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SILISIL RTV PC-Flex 20

SILISIL RTV PC-Flex 20

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SILISIL RTV PC-Flex 20 — 2K polycondensation silicone Shore A 30 for flexible mold applications — robust against poisoning, available from Swiss stock.

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

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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)
  • 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 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 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 feature

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
Mixing components
Stir the base and catalyst thoroughly before use. Weigh out 100:5 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
Process
Pour in a thin stream from a height of approximately 30 cm — minimizing air bubbles. For modeling clay, press directly onto the model.
5
Vulcanizing and demolding
At 23 °C, demolding is possible after approximately 24 hours, and complete hardening occurs after 72 hours.
Data sheets & safety data sheet
Full TDS and SDS in DE, EN, FR — view or download directly.
To the documents →

Important instructions

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
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 SDS before opening.
Available packaging
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. Apply a release agent to aggressive resins.

Recommended accessories

SILISIL THIXO AGENT PC
Thickener paste for polycondensation silicones — makes pourable silicones thixotropic for vertical and overhead applications.
View product →
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 Silicone Remover
Cleaning agent for silicone residues on tools, models and work surfaces — gentle and effective.
View 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 Areas
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
Networking type Addition (Platinum)
Container 1kg, 5kg, 20kg, 50kg, 200kg
Physical properties
Paint has hardened White
Self-leveling Yes
Density (g/cm³) 1.26
Viscosity uncrosslinked (mPa·s) 60'000
Electrical properties
Electrical insulation Yes
Curing values
Potting time (min) 60
Demolding time (min) 24
Full networking (h) 72
Product approvals
Food contact No
Suitable for medical use No
Certificates RoHS, REACH
Mechanical properties
Shore hardness A (cured) A 20
Elongation at break (%) 320

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 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 50kg or 200kg
brand SILISIL
Mixing ratio 100:5
Networking type Addition (Platinum)
Physical properties
Paint has hardened White
Self-leveling Yes
Density (g/cm³) 1.26
Viscosity uncrosslinked (mPa·s) 60'000
Electrical properties
Electrical insulation Yes
Curing values
Potting time (min) 60
Demolding time (min) 24
Full networking (h) 72
Product approvals
Certificates RoHS or REACH
Food contact No
Suitable for medical use 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 datasheets

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