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BLUESIL Catalyseur SPU

BLUESIL Catalyseur SPU

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Special sn catalyst for the Bluesil RTV 3318/3330/3335 SPU series — mixing ratio 100:5.

Special sn catalyst for the Bluesil RTV 3318/3330/3335 SPU series — specifically for polyurethane casting resin mold reproduction with 24 h demolding

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  • Mixing ratio
  • Networking type
  • Container
  • Number of components
  • consistency
  • Mixing ratio
  • UV resistance
  • Paint has hardened
  • Self-leveling
  • Electrical insulation
  • Food contact
  • Suitable for medical use

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Tin silicone BLUESIL ELKEM Swiss bearing catalyst condensation SPU PU-resistant

 
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

Internal reference: 40-969

HS code: 39100000

Internal reference: 40-969
HS code: 39100000

BLUESIL Catalyseur SPU
BLUESIL Catalyseur SPU
Bluesil · Elkem Silicones · SKU 40-969

Bluesil Catalyseur SPU is a special Sn catalyst for the Bluesil RTV 3318/3330/3335 SPU series — specifically for polyurethane casting resin mold reproduction with 24 h demolding.

Bluesil catalysts for crosslinking the Bluesil RTV series — tailored to the pot life, demolding time, and curing kinetics of the respective RTV family. CATA SPU is tailored to specific applications — the most important properties and areas of application can be found below.

Special for PU casting resin molds

Bluesil CATA SPU is the special catalyst for the SPU series (RTV 3318/3330/3335 SPU) — tailored to the requirements of polyurethane casting resin mold reproduction. Pot life 150 min, demolding after 24 h, three hardness levels available (18/30/35 Shore A).

CATA SPU in figures
SPU series
PU mold
150 min
Potting time
24 h
demolding time
Light yellow
Color

What distinguishes CATA SPU

Specifically for the SPU series
Optimally matched to RTV 3318/3330/3335 SPU.
PU-resistant crosslinking
Excellent resistance to exothermically cross-linking PU resins.
Three hardness options
With 3318 SPU (18 Shore A) / 3330 SPU (30) / 3335 SPU (35).
5% dosage
5 parts based on 100 parts RTV-SPU.
Standard workflow (24 h)
Proven standard demolding workflow.

What is CATA SPU used for?

PU casting resin molds
Main application with RTV 3318/3330/3335 SPU.
Industrial PU reproduction
Multiple molds for PU components.
Wax reproduction
Also for other replication materials.
Furniture and decorative components
PU components in the furniture industry.
Art and souvenir PU
Multiple PU reproduction in small series.
Data sheets & safety data sheet
TDS and SDS in multiple languages ​​— watch or download directly.
To the documents →

processing

1
Stir up the RTV base
Homogenize the RTV base before adding the catalyst — avoid sedimentation of the fillers.
2
Dosing catalyst
Precise dosage: typically 5% w/w (see TDS for exact value). Dose by weight — volumetric dosing is inaccurate.
3
Mix carefully
Low-speed agitator — until no streak is visible (homogeneous color).
4
Degas
30–50 mbar vacuum for bubble-free crosslinking.
5
Process
Pour, smooth, or apply within the pot life — pot life depends on the catalyst and temperature.

Recommended accessories

Bluesil Additive PC Thixo
Thixotropy additive for Bluesil RTV 3325 (polycondensation) — vertical application.
View product →
Bluesil Diluant 2030
Low viscosity thinner for Bluesil RTV mixture viscosity adjustment.
View product →
Bluesil Inhibitor 3
Pot life extender for polyaddition silicone systems (Pt-Cure).
View product →

CATA SPU in comparison

Direct comparison with related catalyst products in our range. “— " = not specified in the data sheet.

CATA SPU
Current product		 CATA 24 H →CATA 6 H →CATA Hi-Pro Green →
Catalyst typeSpecial sn catalyst (PU)tin catalystTin catalyst (Quick)Organotin carboxylate
ColorLight yellowColorlessColorlessGreen
Compatible RTVRTV 3318/3330/3335 SPURTV 3221/3318/3325/3450RTV 3221/3318/3325/3450V-1060/V-1080 series
Mixing ratio100 : 5100 : 5100 : 510 : 1
Potting time150 min90–150 min20–60 min3 h
demolding time24 h24 h6 h16 h
Topics & Application Areas
Key terms related to this product. Also useful for our search and filters.
Tin silicone BLUESIL ELKEM Swiss bearing catalyst condensation SPU PU-resistant

Technical data for BLUESIL Catalyseur SPU

All 14 product details 8 Further properties 1 Physical properties 2 Electrical properties 1 Product approvals 2
Product information
brand Bluesil
Manufacturer Elkem Silicones
Mixing ratio 100:5
Networking type Condensation (tin)
Container 100 g, 1 kg
Number of components 1K (single-component)
consistency Flowable
Mixing ratio Single-component
Other features
UV resistance No
Physical properties
Paint has hardened Transparent
Self-leveling Yes
Electrical properties
Electrical insulation No
Product approvals
Food contact No
Suitable for medical use No

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) 2
Bluesil CATA SPU - Technical Data Sheet EN.pdf
170 KB
Bluesil CATA SPU - Fiche Technique FR.pdf
180 KB

Frequently asked questions about CATA SPU

Practical application and design questions — answered by SILITECH.

Bluesil Catalyseur SPU: Special tin catalyst for the Bluesil RTV 3318/3330/3335 SPU series — specifically for polyurethane casting resin mold reproduction with 24-hour demolding time. Main applications: PU casting resin molds, industrial PU reproduction, wax reproduction.

The standard dosage is 5 parts catalyst to 100 parts RTV base (5% w/w). The exact dosage affects the pot life and demolding time—see TDS for precise values. Important: too little catalyst leads to incomplete crosslinking; too much catalyst dramatically reduces the pot life and can impair the final properties. Stir both components thoroughly before mixing.

Store in the unopened original container in a dry, cool place — typically between +5 and +30 °C, see TDS for exact values. Consult the Safety Data Sheet (SDS) before use. Observe the expiry date on the packaging — Elkem guarantees the product's specifications only until the date shown.

The comparison table above lists related products with similar functions or specifications. If you are unsure which product is best, we would be happy to advise you — contact SILITECH with details of your application (desired properties, substrate, processing workflow).

Your question isn't listed here

Our technical team will advise you personally on material selection, processing questions, and individual requirements. Quickly and competently.

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Product specifications

Product information
Container 100 g or 1 kg
brand Bluesil
Manufacturer Elkem Silicones
Mixing ratio 100:5
Networking type Condensation (tin)
Number of components 1K (single-component)
consistency Flowable
Mixing ratio Single-component
Other features
UV resistance No
Physical properties
Paint has hardened Transparent
Self-leveling Yes
Electrical properties
Electrical insulation No
Product approvals
Food contact No
Suitable for medical use No
Keywords
Keywords
Tin silicone BLUESIL ELKEM Swiss bearing catalyst condensation SPU PU-resistant
storage
Shelf life in original packaging12 months
Storage temperature5 to 30 °C

Documents and datasheets

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