SILISIL RTV PC-Putty 30 Slow CATALYST

SILISIL · SKU 90-0907.PC.ML040

SILISIL RTV PC-Putty 30 Slow CATALYST is a room temperature vulcanizing 2-component silicone of the PC — Polycondensation- series (Polycondensation (tin catalyst), Slow, RTV-2) — Slow catalyst for PC-Putty 30 BASE — Pot life 90 min for complex assemblies.

The mixture is prepared in a 1:1 ratio by weight . Pot life at 23 °C is approximately 90 minutes, demolding is possible after approximately 18–22 hours, and complete curing takes 24 hours. Temperature resistant from -40 °C to +200 °C.

Key property

Slow-setting catalyst for SILISIL PC-Putty 30 BASE — pot life 90 minutes for complex multi-part assemblies and detailed hand processing. Light yellow in color.

SILISIL RTV PC-Putty 30 Slow CATALYST in figures

A 30

Shore Hardness

modeling clay

Consistency

90 min

Pot life @23 °C

200 %

Elongation at break

What distinguishes SILISIL RTV PC-Putty 30 Slow CATALYST

Pot time 90 minutes — relaxed processing

Very short processing time — suitable for high-throughput production with short mold cycles.

Polycondensation — resistant to inhibitors

The condensation system does not react to sulfur, amine and PVC inhibitors — certainly not even to problematic originals.

Light yellow — visible mixing control with BASE

Light yellow mixing control — color change indicates complete mixing with BASE component.

Elongation at break 200% for Shore A 30

Solid elongation at break — suitable for moderate undercuts with higher form stiffness.

Mixing ratio 1:1 with BASE

Simple 1:1 ratio with BASE component — no scale needed, volume mixing possible.

Dimensional change <0.57%

Minimal dimensional change — precise reproduction even after several days of storage.

What is SILISIL RTV PC-Putty 30 Slow CATALYST used for?

Complex multi-part molds

Building up multiple layers and partial shapes on top of each other — the long pot life allows for clean handwork.

Large-area direct impressions

Molding reliefs, sculptures and large models — no rush, clean result.

Detailed corrections to the model

90 minutes for precise modeling and correction work on the still malleable putty.

Training and teaching applications

Suitable for workshops — enough time for explanations, demonstrations and corrections during processing.

Jewelry and artist studios

Direct impression taking with time for several detail stages and modeling work.

First-time users and hobbyists

Ideal for beginners — more time to practice, no stress from too short a pot life.

Processing

Prepare the original

Clean, dry, and dust-free surface at 23 °C — cooler environments significantly extend pot life and curing time.

Mix components

Stir base and catalyst thoroughly before use. Weigh out 1:1 by weight. Mix in thoroughly, including container walls and bottom.

Use without venting

Polycondensation does not require a vacuum — pour or apply directly.

Processing

Pour in a thin stream from a height of approximately 30 cm — minimizing air bubbles. For modeling clay, press directly onto the model.

Vulcanize and demold

At 23 °C, demolding is possible after approximately 18–22 hours, with complete hardening after 24 hours.

Data Sheets & Safety Data Sheet

Complete TDS and SDS in DE, EN, FR — view or download directly.

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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

500 g, 1 kg, 5 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 RTV PC-Putty 30 BASE

Base component — is processed with Fast or Slow CATALYST in a 1:1 ratio to form a putty-like clay.

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SILISIL RTV PC Putty 30 Fast CATALYST

Rapid catalyst (pot life 2 min, setting time 15 min) — combined with BASE for urgent direct impressions.

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SILISIL Silicone Remover

Cleaning agent for silicone residues on tools, models, and work surfaces — gentle and effective.

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Which silicone for which application?

SILISIL RTV PC-Putty 30 Slow CATALYST in direct comparison with related products in our range (PC — Polycondensation).

	PC-Putty 30 Slow Catalyst Current Product	PC-Putty 30 BASE →	PC-Putty 30 Fast Catalyst →	PC-Dura 30 →
Shore hardness A	30	30	28	30
Mixed viscosity	(Play-Doh)	(Play-Doh)	(Play-Doh)	60'000
Color	Light Yellow	Light Yellow	Light Red	White
Pot life @23 °C	90	2 (Fast) / 90 (Slow)	2	60
Mixing ratio	1:1	1:1	1:1	100:5

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 30 Swiss Brand 2K Platinum Cast Putty / Kneadable LED / Optoelectronics Range Review 2026 Price List Missing

Technical specifications for SILISIL RTV PC-Putty 30 Slow CATALYST

All 13 product information 3 Physical properties 2 Electrical properties 1 Product approvals 3 Mechanical properties 4

Product Information
Curing type	Addition (Platinum)
Container	40 ml
Brand	SILISIL

Physical Properties
Cured Color	Light Yellow
Self-leveling	Thixotropic

Electrical Properties
Electrical Insulation	Yes

Product Approvals
Food contact	No
Medical grade	No
Certificates	RoHS, REACH

Mechanical properties
Shore hardness A (cured)	A 30
Tensile strength (MPa)	0.9
Elongation at break (%)	200
Tear strength (N/mm)	3.6

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-Putty 30 Slow CATALYST - Technical Data Sheet DE.pdf

148 KB

SILISIL RTV PC-Putty 30 Slow CATALYST - Technical Data Sheet EN.pdf

151 KB

SILISIL RTV PC-Putty 30 Slow CATALYST - Fiche Technique FR.pdf

154 KB

Frequently asked questions about SILISIL RTV PC-Putty 30 Slow CATALYST

Practical application and design questions — answered by SILITECH.

What is PC-Putty 30 Slow Catalyst suitable for?

SILISIL RTV PC-Putty 30 Slow CATALYST is a 2K silicone from the PC polycondensation series (Shore A 30, light yellow). It is a slow catalyst for PC-Putty 30 BASE, with a pot life of 90 minutes, suitable for complex assemblies, multi-part molds, and related applications.

What are the pot life and demolding time of PC-Putty 30 Slow CATALYST?

At 23 °C, the pot life is approximately 90 minutes and the demolding time approximately 18–22 hours. Complete curing occurs after 24 hours.

What type of network is PC-Putty 30 Slow CATALYST?

SILISIL RTV PC-Putty 30 Slow CATALYST is a polycondensation (tin catalyst), slow-action system. Polycondensation system (tin catalyst) — no susceptibility to poisoning from sulfur, amines, or PVC. Vacuum venting is not mandatory.

What mixing ratio is used for PC-Putty 30 Slow CATALYST?

SILISIL RTV PC-Putty 30 Slow CATALYST is mixed in a 1:1 ratio by weight (base to catalyst). Homogenize both components separately before mixing, then thoroughly incorporate them – including the container walls and bottom.

What are the Shore hardness and mechanical properties of PC-Putty 30 Slow CATALYST?

SILISIL RTV PC-Putty 30 Slow CATALYST achieves a Shore A hardness of 30 (ASTM D 2240), a tensile strength of 0.9 N/mm² (ASTM D 412), an elongation at break of approximately 200% and a tensile strength of 3.3 N/mm (ASTM D 624).

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Product Specifications

Product Information
Curing type	Addition (Platinum)
Container	40 ml
Brand	SILISIL

Physical Properties
Cured Color	Light Yellow
Self-leveling	Thixotropic

Electrical Properties
Electrical Insulation	Yes

Product Approvals
Certificates	RoHS or REACH
Food contact	No
Medical grade	No

Mechanical properties
Shore hardness A (cured)	A 30
Tensile strength (MPa)	0.9
Elongation at break (%)	200
Tear strength (N/mm)	3.6

Keywords
Keywords	SILISIL Silicone RTV-2 Swiss Bearing Addition Platinum Electronic Encapsulation Shore A 30 Swiss Brand 2K Platinum Cast Putty / Kneadable LED / Optoelectronics

Documents and data sheets

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

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SILISIL RTV PC-Putty 30 Slow CATALYST

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Documents

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Product data

What distinguishes SILISIL RTV PC-Putty 30 Slow CATALYST

What is SILISIL RTV PC-Putty 30 Slow CATALYST used for?

Processing

Important Notes

Recommended accessories

Which silicone for which application?

Technical specifications for SILISIL RTV PC-Putty 30 Slow CATALYST

Documents and data sheets

Technical Data Sheets (TDS) 3

Frequently asked questions about SILISIL RTV PC-Putty 30 Slow CATALYST

Your question not covered?

Product Specifications

Documents and data sheets