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SILISIL RTV MF-Dura 32

SILISIL RTV MF-Dura 32

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SILISIL RTV MF-Dura 32 — 2-component addition-cure silicone, Shore A 32, for detailed mold making and pad printing molds, available from our Swiss warehouse.

2-component addition-cure silicone, Shore A 32 (brown-red, mixing ratio 1:1) — 2-component addition-cure silicone, Shore A 32, for high-detail mold making and pad printing plates.

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  • brand
  • mixing ratio
  • network type
  • Density (g/cm³)
  • Viscosity (uncrosslinked) (mPa·s)
  • Paint cured
  • Self-leveling
  • Pot life (min)
  • Demolding time (min)
  • Full connectivity (h)
  • Shore A hardness (cured)
  • Tensile strength (MPa)
  • Elongation at break (%)
  • Tensile strength (N/mm)
  • Electrical insulation
  • Certificates
  • food contact
  • Suitable for medical use
  • container
  • mixing ratio
  • Temperature range (°C)

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Mold Making SILISIL Silicone RTV-2 Swiss warehouse Addition Platinum Prototyping Swiss brand 2K Molding / Mold Making Shore A 32

 
Terms and Conditions

Shipping usually within 1 to 3 business days
(Availability will be confirmed after order placement)

Express logistics. Fast and reliable within Switzerland & Europe

Ships from our Swiss warehouse Shipped within 24 hours Batch certificate 30-day invoice (B2B) Technical support
Shipping & Delivery

Usually 1 to 3 business days

Availability will be confirmed once the order is received.

Express logistics within Switzerland and Europe.

Terms and Conditions →

Product Information

HS Code: 3910.0000

HS code: 3910.0000

SILISIL RTV MF-Dura 32
SILISIL RTV MF-Dura 32
SILISIL ·

SILISIL RTV MF-Dura 32 is a room-temperature vulcanizing two-component addition-curing silicone (platinum-cured, RTV-2) from the MF-Mold & Form series — a two-component addition-curing silicone with a Shore A hardness of 32, designed for detailed mold making and pad printing molds.

The mixture is prepared in a 1:1 ratio by weight (tolerance ±5%). Pot life at 23 °C is approximately 10 minutes; demolding is possible after approximately 90 minutes; full cure is achieved after 24 hours. Temperature resistance: –40 °C to +200 °C.

Key feature

Suitable for food contact in chocolate molds up to 70 °C — 1:1 addition system by weight, addition-curing, low-shrinkage, and temperature-resistant from −40 to +200 °C.

SILISIL RTV MF-Dura 32 by the Numbers
A 32
Shore hardness
6,000
mPa·s viscosity
10 min
Pot life @23 °C
370%
elongation at break

What sets SILISIL RTV MF-Dura 32 apart

Vulcanization at room temperature
Cures at room temperature—no oven, no UV lamp, and no special equipment required.
High tensile strength
High tear strength — resistant to mechanical stress during demolding.
No shrinkage
Shrink-free during addition curing — the part is dimensionally stable immediately, with no waiting time.
High dimensional accuracy and precision
High dimensional accuracy — the mold retains its shape even after prolonged storage.
Tested for chocolate applications up to 70 °C
Food-safe following appropriate certification testing — ideal for chocolate and confectionery up to 70 °C.
Good processing viscosity
Practical viscosity — flows well but remains manageable when applied in multiple layers.

What is SILISIL RTV MF-Dura 32 used for?

Chocolate and Pastry Molds
Food-safe up to 70 °C — precision molds for chocolates, pralines, and chocolate bars, designed for artisanal chocolatiers and professional pastry shops.
Printing pads for pad printing
Silicone tampons with excellent ink transfer and dimensional stability—transfer ink from the printing plate to plastic, glass, and metal parts in industrial marking applications.
High-detail molds for small-batch production
Reproduction of intricate models featuring lettering, microstructures, and sharp edges—jewelry, toy prototypes, decorative components.
Concrete and stone replicas
Excellent compatibility with cement-based mixtures — paving stones, facade elements, and decorative architectural components in small batches.
Undercuts and negative molds
An elongation at break of 370% and a tensile strength of 10 N/mm allow complex geometries to be demolded without damage.
Industrial Master Models
Shrink-arm reproduction of master models for vacuum casting, resin casting, and small-batch manual production.

processing

1
Prepare the original
The surface to be coated must be clean, dry, and free of dust. The ideal application temperature is 23 °C—cooler environments significantly extend the pot life and curing time.
2
Homogenize and mix the components
Stir the base and catalyst thoroughly before use. Weigh out a 1:1 ratio by weight (tolerance ±5%). When mixing, make sure to thoroughly incorporate the mixture along the sides and bottom of the container.
3
Vacuum venting
To ensure pore-free molds, briefly degas the mixture under vacuum—this removes trapped air bubbles and ensures a smooth mold surface.
4
Pour slowly into the mold
Pour in a thin stream from a height of about 30 cm into the deepest part—the silicone will displace the air on its own and reach all the undercuts.
5
Vulcanization and demolding
At 23 °C, the part can be removed from the mold after approximately 90 minutes; full curing occurs after 24 hours. Allow a 24-hour "curing period" before the first casting to ensure maximum strength.
Data Sheets & Safety Data Sheets
Complete TDS and SDS in German, English, and French — view online or download.
Go to the documents →

Important information

Avoid cross-linking inhibitors
Additive systems such as MF-Dura 32 are sensitive to sulfur, amine, tin, and phosphorus compounds—particularly latex gloves, modeling compounds, adhesive tapes, and some paints. If in doubt, make a small test casting before use.
Storage and shelf life
When stored unopened in its original container in a dry, cool place (10–25 °C), the product has a shelf life of at least 12 months. Consult the Safety Data Sheet (SDS) before opening.
Available sizes
1 kg + 1 kg, 5 kg + 5 kg, 25 kg + 25 kg, 200 kg + 200 kg. Other package sizes available upon request.
Compatibility
Compatible with polyurethane, epoxy, and polyester casting resins. When using aggressive resins, apply a release agent to protect the mold.

Recommended Accessories

SILISIL Vaseline release paste, white
Universal release agent for polyester, epoxy, and polyurethane castings — protects the silicone mold from aggressive resins and extends the mold's service life.
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SILISIL Delayer PA
Retarder for addition-cure silicones — extends pot life and setting time for more complex multi-component systems and allows for easier processing.
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SILISIL Silicone Remover
Cleaner for silicone residue on tools, models, and work surfaces — gentle yet effective.
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Which MF silicone is best for which application?

SILISIL RTV MF-Dura 32 in direct comparison with related MF products in our product range (MF = Mold & Form).

MF-Dura 32
Current Product 		MF-Dura 30 →MF-Dura 35 →MF-Dura 40 →
Shore A hardness32?3340
Mixed viscosity6,000?7,5005,500
Colorbrownish red?Translucentblue
Pot life @23 °C10?2050
Topics & Areas of Application
Keywords related to this product. Also useful for our search and filter functions.
Mold Making SILISIL Silicone RTV-2 Swiss warehouse Addition Platinum Prototyping Swiss brand 2K Molding / Mold Making Shore A 32

Technical Specifications for SILISIL RTV MF-Dura 32

All 21 Product information 6 Physical Properties 4 Curing values 3 Mechanical Properties 4 Electrical properties 1 Product approvals 3
product information
brand SILISIL
mixing ratio 1:1
network type Addition (Platinum)
container 500 g + 500 g, 1 kg + 1 kg, 5 kg + 5 kg, 10 kg + 10 kg, 25 kg + 25 kg
mixing ratio 1:1
Temperature range (°C) –40°C to 200°C
Physical properties
Density (g/cm³) 1.17
Viscosity (uncrosslinked) (mPa·s) 6000
Paint cured brownish red
Self-leveling Yes
curing values
Pot life (min) 10
Demolding time (min) 90
Full connectivity (h) 24
Mechanical properties
Shore A hardness (cured) A 32
Tensile strength (MPa) 4.5
Elongation at break (%) 370
Tensile strength (N/mm) 10
Electrical Properties
Electrical insulation Yes
product approvals
Certificates RoHS, REACH
food contact Yes
Suitable for medical use No

For binding values, please refer to the technical data sheet (TDS) in the "Documents" tab.

Documents and Data Sheets

Click on a document to view a preview, or click the download icon to download it directly.

Technical Data Sheets (TDS) 3
SILISIL RTV MF-Dura 32 - Technical Data Sheet (German).pdf
125 KB
SILISIL RTV MF-Dura 32 - Technical Data Sheet EN.pdf
125 KB
SILISIL RTV MF-Dura 32 - Technical Data Sheet FR.pdf
125 KB
Safety Data Sheets (SDS) 3
SILISIL RTV MF-Dura 32 - Safety Data Sheet (German).pdf
316 KB
SILISIL RTV MF-Dura 32 - Safety Data Sheet EN.pdf
336 KB
SILISIL RTV MF-Dura 32 - Safety Data Sheet (FR).pdf
342 KB

Frequently Asked Questions About SILISIL RTV MF-Dura 32

Practical questions regarding application and design — answered by SILITECH.

SILISIL RTV MF-Dura 32 is a two-component addition-cure silicone (Shore A 32, brown-red) designed for chocolate and confectionery molds and related applications. Two-component addition-cure silicone (Shore A 32) for detailed mold making and pad printing molds

At 23 °C, the pot life is approximately 10 minutes and the demolding time is approximately 90 minutes. Full cure is achieved after 24 hours. Lower temperatures extend these times, while higher temperatures shorten them.

As an addition-curing system, SILISIL RTV MF-Dura 32 is sensitive to cross-linking inhibitors: sulfur, amine, tin, and phosphorus compounds can halt the curing process locally. Avoid using latex gloves, sulfur-containing modeling compounds, certain types of adhesive tape, and PVC plasticizers in the immediate vicinity of the mold. If in doubt, make a small test casting.

SILISIL RTV MF-Dura 32 is mixed in a 1:1 ratio by weight (base to catalyst), with a tolerance of no more than ±5%. Homogenize both components separately before mixing, then work the mixture in thoroughly—including the sides and bottom of the container. Brief vacuum degassing of the mixture is recommended to ensure pore-free molds.

SILISIL RTV MF-Dura 32 achieves a Shore A hardness of 32 (ASTM D 2240), a tensile strength of >4.5 N/mm² (ASTM D 412), an elongation at break of approx. 370%, and a tear resistance of 10 N/mm (ASTM D 624).

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product specifications

product information
container 500 g + 500 g or 1 kg + 1 kg or 5 kg + 5 kg or 10 kg + 10 kg or 25 kg + 25 kg
brand SILISIL
mixing ratio 1:1
network type Addition (Platinum)
mixing ratio 1:1
Temperature range (°C) –40°C to 200°C
Physical properties
Density (g/cm³) 1.17
Viscosity (uncrosslinked) (mPa·s) 6000
Paint cured brownish red
Self-leveling Yes
curing values
Pot life (min) 10
Demolding time (min) 90
Full connectivity (h) 24
Mechanical properties
Shore A hardness (cured) A 32
Tensile strength (MPa) 4.5
Elongation at break (%) 370
Tensile strength (N/mm) 10
Electrical Properties
Electrical insulation Yes
product approvals
Certificates RoHS or REACH
food contact Yes
Suitable for medical use No
keywords
keywords
Mold Making SILISIL Silicone RTV-2 Swiss warehouse Addition Platinum Prototyping Swiss brand 2K Molding / Mold Making Shore A 32

Documents and Data Sheets

Safety Data Sheets (SDS) and Technical Data Sheets (TDS) available for download: