Transparent / Clear Silicone Gaskets
Manufacturer & Custom Solutions
Transparent / Clear Silicone Gaskets
Clear silicone gaskets let light through and make visual inspection easy. They are popular in medical devices, LED lighting and display enclosures. Platinum-cured VMQ gives the best clarity and lowest extractables.
FDA 21 CFR 177.2600
Rubber Articles Intended for Repeated Use
LFGB 30&31
EU Food Contact Materials
USP Class VI / ISO 10993
Biocompatibility of Medical Devices
RoHS / REACH
Environmental Compliance
UL 94
Flammability of Plastic Materials
Built to Your Exact Spec
Custom Silicone Gaskets Options
| Image | Product | Type | Short Info | Action |
|---|---|---|---|---|
 | DIN 32676 Silicone Gasket | Standard & Size | DIN 32676 tri-clamp silicone gaskets, FDA food grade, full size range in stock at ZSR factory. | View Details |
 | AS568 Standard Silicone Gaskets | Standard & Size | AS568 standard-size silicone gaskets for groove-based sealing applications. | View Details |
 | DIN 3869 Silicone Sealing Ring | Standard & Size | DIN 3869 profile sealing rings in silicone for hydraulic ports, working from -60°C to +200°C. | View Details |
 | EN 1514-1 Silicone Gasket | Standard & Size | EN 1514-1 silicone flat gaskets for PN flanges, IBC and FF types, standard and custom sizes. | View Details |
 | Custom Die Cut Silicone Gaskets | Standard & Size | Flat silicone gaskets cut to any shape from sheet stock. Precision cutting for exact fits. | View Details |
 | ISO 7483 Silicone Gasket | Standard & Size | Silicone gaskets to ISO 7483 for ISO 7005 flanges, made for international projects and tenders. | View Details |
 | Custom Molded Silicone Gaskets | Standard & Size | Three-dimensional silicone gaskets made by compression or injection molding. For complex sealing shapes. | View Details |
 | ISO 1127 Silicone Gasket | Standard & Size | Sanitary silicone gaskets matched to ISO 1127 stainless steel tube sizes for food and pharma lines. | View Details |
 | Standard Flange Silicone Gaskets | Standard & Size | Silicone gaskets cut to fit pipe flanges. Matches ANSI, DIN and JIS bolt patterns. | View Details |
 | B16.21 Silicone Gasket | Standard & Size | ZSR makes silicone gaskets to ASME B16.21, ring type and full face type, for Class 150 to 2500 pipe flanges. | View Details |
 | ISO 2852 Silicone Gasket | Standard & Size | ISO 2852 silicone clamp gaskets for food industry couplings, FDA grade, factory direct from ZSR. | View Details |
 | Tri-Clamp / Sanitary Silicone Gaskets | Standard & Size | Hygienic silicone gaskets for food and pharmaceutical pipe connections. CIP and SIP compatible. | View Details |
 | B16.5 Silicone Gasket | Standard & Size | Silicone gaskets from ZSR sized to fit ASME B16.5 flanges, NPS 1/2 to 24 inch, Class 150 to 2500. | View Details |
 | Metric Size Silicone Gaskets | Standard & Size | Metric dimension silicone gaskets for international equipment standards. | View Details |
 | DIN 7603 Silicone Sealing Ring | Standard & Size | Flat silicone sealing rings made to DIN 7603 for screw plugs, banjo bolts and threaded fittings. | View Details |
 | DIN 2690 Silicone Gasket | Standard & Size | Silicone flat gaskets to DIN 2690 / EN 1514-1 dimensions for PN6 to PN40 flanges, food grade available. | View Details |
 | DIN 2691 Silicone Gasket | Standard & Size | Silicone gaskets made to DIN 2691 for tongue and groove flanges PN10 to PN160, ideal for plant repair. | View Details |
 | DIN 11851 Silicone Gasket | Standard & Size | Food grade silicone gaskets for DIN 11851 sanitary unions, DN10 to DN150, FDA material. | View Details |
 | FDA Food Grade Silicone Gasket | Grade | Food-safe silicone gaskets for processing equipment. FDA-compliant and taste-neutral. | View Details |
 | Medical Grade Silicone Gasket | Grade | Biocompatible silicone gaskets for medical devices. Sterilizable with full documentation. | View Details |
 | Industrial Grade Silicone Gasket | Grade | General-purpose silicone gaskets for industrial sealing. Reliable, durable and cost-effective. | View Details |
 | High Temperature / Heat Resistant Silicone Gaskets | Special Function | Heat-resistant silicone gaskets rated for continuous use above 200°C. For ovens and furnaces. | View Details |
 | Flame Retardant Silicone Gaskets | Special Function | Self-extinguishing silicone gaskets meeting UL 94 V-0. For fire-safety applications. | View Details |
 | Solid Silicone Rubber Gaskets | Materials | Solid silicone rubber gaskets with excellent compression set resistance and long service life. | View Details |
 | Fluorosilicone (FVMQ) Gaskets | Materials | Fuel and solvent-resistant silicone gaskets for chemical processing and automotive applications. | View Details |
 | Transparent / Clear Silicone Gaskets | Color | Clear silicone gaskets for visible sealing and light-transmitting applications. | View Details |
 | Black / White Silicone Gaskets | Color | Standard black and white silicone gaskets. Fastest delivery from stock. | View Details |
Transparency Grades
"Clear silicone" is not one single thing. We offer three transparency levels, and each one fits a different job:
Grade | Light Transmission | What You See Through It | How It Is Made | Best Uses |
|---|---|---|---|---|
Translucent | about 40 – 75% | Light passes through, but shapes are blurred and soft | Peroxide or platinum cured | Light diffusion, privacy covers, decorative seals, general gaskets where full clarity is not needed |
High Transparent | about 90% (2 mm) | Shapes, fluid flow, and alignment are clearly visible | Platinum cured, high-purity compound | Sight glasses, inspection windows, medical and food equipment gaskets |
Optical Grade | 91 – 95%, haze under 2% | Almost glass-clear — the sharpest image silicone can give | Platinum cured LSR, precision molded | LED lenses, optical windows, sensor covers, light guides |
Two things worth knowing before you choose:
Our advice
Do not pay for optical grade when you only need to see "is fluid moving." Translucent or high transparent will do that job for much less money. Save optical grade for lenses, displays, and sensor windows where image quality is the point.
Clear vs Colored Silicone
Clear silicone is not just silicone without color — making it well demands a different process from start to finish:
Factor | Clear Silicone | Colored Silicone |
|---|---|---|
Curing System | Platinum cured — the only way to get true clarity (peroxide-cured material stays cloudy) | Usually peroxide cured; platinum available |
Production Environment | Strict contamination control — every tiny speck or fiber is visible, so mixing and molding areas must be extra clean | Standard clean production — the pigment hides minor specks |
Appearance Control | Any defect shows instantly: bubbles, dust, flow marks | Forgiving — color masks small visual defects |
Hardness Range | Typically 30 – 80 Shore A (clarity comes from high-purity formulas, so extreme hardness options are limited) | Full range, 10 – 90 Shore A |
UV & Yellowing Stability | Platinum-cured clear grades are non-yellowing and UV-stable — they stay clear for years | Yellowing is invisible behind the pigment |
Material Purity | Highest — no pigment, no filler hiding anything, very low extractables | Depends on grade and pigment |
Cost | Higher (purer compound + stricter process control) | Lower |
The simple truth
Clear silicone costs more because there is nowhere to hide. Every flaw in the material and every shortcut in the process shows up in the finished gasket. That is also why buyers trust a factory that can deliver truly clear silicone — it proves the whole production line is under control.
If you need clarity for a food, medical, or optical job, we recommend our platinum-cured high transparent grades. If you just need a soft, milky look for light diffusion, translucent gives you the effect at a lower price.
Best Applications for Clear Gaskets
A clear gasket does two jobs at once: it seals, and it lets you see. That combination makes it the first choice anywhere operators need to inspect what is happening behind the seal:
Medical devices
fluid path seals, pump housings, and diagnostic cartridges where technicians must visually confirm flow, alignment, or liquid presence. USP Class VI clear compounds are available.
Laboratory instruments
analyzer seals, sample chamber gaskets, and microfluidic devices where the whole point is to observe the process.
Optical devices
lens seals, sensor windows, and lighting fixtures that need high light transmission with a flexible,
weatherproof seal.
Food and beverage equipment
sight glass seals, filler and dispenser gaskets, and inspection windows where operators watch the product pass. FDA compliant, odorless, and tasteless.
Electronics
display gaskets, LED lighting seals, and indicator window gaskets where light must pass through the seal without distortion.
Pharmaceutical and bioprocess lines
sanitary gaskets for high-purity water and process equipment, where a clear, pigment-free seal signals cleanliness and lets operators spot contamination instantly.
A simple test: if your maintenance team ever needs to look through the seal — to check fluid, alignment, cleanliness, or light — a clear gasket is the right gasket.
What Is Transparent / Clear Silicone?
Transparent silicone is the purest-looking member of the silicone family — a silicone rubber with no pigment and almost no filler, so light passes straight through it. Standard silicone is milky or cloudy because of the fillers inside; clear silicone replaces that recipe with high-purity polymers and a platinum curing system that leaves no residue to scatter the light. The result ranges from translucent (light passes, shapes are visible) to glass-clear (over 90% light transmission, almost like looking through water), depending on the grade you choose. And underneath the clarity, it is still real silicone — flexible, temperature-resistant, and built to seal for years.
Key Properties of Transparent / Clear Silicone
