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BLUESIL RTV 3535 PB

BLUESIL RTV 3535 PB

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Kneadable 2K silicone putty for very fast impressions and model fixations — mixing ratio 1:1.

Kneadable 2K silicone putty (paste, 1:1, Pt) for very fast impressions and model fixations — cures in 5 minutes without potting

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  • Manufacturer
  • Networking type
  • Container
  • Number of components
  • consistency
  • Mixing ratio
  • UV resistance
  • Paint has hardened
  • Self-leveling
  • Electrical insulation
  • Potting time (min)
  • Demolding time (min)
  • Food contact
  • Suitable for medical use
  • Tensile strength (MPa)
  • Elongation at break (%)
  • Tensile strength (N/mm)

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Blue mold making silicone BLUESIL 2K silicone ELKEM Swiss bearing RTV Addition Platinum catalyst Mixing indicator Prototyping RTV 3535 P Paste silicone fast printing 5 min 1:1

 
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: 40-917B

HS code: 39100000

Internal reference: 40-917B
HS code: 39100000

BLUESIL RTV 3535 PB
BLUESIL RTV 3535 PB
Bluesil Elkem Silicones SKU 40-917B​

Bluesil RTV 3535 PA & B is a kneadable 2K silicone putty (paste, 1:1, Pt) for very fast impressions and model fixations — cross-links in 5 minutes without potting.

This product line comprises kneadable 2K silicone pastes (1:1, Pt) for very fast impressions — no potting, no vacuum degassing, cures in 5 minutes. RTV 3535 P is tailored to specific industrial applications — the most important properties and areas of application are listed below.

1:1 Putty — networked in 5 minutes

Bluesil RTV 3535 P is a kneadable silicone paste — mix 1:1 by hand, press into the mold, and demold after 5 minutes. Ideal for very quick impressions without pouring or vacuum degassing.

RTV 3535 P in figures
Putty 1:1
paste
5 min
Curing
Shore A 32–34
hardness
<0.1 %
Shrinkage

What distinguishes the RTV 3535 P

1:1 mixing ratio
Simplest dosage — knead together equal amounts of white and blue.
Very fast network connection (5 min)
High-throughput impressions without waiting time.
Kneadable paste
Press directly onto the original — no pouring or vacuum required.
Very low shrinkage
<0.1 % — dimensionally accurate impressions.
Natural adhesion
Binds to many substrates without an additional primer.
Good print quality
Reproduces details similar to a casting mold — quickly and easily.

What is the RTV 3535 P used for?

Quick prints
Instant molding without casting — prototype iterations.
Model fixation
Holding and support molds for model parts in the workshop.
Mold repair
Local shape repair and adjustment with kneadable paste.
Rapid prototyping
Iterative model building in design development.
Applications for artists and restoration
Impressions of small reliefs in sculpture and restoration.
Workshop aids
Universal, fast form for ad-hoc applications.
Data sheets & safety data sheet
Full TDS and SDS in DE, EN, FR — view or download directly.
To the documents →

processing

1
Prepare model
Clean, grease-free, dry.
2
Mix 1:1 by hand
Knead equal amounts of white and blue together evenly to form a uniform color — no more streaks.
3
Press into the mold
Apply even pressure to the model within the processing time (2-3 min) — no contact points.
4
Curing
5 minutes at 23 °C — fastest RTV networking.
5
Demolding + Applying
Carefully demold after curing. Wait 1 hour for full final properties before use.

Recommended accessories

Bluesil Primer 131
Universal adhesion promoter for stainless steel, aluminum, PMMA and many metals.
View product →
Bluesil Fluid 47 V 50
PDMS thinner / plasticizer for Bluesil RTV systems.
View product →

Important instructions

Mixing & Dosage
Stir A and B thoroughly before each use. Use precise dosage in the specified ratio (see table above) — ideally by weight. Incorrect dosage will result in incomplete cross-linking.
Degassing
Degas the mixture under a vacuum of 30–50 mbar. The material expands 3–4 times, then contracts back to its original size after 5–10 minutes. Interrupt the vacuum several times for better degassing.
Avoid inhibitors
Polyaddition silicones are inhibited by: sulfur-vulcanized rubber, tin-catalyzed RTV, amine epoxides, and PVC with tin salts. If in doubt, conduct a preliminary test.
Application advice
SILITECH will advise you on the optimal RTV variant for your application — substrate, hardness, pot life, mechanics. Contact us with your specific application details.

RTV 3535 P compared to related RTV products

Networking system, mechanics, and processing times side by side — all values ​​from the official Elkem TDS. “— " = not specified in the datasheet.

RTV 3535 P
Current product		 RTV 3410 QC →RTV 3428 →RTV 3430 SB →
Networking system2K Polyaddition (Pt) Putty2K Polyaddition (Pt)2K Polyaddition (Pt)2K Polyaddition (Pt)
Mixing ratio1 : 110 : 110 : 110 : 1
ColorWhite / blue (B)Transparent / blue (B)Transparent / pink / whiteTransparent / grey (B)
Shore A hardnessA 32–34A 10A 28A 28
Elongation at break150 %200 %600 %600 %
Tensile strength0.8 MPa2 MPa7.5 MPa6 MPa
Tear resistance5 kN/m4 kN/m20 kN/m20 kN/m
Potting time2–3 min10 min1 h1 h
demolding time5 min30–40 min16 h10 h
Mixed viscositypaste10,000 mPa·s≈25,000 mPa·s20,000 mPa·s
Main applicationQuick printsLong-life formsComplex shapes with undercutsConcrete components (construction)
Topics & Application Areas
Key terms related to this product. Also useful for our search and filters.
Blue mold making silicone BLUESIL 2K silicone ELKEM Swiss bearing RTV Addition Platinum catalyst Mixing indicator Prototyping RTV 3535 P Paste silicone fast printing 5 min 1:1

Technical data for BLUESIL RTV 3535 PB

All 18 product information 7 Further properties 1 Physical properties 2 Electrical properties 1 Curing values ​​2 Product approvals 2 Mechanical properties 3
Product information
brand Bluesil
Manufacturer Elkem Silicones
Networking type Addition (Platinum)
Container 1 kg, 25 kg
Number of components 2K (two-component)
consistency Thixotropic
Mixing ratio 1:1
Other features
UV resistance No
Physical properties
Paint has hardened Blue
Self-leveling No
Electrical properties
Electrical insulation No
Curing values
Potting time (min) 2
Demolding time (min) 5
Product approvals
Food contact No
Suitable for medical use No
Mechanical properties
Tensile strength (MPa) 0.8
Elongation at break (%) 150
Tensile strength (N/mm) 5

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
Bluesil RTV 3535 PB - Technical Data Sheet DE.pdf
152 KB
Bluesil RTV 3535 PB - Technical Data Sheet EN.pdf
448 KB
Bluesil RTV 3535 PB - Fiche Technique FR.pdf
175 KB
Safety Data Sheets (SDS) 3
Bluesil RTV 3535 PB - Safety Data Sheet DE.pdf
298 KB
Bluesil RTV 3535 PB - Fiche de Sécurité FR.pdf
499 KB
Bluesil RTV 3535 PB - Scheda di Sicurezza IT.pdf
492 KB

Frequently asked questions about RTV 3535 P

Practical questions regarding processing and design — answered by SILITECH.

Bluesil RTV 3535 PA & B: Kneadable 2-component silicone putty (paste, 1:1, Pt) for very fast impressions and model fixations — cures in 5 minutes without potting. Main applications are fast impressions, model fixation, and mold repair.

Polyaddition crosslinking is a two-component silicone chemistry using a platinum catalyst. Component A contains the platinum complex, and component B contains the SiH crosslinker. When mixed, the components crosslink without releasing reaction byproducts—no shrinkage due to outgassing, excellent dimensional accuracy, and low linear shrinkage. Important: Polyaddition silicones are inhibited by various substances—sulfur-vulcanized natural rubbers, tin-catalyzed RTV silicones, amine-catalyzed epoxy resins, and tin-stabilized PVC. In case of doubt, a preliminary test should be carried out.

Thoroughly stir components A and B before each processing step. Measure precisely according to the mixing ratio specified in the TDS (see comparison table above) – ideally by weight. Mix with an electric or pneumatic agitator at low speed (minimize air entrainment). Degas the mixture under vacuum (30–50 mbar) – the material will expand 3–4 times its original volume, bubbles will escape, and the material will settle back after 5–10 minutes. Then slowly pour into the mold from the lowest point to avoid air entrapment. For polyaddition systems, avoid contact with inhibitors (sulfur-based rubber, tin-based RTV, amine epoxides, PVC with tin salts).

Store in the unopened original container in a dry, cool place — typically between +5 and +30 °C, see TDS for exact values. Store components A and B separately; seal airtight after opening. Polyaddition systems are insensitive to moisture, but should be stored in a cool place to maintain pot life. Consult the Safety Data Sheet (SDS) before use.

The comparison table above lists related RTV products with different hardnesses, pot lives, or application profiles. If you are unsure which product is best for you, we would be happy to advise you — contact SILITECH with details of your application (substrate, desired hardness, processing time, mechanical requirements, and durability).

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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 1 kg or 25 kg
brand Bluesil
Manufacturer Elkem Silicones
Networking type Addition (Platinum)
Number of components 2K (two-component)
consistency Thixotropic
Mixing ratio 1:1
Other features
UV resistance No
Physical properties
Paint has hardened Blue
Self-leveling No
Electrical properties
Electrical insulation No
Curing values
Potting time (min) 2
Demolding time (min) 5
Product approvals
Food contact No
Suitable for medical use No
Mechanical properties
Tensile strength (MPa) 0.8
Elongation at break (%) 150
Tensile strength (N/mm) 5
Keywords
Keywords
Blue mold making silicone BLUESIL 2K silicone ELKEM Swiss bearing RTV Addition Platinum catalyst Mixing indicator Prototyping RTV 3535 P Paste silicone fast printing 5 min 1:1
Mechanical properties
Linear shrinkage< 0.1 %
processing
Pot life at 23°C3.0 min
demolding time8.0 min
Physical & Thermal
Density (23°C)1.55 g/cm³
Temperature resistance (duration)-50 to 200 °C
Peak temperature (short-term)200 °C
storage
Shelf life in original packaging12 months
Storage temperature-5 to 30 °C

Documents and datasheets

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