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SILISIL RTV MF-Soft 12

SILISIL RTV MF-Soft 12

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SILISIL RTV MF-Soft 12 — Soft pad printing silicone Shore A 12, blue — very good color transfer, from Swiss warehouse.

2K addition silicone Shore A 12 (blue, mixing ratio 1:1) — very good color release.

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  • brand
  • Mixing ratio
  • Networking type
  • Paint has hardened
  • Self-leveling
  • Density (g/cm³)
  • Viscosity uncrosslinked (mPa·s)
  • Electrical insulation
  • Potting time (min)
  • Demolding time (min)
  • Full networking (h)
  • Food contact
  • Suitable for medical use
  • Certificates
  • Shore hardness A (cured)
  • Tensile strength (MPa)
  • Elongation at break (%)
  • Container

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Mold making SILISIL silicone RTV-2 Swiss bearing Addition Platinum Prototyping Shore A 12 Swiss brand 2K Moulding / Mold making

 
General Terms and Conditions.

Shipping usually within 1 to 3 business days
(availability will be confirmed after ordering)

. Express logistics. Fast and reliable within Switzerland & Europe.

Shipping from Swiss warehouse within 24 hours. Batch certificate. Invoice within 30 days (B2B). Technical support.
Shipping & Delivery

Usually 1 to 3 working days

Availability will be confirmed after order receipt.

Express logistics within Switzerland & Europe.

General Terms and Conditions →

Product data

HS code: 3910.0000

HS code: 3910.0000

SILISIL RTV MF-Soft 12
SILISIL RTV MF-Soft 12
SILISIL ·

SILISIL RTV MF-Soft 12 is a room temperature vulcanizing 2-component addition silicone (platinum cross-linking, RTV-2) of the MF-Mold & Form series — Soft pad printing silicone Shore A 12, blue — very good color transfer.

The mixture is prepared in a 1:1 ratio by weight (tolerance ±5%). Pot life at 23°C is approximately 20 minutes, demolding after approximately 90 minutes, and complete curing after 24 hours. Temperature resistant from -40°C to +200°C.

Key feature

Suitable for pad printing with excellent ink transfer — Shore A 12 and 550% elongation at break guarantee stable printing and long service life of the printing pads.

SILISIL RTV MF-Soft 12 in figures
A 12
Shore hardness
3'500
mPa·s viscosity
20 min
Pot life @23 °C
550 %
Elongation at break

What distinguishes SILISIL RTV MF-Soft 12

Very good flow properties
Excellent flow properties — suitable for detailed models and microstructures.
Excellent ink transfer for pad printing
Excellent color release — clean ink transfer from the printing plate to the workpiece.
High mechanical resistance
High mechanical strength — robust shape with constant properties under load.
Very good elastic recovery behavior
Stable recovery after pressure — consistent print quality over thousands of pad cycles.
Elongation at break 550%
High elasticity — safe demolding of complex geometries without damage to the mold or the original.
Temperature resistant from -40 to +200 °C
Expanded range of applications for hot wax applications and mold storage in extreme climates.

What is SILISIL RTV MF-Soft 12 used for?

Soft printing pads for pad printing
Soft silicone tampons (Shore A 12, industry standard) for precise color transfer from the cliché to plastic, glass and metal parts.
High-resolution reproduction methods
Excellent flowability (3,500 mPa·s) for microscopic detail reproduction in small and medium-sized production runs.
Soft-touch components and membranes
Flexible industrial components with high elongation at break (550%) and excellent recovery — keyboards, operating membranes, grippers.
Skin simulation for training models
Anatomical teaching and simulation models in medical and nursing education — soft tactile sensation with lasting mechanical stability.
Vibration and acoustic damping
Industrial dampers and bearings with high deformability and rebound — precise mechanical decoupling.
Multi-layered shapes for complex undercuts
Tear-resistant layers can be built up on top of each other and safely demolded — suitable for multi-part tools.

processing

1
Prepare the original
The surface to be reproduced must be clean, dry, and dust-free. The ideal processing temperature is 23°C — cooler environments significantly extend the pot life and curing time.
2
homogenize and mix components
Stir the base and catalyst thoroughly before use. Weigh out 1:1 by weight (tolerance ±5%). When mixing, thoroughly incorporate the mixture into the container walls and bottom.
3
Vacuum venting
For non-porous molds, briefly de-aerate the mixture under vacuum — trapped air bubbles are removed and a smooth mold surface is guaranteed.
4
Pour slowly into the mold
Pour in a thin stream from a height of approximately 30 cm into the lowest point — the silicone displaces air on its own and reaches all undercuts.
5
Vulcanizing and demolding
At 23 °C, demolding is possible after approximately 90 minutes; complete curing takes 24 hours. A 24-hour "maturation phase" is required before the first casting to ensure maximum strength.
Data sheets & safety data sheet
Full TDS and SDS in DE, EN, FR — view or download directly.
To the documents →

Important instructions

Avoid crosslinking inhibitors
Additive systems like MF-Soft 12 are sensitive to sulfur, amine, tin, and phosphorus compounds—especially latex gloves, modeling clay, adhesive tapes, and some paints. If in doubt, make a small test cast before use.
Storage and shelf life
In its unopened original container, the product has a shelf life of at least 12 months when stored in a dry, cool place (10–25 °C). Consult the Safety Data Sheet (SDS) before opening.
Available packaging
1 kg + 1 kg, 5 kg + 5 kg, 25 kg + 25 kg, 200 kg + 200 kg. Other container sizes available on request.
compatibility
Compatible with polyurethane, epoxy, and polyester casting resins. Apply a release agent to protect the mold when using aggressive resins.

Recommended accessories

SILISIL Vaseline release paste white
Universal release agent for polyester, epoxy and polyurethane casts — protects the silicone mold from aggressive resins and extends the mold's lifespan.
View product →
SILISIL Delayer PA
Retarder for addition silicones — extends pot life and setting time for more complex multi-part structures and relaxed processing.
View product →
SILISIL Silicone Remover
Cleaning agent for silicone residues on tools, models and work surfaces — gentle and effective.
View product →

Which MF silicone for which application?

SILISIL RTV MF-Soft 12 in direct comparison with related MF products in our range (MF = Mold & Form).

MF-Soft 12
Current product 		MF-Soft 00 →MF-Soft 13 TP →MF-Dura 32 →
Shore hardness A1201332
Mixed viscosity3'5001'5004'5006'000
ColorBlueTranslucentTranslucentreddish-brown
Pot life @23 °C205–74510
Topics & Application Areas
Key terms related to this product. Also useful for our search and filters.
Mold making SILISIL silicone RTV-2 Swiss bearing Addition Platinum Prototyping Shore A 12 Swiss brand 2K Moulding / Mold making

Technical data for SILISIL RTV MF-Soft 12

All 18 product information 4 Physical properties 4 Electrical properties 1 Curing values ​​3 Product approvals 3 Mechanical properties 3
Product information
brand SILISIL
Mixing ratio 1:1
Networking type Addition (Platinum)
Container 1kg + 1kg, 5kg + 5kg, 10kg + 10kg, 25kg + 25kg
Physical properties
Paint has hardened Blue
Self-leveling Yes
Density (g/cm³) 1.1
Viscosity uncrosslinked (mPa·s) 3500
Electrical properties
Electrical insulation Yes
Curing values
Potting time (min) 20
Demolding time (min) 90
Full networking (h) 24
Product approvals
Food contact No
Suitable for medical use No
Certificates RoHS, REACH
Mechanical properties
Shore hardness A (cured) A 12
Tensile strength (MPa) 8.6
Elongation at break (%) 550

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

Documents and datasheets

Click on a document for a preview or the download icon for a direct download.

Technical Data Sheets (TDS) 3
SILISIL RTV MF-Soft 12 - Technical Data Sheet DE.pdf
125 KB
SILISIL RTV MF-Soft 12 - Technical Data Sheet EN.pdf
125 KB
SILISIL RTV MF-Soft 12 - Fiche Technique FR.pdf
125 KB

Frequently asked questions about SILISIL RTV MF-Soft 12

Practical application and design questions — answered by SILITECH.

SILISIL RTV MF-Soft 12 is a two-component (Shore A 12, blue) additive silicone for soft printing pads used in pad printing and related applications. Soft pad printing silicone, Shore A 12, blue — very good ink transfer

At 23 °C, the pot life is approximately 20 minutes and the demolding time approximately 90 minutes. Complete curing is achieved after 24 hours. Lower temperatures extend, higher temperatures shorten these times.

As an addition system, SILISIL RTV MF-Soft 12 is sensitive to crosslinking inhibitors: sulfur, amine, tin, and phosphorus compounds can locally halt vulcanization. Avoid latex gloves, sulfur-containing modeling clays, some adhesive tapes, and PVC plasticizers in the immediate vicinity of the mold. If in doubt, make a small test cast.

SILISIL RTV MF-Soft 12 is mixed in a 1:1 ratio by weight (base to catalyst), with a maximum tolerance of ±5%. Homogenize both components separately before mixing, then thoroughly incorporate them – including the container walls and bottom. Brief vacuum degassing of the mixture is recommended for non-porous molds.

SILISIL RTV MF-Soft 12 achieves a Shore A hardness of 12 (ASTM D 2240), a tensile strength of 8.6 N/mm² (ASTM D 412), an elongation at break of approximately 550% and a tensile strength of 8.6 N/mm (ASTM D 624).

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Product specifications

Product information
Container 1kg + 1kg or 5kg + 5kg or 10kg + 10kg or 25kg + 25kg
brand SILISIL
Mixing ratio 1:1
Networking type Addition (Platinum)
Physical properties
Paint has hardened Blue
Self-leveling Yes
Density (g/cm³) 1.1
Viscosity uncrosslinked (mPa·s) 3500
Electrical properties
Electrical insulation Yes
Curing values
Potting time (min) 20
Demolding time (min) 90
Full networking (h) 24
Product approvals
Certificates RoHS or REACH
Food contact No
Suitable for medical use No
Mechanical properties
Shore hardness A (cured) A 12
Tensile strength (MPa) 8.6
Elongation at break (%) 550
Keywords
Keywords
Mold making SILISIL silicone RTV-2 Swiss bearing Addition Platinum Prototyping Shore A 12 Swiss brand 2K Moulding / Mold making

Documents and datasheets

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