PlatSil Gel-25 – Platinum-Cure Silicone Gel for Mold Making & Prototyping

Name: PlatSil Gel-25 – Platinum-Cure Silicone Gel for Mold Making & Prototyping
Brand: Polytek
SKU: S82191
Price: 55.23 EUR

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PlatSil Gel-25 – Platinum-Cure Silicone Gel for Mold Making & Prototyping

PlatSil Gel-25 is a 1A:1B platinum-cured silicone with a Shore hardness of A25. It has a 5-minute working time and a 60-minute demold time. Suitable for mold making, prosthetics, and lifecasting. Independently certified skin-safe. Read more

€55,23 Incl. BTW

SKU: S82191

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1 kg. Set

€55,23

€55,23/kg

2 kg. Set

Save €25,40 by volume

€85,06

€42,53/kg

10 kg. Set

Save €200,30 by volume

€352,00

€35,20/kg

36.36 kg. Set

Save €840,41 by volume

€1.167,75

€32,11/kg

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PlatSil Gel-25 is a 1A:1B platinum-cured silicone with a Shore hardness of A25. It has a 5-minute working time and a 60-minute demold time. Suitable for mold making, prosthetics, and lifecasting. Independently certified skin-safe.

Premium Platinum-Cure Silicone Gel for Professional Applications

PlatSil Gel-25 is a firm, platinum-cured silicone gel from Polytek Development Corp. with a Shore A25 hardness — the most dimensionally stable variant within the PlatSil Gel line. With a low viscosity of 3,500 cP and a simple 1A:1B mixing ratio (by weight or volume), this system is ideally suited for detailed molds, prototyping, and industrial casting applications.

Key Benefits

Skin-Safe Certified: Independently certified according to FHSA, ASTM D4236, and FDA requirements — safe for direct skin contact.
High Dimensional Stability: Shore A25 hardness for molds requiring dimensional accuracy with repeated use.
Low Viscosity: 3,500 cP for excellent detail reproduction and easy pouring without vacuum equipment.
High Mechanical Strength: 434 psi tensile strength and 146 pli tear strength (Die B) for long-term use in production environments.
Adjustable Hardness: Part H Hardener increases Shore hardness up to A40 for even firmer applications.
Broad Accessory Ecosystem: Compatible with PlatThix (thickener), SiliColors (pigments), Part X Accelerator, and Part R Retarder.

Typical Applications

Mold making of industrial models with high detail accuracy
Prototyping of rigid flexible parts in product design and engineering
Casting of polyurethane, epoxy, and polyester resin in production series
SFX and theatrical prosthetics where firmness and sharp edges are required
Educational and artistic sculpture molds for repeated use
Automotive and industrial applications where dimensional stability is essential

Technical Characteristics

PlatSil Gel-25 is mixed at a 1A:1B ratio by weight or volume, with a pour time of 5 minutes and a demold time of 60 minutes at 73°F. Shore hardness: A25. Viscosity: 3,500 cP. Elongation: 385%. Tensile strength: 434 psi. Cured color: milky white. Specific gravity: 1.1. Store at 15–32°C in unopened original packaging; shelf life up to 6 months after opening.

Polytek Development Corp. is an American specialist in polyurethane and silicone systems for professional mold making, life casting, and industrial applications, with over 40 years of experience in the sector.

Professional Support

Do you have technical questions about the correct formulation, additives, or processing conditions for your specific application? Our team is ready with product-specific advice based on your project. Contact us for personalized guidance.

Safety Information

May cause mild eye and skin irritation. Keep out of reach of children. Use in a well-ventilated area. Wear nitrile or butyl rubber gloves and safety glasses.

Safety Pictograms	Safety Data Sheets (SDS)
	📥 EN Platsil Gel MSDS

Signal Word	H‑code	Hazard Statement	P‑codes	P‑statements

More information about H and P statements can be found at UK HSE and ECHA.

Product Properties

Hardness
25Shore A
Hardness of the silicone material
Color Milk white Color of the finished product
Transparency No - milky white Degree of transparency
Viscosity
3500mPa·s
Viscosity of the uncured silicone
Density
1.1g/cm³
Density of the cured material
Mix ratio 1A:1B Mixing ratio A : B
Tensile strength
2.992MPa
Maximum tensile force before breaking
Tear strength
146.0kN/m
Resistance against tearing
Elongation at break
385%
Maximum stretch before breaking
Pot life
5minuten
Working time after mixing
Cure time
60minuten
Time until full cure

Electrical Properties

Insulating true Prevents electric current flow

Certification & Safety

Moisture resistant true Resistant to moisture

Application

Use case Mould making, theatrical prosthetics, lifecasting Intended use
Silicone type ["Platinum-curing (addition cure)"] Type of silicone
Cure speed Preparation time: 5 minutes • Cooling time: 60 minutes Speed of curing

Our story

Our story began with our father, the founder of Nedform BV. We— Roel, Rutger, and Rob Collaris —are his sons and wanted to bring his passion and knowledge to the online world. That's how SAM (Silicones and More) was born—a creative space for everyone.

Whether you're a beginner, an expert, or an enthusiastic DIYer looking for the right tools, materials, and some guidance, you've come to the right place. We've worked with silicones, resins, and casting materials ourselves for years. That's why we not only deliver quality but also genuine support—based on experience.

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FAQs

What is the delivery time of my order?

Orders placed and paid for on business days will be shipped on the same day in most cases. Orders received on weekends will be processed on the next business day.

We always do our best to ship orders as quickly as possible, but actual shipping times may vary due to high volume, stock availability, or carrier circumstances.

Delivery time depends on the destination country and the carrier. Below is a general indication:

Netherlands: usually within 1 business day
Belgium & Germany: typically within 1–2 business days
Other countries: depends on the destination and the local carrier

Please note: these are guidelines, not guarantees. The final delivery time may differ due to factors beyond our control, such as sorting center delays, public holidays, or exceptionally high volume.

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We offer a 30-day return policy as an added service. If you'd like to return an item or if there's something wrong with your order, please email us at info@siliconesandmore.com with your name and order number within 30 days of delivery. We'll help you quickly. The full terms and conditions can be found on our returns page.

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PlatSil Gel-25 – Platinum-Cure Silicone Gel for Mold Making & Prototyping

PlatSil Gel-25 – Platinum-Cure Silicone Gel for Mold Making & Prototyping

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