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SILISIL RTV RP-Tough 45 OIL B

SILISIL RTV RP-Tough 45 OIL B

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SILISIL RTV RP-Tough 45 OIL B — High-strength translucent variant Shore A 43 with high-temperature resistance up to +300 °C, available from Swiss stock.

2K silicone Shore A 43 (translucent (component B), mixing ratio 10:1) — High-strength translucent variant Shore A 43 with high-temperature resistance up to +.

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)
  • Food contact
  • Medical grade
  • Certificates
  • Shore hardness A (cured)
  • Tensile strength (MPa)
  • Elongation at break (%)
  • Container

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Mold making SILISIL silicone RTV-2 Swiss bearing additive Platinum Shore A 45 Swiss brand 2K RP-Tough

 
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 RP-Tough 45 OIL B
SILISIL RTV RP-Tough 45 OIL B
SILISIL ·

SILISIL RTV RP-Tough 45 OIL B is a room temperature vulcanizing 2-component silicone of the RP — Rapid Prototyping -series (Addition (Platinum), High Temperature, RTV-2) — High-strength translucent variant Shore A 43 with high-temperature resistance up to +300 °C.

The mixture is prepared in a 10:1 ratio by weight . Pot life at 23 °C is approximately 90 minutes, demolding is possible after approximately 15 hours, and complete curing takes 24 hours. Temperature resistant from -40 °C to +300 °C.

Key property

High-temperature variant (up to +300 °C) with tensile strength 7.5 N/mm² and tear strength >20 N/mm — the right choice for rapid prototyping with hot wax, low-melting-point metal alloys and high-temperature casts.

SILISIL RTV RP-Tough 45 OIL B in figures
A 43
Shore Hardness
35'000
mPa·s viscosity
90 min
Pot life @23 °C
400 %
Elongation at break

What distinguishes SILISIL RTV RP-Tough 45 OIL B

Temperature resistant up to +300 °C
Extended temperature range up to +300 °C — suitable for hot wax and low-temperature metal casting.
Tensile strength 7.5 N/mm²
High tensile strength of 7.5 N/mm² — significantly surpasses standard mold-making silicones.
Tensile strength >20 N/mm
Very high tensile strength >20 N/mm — robust against abrasive materials and hundreds of forming cycles.
Elongation at break 400% for Shore A 43
High elasticity — reliable demolding of complex geometries without damaging the mold or the original.
Mixing ratio 10:1 by weight
Industry standard 10:1 — precise ratio for high-quality technical molds.
Long shape lifespan
Long pot life — economical for medium series with hundreds of casts per mold.

What is SILISIL RTV RP-Tough 45 OIL B used for?

Hot wax processing
Direct wax casting up to +300 °C for jewelry wax models, restoration replications and lost-wax processes.
Low-melting alloy casting
Direct casting of Sn-Bi solders, Wood's Metal and low-temperature alloys without intermediate wax mold.
High-temperature resin casting
Polyurethane and epoxy casts with exothermic reaction (up to 200 °C peak temperature) without mold damage.
Toolmaking for pre-series production
Pre-production tools with maximum mold life for pre-series and validation castings.
Industrial micro fuse molds
Direct casting of bismuth fuses and low-temperature alloys in electrical engineering.
Research & Development
R&D applications with unknown material requirements — the high resistance reduces dimensional risks.

Processing

1
Prepare the original
Clean, dry, and dust-free surface at 23 °C — cooler environments significantly extend pot life and curing time.
2
Mix components
Stir the base and catalyst thoroughly before use. Weigh out 10:1 by weight. Mix thoroughly, including the sides and bottom of the container.
3
Vacuum degassing
For a pore-free mold, briefly vent under vacuum.
4
Processing
Pour in a thin stream from a height of approximately 30 cm — minimizing air bubbles. For modeling clay, press directly onto the model.
5
Vulcanize and demold
At 23 °C, demolding is possible after approximately 15 hours, and complete hardening occurs after 24 hours.
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
Addition system (platinum) — sensitive to sulfur, amine, tin, and phosphorus compounds. Avoid contact with latex gloves and PVC plasticizers.
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 SDS before opening.
Available containers
0.5 kg + 5 kg. Other container sizes available on request.
Compatibility
Compatible with polyurethane, epoxy, and polyester casting resins. For aggressive resins, apply a release agent.

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 Silicone Remover
Cleaning agent for silicone residues on tools, models, and work surfaces — gentle and effective.
To the product →

Which silicone for which application?

SILISIL RTV RP-Tough 45 OIL B in direct comparison with related products in our range (RP — Rapid Prototyping).

RP-Tough 45 OIL B
Current Product		 RP-Tough 45 A →MF-Ultra 70MF-Ultra 60
Shore hardness A4341??
Mixed viscosity35'00050'000??
ColorTranslucent (Comp. B)Transparent??
Pot life @23 °C9075??
Mixing ratio10:11:10??
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 Shore A 45 Swiss brand 2K RP-Tough

Technical data for SILISIL RTV RP-Tough 45 OIL B

All 17 product information 4 Physical properties 4 Electrical properties 1 Curing values ​​2 Product approvals 3 Mechanical properties 3
Product Information
Brand SILISIL
Mixing Ratio 10:1
Curing type Addition (Platinum)
Container 100 g, 500 g, 2.5 kg
Physical Properties
Cured Color Translucent
Self-leveling Yes
Density (g/cm³) 1.12
Uncrosslinked viscosity (mPa·s) 70'000
Electrical Properties
Electrical Insulation Yes
Curing values
Pot life (min) 75
Demolding time (min) 13
Product Approvals
Food contact No
Medical grade No
Certificates RoHS, REACH
Mechanical properties
Shore hardness A (cured) A 45
Tensile strength (MPa) 6
Elongation at break (%) 350

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 RP-Tough 45 OIL B - Technical Data Sheet DE.pdf
126 KB
SILISIL RTV RP-Tough 45 OIL B - Technical Data Sheet EN.pdf
126 KB
SILISIL RTV RP-Tough 45 OIL B - Fiche Technique FR.pdf
127 KB

Frequently asked questions about SILISIL RTV RP-Tough 45 OIL B

Practical application and design questions — answered by SILITECH.

SILISIL RTV RP-Tough 45 OIL B is a 2K silicone from the RP — Rapid Prototyping series (Shore A 43, translucent (Comp. B)). This high-strength translucent variant (Shore A 43) offers high-temperature resistance up to +300 °C — suitable for hot wax processing and related applications.

At 23 °C, the pot life is approximately 90 minutes and the demolding time approximately 15 hours. Complete curing occurs after 24 hours.

SILISIL RTV RP-Tough 45 OIL B is an addition (platinum), high-temperature system. This addition system (platinum) is sensitive to sulfur, amine, tin, and phosphorus compounds. Avoid contact with latex gloves and PVC plasticizers.

SILISIL RTV RP-Tough 45 OIL B is mixed in a 10:1 ratio by weight (base to catalyst). Homogenize both components separately before mixing, then thoroughly incorporate them – including the container walls and bottom.

SILISIL RTV RP-Tough 45 OIL B achieves a Shore A hardness of 43 (ASTM D 2240), a tensile strength of 7.5 N/mm² (ASTM D 412), an elongation at break of approximately 400% and a tensile strength of >20 N/mm (ASTM D 624).

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Product Specifications

Product Information
Container 100 g or 500 g or 2.5 kg
Brand SILISIL
Mixing Ratio 10:1
Curing type Addition (Platinum)
Physical Properties
Cured Color Translucent
Self-leveling Yes
Density (g/cm³) 1.12
Uncrosslinked viscosity (mPa·s) 70'000
Electrical Properties
Electrical Insulation Yes
Curing values
Pot life (min) 75
Demolding time (min) 13
Product Approvals
Certificates RoHS or REACH
Food contact No
Medical grade No
Mechanical properties
Shore hardness A (cured) A 45
Tensile strength (MPa) 6
Elongation at break (%) 350
Keywords
Keywords
Mold making SILISIL silicone RTV-2 Swiss bearing additive Platinum Shore A 45 Swiss brand 2K RP-Tough

Documents and data sheets

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