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SILISIL RTV PC-Flex 20

SILISIL RTV PC-Flex 20

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2K silicone Shore A 30 (white, mixing ratio 100:5) — robust against poisoning.

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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SILISIL Silicone RTV-2 Swiss Bearing Addition Platinum Electronic Encapsulation Shore A 20 Swiss Brand 2K Platinum Cast LED / Optoelectronics

 
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 PC-Flex 20
SILISIL RTV PC-Flex 20
SILISIL ·

SILISIL RTV PC-Flex 20 is a room temperature vulcanizing 2-component silicone of the PC — polycondensationseries (polycondensation (tin catalyst), RTV-2) — 2K polycondensation silicone Shore A 30 for flexible mold applications — robust against poisoning.

The mixture is prepared in a 100:5 ratio by weight . Pot life at 23 °C is approximately 60 minutes, demolding is possible after approximately 24 hours, and complete curing takes 72 hours. Temperature resistant from -40 °C to +200 °C.

Key property

Flexible condensation silicone — the right choice when additive resistance cannot be guaranteed. 320% elongation at break combined with high tensile strength.

SILISIL RTV PC-Flex 20 in figures
A 30
Shore Hardness
60'000
mPa·s viscosity
60 min
Pot life @23 °C
320 %
Elongation at break

What makes SILISIL RTV PC-Flex 20 stand out

Polycondensation — resistant to inhibitors
The condensation system does not react to sulfur, amine and PVC inhibitors — certainly not even to problematic originals.
Elongation at break 320%
Solid elongation at break — suitable for moderate undercuts with higher form stiffness.
Tear resistance 18 N/mm
High tear resistance — robust against mechanical stress when demolding abrasive materials.
No vacuum venting required
No vacuum venting required — suitable for workshops without a vacuum chamber.
Mixing ratio 100:5 by weight
Polycondensation standard with tin catalyst — small amount of catalyst allows pot life control.
Pot time 60 minutes — relaxed processing
Very short processing time — suitable for high-throughput production with short mold cycles.

What is SILISIL RTV PC-Flex 20 used for?

Flexible industrial forms
Shape with good elasticity for components with moderate undercuts — robust against problematic substrates.
Model and design office replicas
Continuous reproduction of design prototypes with unclear material history.
Concrete and manufactured stone applications
Paving stones, stone facades and architectural elements with concrete recipes of different compositions.
Restoration without material testing
For historical or unknown originals, polycondensation significantly reduces the risk of poisoning.
Robust small and medium series
High tensile strength (>4.1 N/mm²) for several hundred castings per mold.
No venting required — fast processing
Condensation system does not require a vacuum chamber — suitable for workshops without special equipment.

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 a 100:5 ratio by weight. Mix thoroughly, including the sides and bottom of the container.
3
Use without venting
Polycondensation does not require a vacuum — pour or apply directly.
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 24 hours, and complete hardening occurs after 72 hours.
Data Sheets & Safety Data Sheet
Complete TDS and SDS in DE, EN, FR — view or download directly.
To the documents →

Important Notes

Polycondensation — robust against inhibitors
Polycondensation system (tin catalyst) — no susceptibility to poisoning from sulfur, amines, or PVC. Vacuum venting is not strictly necessary.
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
1 kg + 0.05 kg, 5 kg + 0.25 kg. Other package sizes available on request.
Compatibility
Compatible with polyurethane, epoxy, and polyester casting resins. For aggressive resins, apply a release agent.

Recommended accessories

SILISIL THIXO AGENT PC
Thickener paste for polycondensation silicones — makes pourable silicones thixotropic for vertical and overhead applications.
To the product →
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 PC-Flex 20 in direct comparison with related products in our range (PC — polycondensation).

PC-Flex 20
Current Product		 PC-Dura 30 →PC-Soft 10 →PC-Putty 30 BASE →
Shore hardness A3030?30
Mixed viscosity60'00060'000?(Play-Doh)
ColorWhiteWhite?Light Yellow
Pot life @23 °C6060?2 (Fast) / 90 (Slow)
Mixing ratio100:5100:5?1:1
Topics & Application Fields
Key terms related to this product. Also useful for our search and filters.
SILISIL Silicone RTV-2 Swiss Bearing Addition Platinum Electronic Encapsulation Shore A 20 Swiss Brand 2K Platinum Cast LED / Optoelectronics

Technical data for SILISIL RTV PC-Flex 20

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 100:5
Curing type Addition (Platinum)
Container 1 kg, 5 kg, 20 kg, 200 kg
Physical Properties
Cured Color White
Self-leveling Yes
Density (g/cm³) 1.26
Uncrosslinked viscosity (mPa·s) 60'000
Electrical Properties
Electrical Insulation Yes
Curing values
Pot life (min) 60
Demolding time (min) 24
Full cure (h) 72
Product Approvals
Food contact No
Medical grade No
Certificates RoHS, REACH
Mechanical properties
Shore hardness A (cured) A 20
Elongation at break (%) 320

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 PC-Flex 20 - Technical Data Sheet DE.pdf
124 KB
SILISIL RTV PC-Flex 20 - Technical Data Sheet EN.pdf
123 KB
SILISIL RTV PC-Flex 20 - Fiche Technique FR.pdf
123 KB

Frequently asked questions about SILISIL RTV PC-Flex 20

Practical application and design questions — answered by SILITECH.

SILISIL RTV PC-Flex 20 is a 2K silicone from the PC polycondensation series (Shore A 30, white). This 2K polycondensation silicone (Shore A 30) is for flexible mold applications and is resistant to poisoning. It is suitable for flexible industrial molds and related applications.

At 23 °C, the pot life is approximately 60 minutes and the demolding time approximately 24 hours. Complete curing occurs after 72 hours.

SILISIL RTV PC-Flex 20 is a polycondensation (tin catalyst) system. This polycondensation system (tin catalyst) is not susceptible to poisoning from sulfur, amines, or PVC. Vacuum venting is not mandatory.

SILISIL RTV PC-Flex 20 is mixed in a 100:5 ratio by weight (base to catalyst). Homogenize both components separately before mixing, then thoroughly incorporate them – including the container walls and bottom.

SILISIL RTV PC-Flex 20 achieves a Shore A hardness of 30 (ASTM D 2240), a tensile strength of >4.1 N/mm² (ASTM D 412), an elongation at break of approximately 320% and a tensile strength of 18 N/mm (ASTM D 624).

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Product Specifications

Product Information
Container 1kg or 5kg or 20kg or 200kg
Brand SILISIL
Mixing Ratio 100:5
Curing type Addition (Platinum)
Physical Properties
Cured Color White
Self-leveling Yes
Density (g/cm³) 1.26
Uncrosslinked viscosity (mPa·s) 60'000
Electrical Properties
Electrical Insulation Yes
Curing values
Pot life (min) 60
Demolding time (min) 24
Full cure (h) 72
Product Approvals
Certificates RoHS or REACH
Food contact No
Medical grade No
Mechanical properties
Shore hardness A (cured) A 20
Elongation at break (%) 320
Keywords
Keywords
SILISIL Silicone RTV-2 Swiss Bearing Addition Platinum Electronic Encapsulation Shore A 20 Swiss Brand 2K Platinum Cast LED / Optoelectronics

Documents and data sheets

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