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SILISIL RTV MF-Soft 13 TP

SILISIL RTV MF-Soft 13 TP

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SILISIL RTV MF-Soft 13 TP — Translucent soft silicone Shore A 13 for visible casting, available from Swiss stock.

2K Additive Silicone Shore A 13 (Translucent, Mixing Ratio 1:1) — Translucent soft silicone Shore A 13 for visible casting.

Price on request

  • Brand
  • Mixing Ratio
  • Curing type
  • Cured Color
  • Self-leveling
  • Density (g/cm³)
  • Uncrosslinked viscosity (mPa·s)
  • Electrical Insulation
  • Pot life (min)
  • Demolding time (min)
  • Full cure (h)
  • Food contact
  • Medical grade
  • Certificates
  • Shore hardness A (cured)
  • Elongation at break (%)
  • Container

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Mold making SILISIL silicone RTV-2 Swiss bearing additive platinum prototyping Swiss brand 2K mold making Shore A 13

 
General Terms and Conditions

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

Express logistics. Fast and reliable within Switzerland & Europe

From Swiss stock Dispatch within 24h Batch certificate Invoice 30 days (B2B) Technical advice
Shipping & Delivery

Usually 1 to 3 business days

Availability is confirmed after order receipt.

Express logistics within Switzerland & Europe.

Terms and Conditions →

Product data

HS Code: 3910.0000

HS Code: 3910.0000

SILISIL RTV MF-Soft 13 TP
SILISIL RTV MF-Soft 13 TP
SILISIL ·

SILISIL RTV MF-Soft 13 TP is a room temperature vulcanizing 2-component addition silicone (platinum crosslinking, RTV-2) of the MF-Mold & Form series — translucent soft silicone Shore A 13 for visible casting.

The mixture is prepared in a 1:1 ratio by weight (tolerance ±5%). Pot life at 23°C is approximately 45 minutes, demolding is possible after approximately 8 hours, and complete curing takes 24 hours. Temperature resistant from -40°C to +200°C.

Key property

Translucent soft silicone with a long pot life (45 min) — air inclusions remain visible, the embedded original is recognizable upon demolding, and the long pot life allows for complex casting processes.

SILISIL RTV MF-Soft 13 TP in figures
A 13
Shore Hardness
4'500
mPa·s viscosity
45 min
Pot life @23 °C
500 %
Elongation at break

What distinguishes SILISIL RTV MF-Soft 13 TP

Translucent for visible pouring
Air inclusions, mold filling, and the embedded original are visible during processing and demolding.
Low viscosity 4'500 mPa·s
Low mixed viscosity — flows into finest structures without air entrapment, vacuum degassing optional.
Elongation at break 500%
High elasticity — reliable demolding of complex geometries without damaging the mold or the original.
Tensile strength 12 N/mm
Solid tear resistance — sufficient for medium series with standard materials.
Long cooking time 45 minutes
Very short processing time — suitable for high-throughput production with short mold cycles.
Mixing ratio 1:1 by weight
Simple 1:1 ratio — hand-mixable without a precision scale, ideal for workshops and hobbyists.

What is SILISIL RTV MF-Soft 13 TP used for?

Jewelry and designer studio forms
Translucent mold for precious metal and resin castings — the long pot life (45 min) allows time for multi-part construction.
Complex undercuts with visual inspection
During demolding, the original is visible through the translucent form — precise demolding cut, no risk of damage.
Multi-component replicas
Soft-Touch + Harder Support Layer — MF-Soft 13 TP is the soft layer for hybrid molds with other MF products.
Anatomical-medical training models
Training models for minimally invasive procedures with an ultra-soft consistency — 500% elongation protects the finest structures.
Restoration and museum replicas
Gentle molding of historical originals — the low hardness protects sensitive surfaces.
Designer prototypes and architectural models
Long pot life allows for complex, multi-stage casting — ideal for large-format design studies and architectural models.

Processing

1
Prepare the original
The surface to be reproduced must be clean, dry, and free of dust. The ideal processing temperature is 23 °C — cooler environments significantly extend pot life and curing time.
2
Homogenize and mix components
Stir base and catalyst thoroughly before use. Weigh out 1:1 by weight (tolerance ±5%). When mixing, thoroughly incorporate the walls and bottom of the container.
3
Vacuum degassing
For pore-free molds, briefly degas the mixture under vacuum — entrapped air bubbles are removed, ensuring a smooth mold surface.
4
Pour slowly into the mold
Pour from a height of approx. 30 cm in a thin stream into the deepest point — the silicone displaces air independently and reaches all undercuts.
5
Vulcanize and demold
At 23 °C, demolding is possible after approximately 8 hours, with complete curing after 24 hours. A 24-hour "maturation phase" is required before the first casting to ensure maximum strength.
Data Sheets & Safety Data Sheet
Complete TDS and SDS in DE, EN, FR — view or download directly.
To the documents →

Important Notes

Avoid crosslinking inhibitors
Additive systems like MF-Soft 13 TP 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
Shelf life of at least 12 months in unopened original container when stored in a dry, cool place (10–25 °C). Consult the Safety Data Sheet (SDS) before opening.
Available containers
1 kg + 1 kg, 5 kg + 5 kg, 25 kg + 25 kg. Other container sizes available on request.
Compatibility
Compatible with polyurethane, epoxy, and polyester casting resins. For aggressive resins, apply a release agent to protect the mold.

Recommended accessories

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

Which MF silicone for which application?

SILISIL RTV MF-Soft 13 TP in direct comparison with related MF products in our range (MF = Mold & Form).

MF-Soft 13 TP
Current Product 		MF-Soft 00 →MF-Soft 12 →MF-Flex 25 →
Shore hardness A1301224
Mixed viscosity4'5001'5003'5004'500
ColorTranslucentTranslucentBlueTransparent
Pot life @23 °C455–72020
Topics & Application Fields
Key terms related to this product. Also useful for our search and filters.
Mold making SILISIL silicone RTV-2 Swiss bearing additive platinum prototyping Swiss brand 2K mold making Shore A 13

Technical data for SILISIL RTV MF-Soft 13 TP

All 17 Product Information 4 Physical Properties 4 Electrical Properties 1 Curing Values 3 Product Approvals 3 Mechanical Properties 2
Product Information
Brand SILISIL
Mixing Ratio 1:1
Curing type Addition (Platinum)
Container 500 g + 500 g, 1 kg + 1 kg, 5 kg + 5 kg, 10 kg + 10 kg, 25 kg + 25 kg
Physical Properties
Cured Color Translucent
Self-leveling Yes
Density (g/cm³) 1.07
Uncrosslinked viscosity (mPa·s) 4500
Electrical Properties
Electrical Insulation Yes
Curing values
Pot life (min) 45
Demolding time (min) 8
Full cure (h) 24
Product Approvals
Food contact No
Medical grade No
Certificates RoHS, REACH
Mechanical properties
Shore hardness A (cured) A 13
Elongation at break (%) 500

Please refer to the technical data sheet (TDS) in the "Documents" tab for binding values.

Documents and data sheets

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

Technical Data Sheets (TDS) 3
SILISIL RTV MF-Soft 13 TP - Technical Data Sheet DE.pdf
124 KB
SILISIL RTV MF-Soft 13 TP - Technical Data Sheet EN.pdf
124 KB
SILISIL RTV MF-Soft 13 TP - Fiche Technique FR.pdf
124 KB
Safety Data Sheets (SDS) 1
SILISIL RTV MF-Soft 13 TP - Safety Data Sheet EN.pdf
342 KB

Frequently asked questions about SILISIL RTV MF-Soft 13 TP

Practical application and design questions — answered by SILITECH.

SILISIL RTV MF-Soft 13 TP is a two-component (Shore A 13, translucent) additive silicone for jewelry and designer studio molds and related applications. Translucent soft silicone Shore A 13 for visible casting

At 23 °C, the pot life is approximately 45 minutes and the demolding time approximately 8 hours. Complete curing is achieved after 24 hours. Lower temperatures extend, higher temperatures shorten these times.

As an addition system, SILISIL RTV MF-Soft 13 TP 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 13 TP 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 13 TP achieves a Shore A hardness of 13 (ASTM D 2240), a tensile strength of >3.0 N/mm² (ASTM D 412), an elongation at break of approximately 500% and a tensile strength of 12 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
Curing type Addition (Platinum)
Physical Properties
Cured Color Translucent
Self-leveling Yes
Density (g/cm³) 1.07
Uncrosslinked viscosity (mPa·s) 4500
Electrical Properties
Electrical Insulation Yes
Curing values
Pot life (min) 45
Demolding time (min) 8
Full cure (h) 24
Product Approvals
Certificates RoHS or REACH
Food contact No
Medical grade No
Mechanical properties
Shore hardness A (cured) A 13
Elongation at break (%) 500
Keywords
Keywords
Mold making SILISIL silicone RTV-2 Swiss bearing additive platinum prototyping Swiss brand 2K mold making Shore A 13

Documents and data sheets

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