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BLUESIL RTV 3450 B transparent (100 g)

BLUESIL RTV 3450 B transparent (100 g)

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2K-Pt silicone with Shore A 50.

2K-Pt silicone with Shore A 50 — highest hardness of the RTV-3440/3450 family for demanding tool shapes with Quick-Cure variant

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  • consistency
  • Mixing ratio
  • UV resistance
  • Paint has hardened
  • Self-leveling
  • Electrical insulation
  • Food contact
  • Suitable for medical use

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Transparent mold making silicone BLUESIL 2K silicone ELKEM Swiss bearing RTV Addition Platinum optical clarity catalyst prototyping series mold RTV 3450 Shore A 50 hardness test robust 100 g

 
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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: 40-2304.DO.G100

HS code: 39100000

Internal reference: 40-2304.DO.G100
HS code: 39100000

BLUESIL RTV 3450 B transparent (100 g)
BLUESIL RTV 3450 B transparent (100 g)
Bluesil · Elkem Silicones · SKU 40-2304.DO.G100

Bluesil RTV 3450 A & B is a 2K-Pt silicone with Shore A 50 — the highest hardness of the RTV-3440/3450 family for demanding tool shapes with a quick-cure variant.

This product line comprises 2K polyaddition silicone elastomers (platinum-catalyzed) for mold making — without reaction byproducts, offering excellent detail reproduction and reusability. RTV 3450 is tailored to specific industrial applications — the most important properties and areas of application are listed below.

Highest hardness (Shore A 50) + QC variant

Bluesil RTV 3450 is the hardest variant of the RTV-3440/3450 family. The QC (Quick Cure) variant reduces demolding time from 16 to 4 hours — ideal for high-volume production.

RTV 3450 in figures
Shore A 50
highest hardness
5 MPa
Tensile strength
300 %
Elongation at break
8 N/mm
Tear resistance

What makes the RTV 3450 stand out

Maximum hardness (Shore A 50)
Very stable shape for industrial tool applications.
Quick-Cure variant (RTV 3450 QC)
Demolding after 4 hours instead of 16 hours — high-throughput production.
Excellent attention to detail
It also reproduces complex 3D objects with good rendering.
Multiple colors (B component)
Available in black and translucent — to suit the application.
Chemical and temperature resistant
Resistant to many casting materials.
Standard and QC variants can be combined
Workflow optimization through the selection of the appropriate option.

What is the RTV 3450 used for?

High-stress tool molds
Industrial prototypes with high stability.
Low-melting metals
Zinc, tin and low-melting alloy casting.
Polyester composite components
Reproduction of polyester workpieces.
Wax reproduction
Tool for multiple wax moldings.
High-throughput production (QC)
Quick-cure variant for efficient production runs.
Industrial end-product reproduction
Precision-cut tool molds for small and medium production runs.
Data sheets & safety data sheet
Full TDS and SDS in DE, EN, FR — view or download directly.
To the documents →

processing

1
Stir A and B separately
Stir both components thoroughly before each processing step — avoid sedimentation.
2
Mix in the correct proportions
Dose by weight (see comparison table: 10:1 or 1:1). Homogenize thoroughly with a low-speed mixer.
3
Degas in a vacuum
30–50 mbar vacuum — material expands 3–4 times, bubbles escape, collapses after 5–10 min. Interrupt the vacuum several times for better degassing.
4
Pour slowly
Pour slowly from the lowest point of the mold – this prevents air entrapment. Avoid inhibitors when using polyaddition (sulfur rubber, Sn-RTV, amine epoxides, PVC).
5
Allow to harden
Demoldable at 23 °C after demolding time (see TDS). Heat accelerates demolding — at higher temperatures the dimensions may change.
6
demolding
Carefully remove from the mold, separating the mold halves if necessary. Clean the mold before recasting — release agents are usually not required.

Recommended accessories

Bluesil Inhibitor 3
Pot life extender for polyaddition silicone systems (Pt-Cure).
View product →
Bluesil Fluid 47 V 50
PDMS thinner / plasticizer for Bluesil RTV systems.
View product →
Bluesil ADD 11013
Thixotropy additive for Bluesil RTV 3428 (polyaddition) — vertical application.
View product →
Bluesil Primer 131
Universal adhesion promoter for stainless steel, aluminum, PMMA and many metals.
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 3450 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 3450
Current product		 RTV 3440 →RTV 3445 →RTV 3428 →
Networking system2K Polyaddition (Pt)2K Polyaddition (Pt)2K Polyaddition (Pt)2K Polyaddition (Pt)
Mixing ratio10 : 110 : 110 : 110 : 1
ColorBeige / black / translucentBeige / blue (B)Beige / blue (B)Transparent / pink / white
Shore A hardnessA 50A 40A 45A 28
Elongation at break300 %300 %300 %600 %
Tensile strength5 MPa4 MPa5 MPa7.5 MPa
Tear resistance8 N/mm9 N/mm15 kN/m20 kN/m
Potting time90 min90 min1 h1 h
demolding time16 h6 h6 h16 h
Mixed viscosity15,000 mPa·s15,000 mPa·s13,000 mPa·s≈25,000 mPa·s
Main applicationHigh-stress tool moldsPlaster reproductionIndustrial prototype toolsComplex shapes with undercuts
Topics & Application Areas
Key terms related to this product. Also useful for our search and filters.
Transparent mold making silicone BLUESIL 2K silicone ELKEM Swiss bearing RTV Addition Platinum optical clarity catalyst prototyping series mold RTV 3450 Shore A 50 hardness test robust 100 g

Technical data for BLUESIL RTV 3450 B transparent (100 g)

All 13 product information 7 Further properties 1 Physical properties 2 Electrical properties 1 Product approvals 2
Product information
brand Bluesil
Manufacturer Elkem Silicones
Networking type Addition (Platinum)
Container 100 g
Number of components 2K (two-component)
consistency Flowable
Mixing ratio 10:1
Other features
UV resistance No
Physical properties
Paint has hardened Beige
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.

No public documents are available.
We will gladly send you the TDS and SDS by email upon request; please submit a request.

Frequently asked questions about RTV 3450

Practical questions regarding processing and design — answered by SILITECH.

Bluesil RTV 3450 A & B: 2K platinum silicone with Shore A 50 — highest hardness of the RTV-3440/3450 family for demanding tool molds with a quick-cure variant. Main applications include highly stressed tool molds, low-melting-point metals, and polyester composite components.

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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Product specifications

Product information
brand Bluesil
Manufacturer Elkem Silicones
Networking type Addition (Platinum)
Container 100 g
Number of components 2K (two-component)
consistency Flowable
Mixing ratio 10:1
Other features
UV resistance No
Physical properties
Paint has hardened Beige
Self-leveling Yes
Electrical properties
Electrical insulation No
Product approvals
Food contact No
Suitable for medical use No
Keywords
Keywords
Transparent mold making silicone BLUESIL 2K silicone ELKEM Swiss bearing RTV Addition Platinum optical clarity catalyst prototyping series mold RTV 3450 Shore A 50 hardness test robust 100 g
Mechanical properties
Linear shrinkage< 0.1 %
processing
Viscosity Comp. B200 mPa·s
Pot life at 23°C90.0 min
demolding time960.0 min
Physical & Thermal
Density (23°C)1.1 g/cm³
Temperature resistance (duration)-55 to 200 °C
Peak temperature (short-term)200 °C
storage
Shelf life in original packaging12 months
Storage temperature-10 to 30 °C