selector is directional only and will improve as more test data is added.

Target Hardness Soft gel

28 / 100

Soft Shore A Rigid

Target Adhesion Serviceable

50 / 100

Removable Serviceable Permanent

Target Working Life 5 minutes 15 minutes 25 minutes 35 minutes 1 hour 1.5 hours 2 hours 8 hours

Below about 25 minutes usually needs automation or very controlled processing.

Target Set Time 20 minutes 50 minutes 70 minutes 90 minutes 1.75 hours 4 hours 6 hours 15 hours

Set time means carefully movable, not fully cured.

Find Best Starting Formulation Use Balanced Optical Bonding Target

2. Starting Formulation & Tuning Inputs

Starting Formulation DOW / OPA 527 — 1:1 Very Soft Gel DOWSIL™ EG-4131 Dielectric Gel Kit OPA / DOW 527 Mod 1 — Hard / Fast OPA / DOW 527 Mod 2 — Medium / Fast OPA / DOW 527 Mod 3 — Soft / Balanced OPA / DOW 527 Mod 7 — Soft / Slow Momentive RTV6136 — Tested Bonding Material Momentive RTV6136-D1 Momentive RTV6126-D1 Momentive RTV6156 Momentive Invisisil™ SN3001 Optica1 Optical Bonding Silicone

The matcher will set this to the closest starting formulation. You can still change it manually.

OPA Baseline Material Code

Load Code

This OPA- hex code describes the approximate selected material and client preferences. Share it with FPD.DEV as a baseline for material development.

Current code updates automatically below.

Part A Ratio

Normally held at 1.0.

Part B Ratio

527 can run up to 1:3.75 before failure warning.

Ratio Adjustment 1:1.00

1:1.00

More A / harder Default More B / softer

Tunable Hardness / Elasticity Soft Gel

—

Soft gel Shore A Shore D

Tunable Adhesion —

—

Removable Serviceable Nearly permanent

Extended Temperature Range Requirement If checked, recommend full cure under controlled room-temperature conditions near 24°C before qualification or shipment.

Heat Cure Temperature 24°C

24°C

24°C controlled Low-temp assist 70°C max

Bond Line Thickness

Default: 0.50 mm

Unit mm inch

Reset to Material Defaults Print / Save PDF

Tuned Output

Best Match / Starting Material —

Match Score —

OPA Baseline Material Code — Use this OPA- hex code to share approximate material and client preferences with FPD.DEV as a baseline for material development.

Material Family —

Mix Ratio —

Hardness Estimate —

Working Life —

Set Time —

Full Cure Time —

Adhesion / Rework — —

Relative Cost — —

Availability / MOQ — —

Bond Line —

Best Use —

Similar Clear Materials — —

Ratio Status —

Display Stress Risk —

Processing Recommendation —

Cure Guidance —

Development note: This tool may produce incorrect results. More materials are being added. The model will improve as real adhesion, durometer, working-life, set-time, heat-cure, cost, availability, MOQ, and full-cure enhancement data are added to the internal material table.

Item	Starting Value	Tuned Estimate	Notes

Disclaimer: This tool is being developed and may produce incorrect results. It is for preliminary silicone selection and process discussion only. It does not replace material datasheets, supplier specifications, optical inspection, environmental qualification, adhesion testing, durometer testing, heat-cure validation, cost quoting, availability confirmation, MOQ confirmation, or production validation.