Why choose condensation silicone rubber? Condensation cure silicone, also known as tin cure silicone rubber or RTV silicone , is popular as a silicone casting rubber due to its ease of use and reliable results. These liquid silicone rubber systems are suitable for making silicone molds with a predictable curing...
Silicone Condensation Starter kit 20 is based on our 2-component (poly-condensation) casting silicone suited for soap, candle and concrete moulds etc. These Silicones are ideal for making soap Moulds, Candle Moulds, Concrete moulds etc. This Starter kit includes:P 1 kg...
This silicone has a good fluidity and gives great detail while still remaining strong.The silicone Condensation 20 A + B is a 2-component (poly-condensation curing) castable molding silicone which cures at room temperature. Silicone C 20 -A + B are...
This silicone has a good fluidity and gives great detail while still remaining strong.The silicone Condensation 20 A + B is a 2-component (poly-condensation curing) castable molding silicone which cures at room temperature. Silicone C 20 -A + B are...
This silicone has a good fluidity and gives great detail while still remaining strong.The silicone Condensation 20 A + B is a 2-component (poly-condensation curing) castable molding silicone which cures at room temperature. Silicone C 20 -A + B are...
The silicone condensation DC 3481 with + hardener DC 3081 R is a condensation-crosslinking 2-component casting silicone that hardens at room temperature. The silicone has good fluidity, is suitable for the finest details and is characterized by a very high...
Good liquid (self-deairing) Easy to mix After curing strongly Low shrinkage (<0.3%) Colour White Non-Bleeding Relatively Fast Description The silicone Condensation DC 3481 with the catalyst 3081 F is a professional 2-component (poly-condensation curing) castable molding silicone which cures at room...
This silicone is very suitable as a mold for casting pewter miniatures or for making your own fishing weights and hooks (fishing lure). Color: reddish brown Easy to mix Briefly heat resistant up to 380°C Very hard, Shore (A) 60...
Condensation-curing, castable, 2-component silicone rubber. Main application: Making cost effective molds, especially for casting various casting resins. very good flowability and self-deaeration low Shore A hardness (approx. 25) excellent tear strength high elongation and flexibility outstanding chemical resistance to attack...
Condensation-curing, castable, 2-component silicone rubber. Main application: Making cost effective molds, especially for casting various casting resins very good flowability and self-deaeration Shore A hardness (approx. 37) excellent tear strength high elongation and flexibility outstanding chemical resistance to attack by...
Wacker Elastosil M 1470 is a 2-component condensation-curing kneadable silicone. This silicone cure after kneading the A- and B-component together at room temperature. These silicones are ideal for making moulds of charms and small or flat objects. The result is...
Silicone Thixo C is a thickening agent for all condensation curing silicone. Thixo C allows you to thicken the otherwise fluid silicone. Silicone Thixo C (condensation-curing) is a viscous component that can be added to the pourable condensation curing silicone, to make...
Silicone Condensation Accelerator speeds up the curing process and shortens the demoulding time. This 1 component of whitish emulsion is added to the A component of condensation silicone to shorten the processing time and demal time of silicone. The operation...
This hardener works on all condensation silicones. This hardener is extremely fast. If you want to work very quickly, we recommend using this special B component: Wacker T47 (1-2%). This B component may also be mixed with other condensation B...
This hardener works on all condensation silicones. This T51 hardener from Wacker makes the silicone more resistant to polyester. This B component may also be mixed with other condensation B components to achieve a speed of your choice with the...
These silicones have good fluidity, provide a lot of detail and have a high tensile strength and are soft. The silicone Condensation 5 is a 2-component cast silicone that cures at room temperature. Excellent for casting molds for fragile objects...
These silicones have good fluidity, provide a lot of detail and have a high tensile strength and are soft. The silicone Condensation 35 is a 2-component cast silicone that hardens at room temperature. Excellent for casting molds for detailed and...
This hardener works on all condensation silicones. This T21 hardener from Wacker makes the silicone more resistant to polyurethane and epoxy. This B component may also be mixed with other condensation B components to achieve a speed of your choice...
The Wacker Elastosil RT 480 is a spreadable 2-component condensation silicone, which cures at room temperature, with a higher hardness. These silicones are ideal for making molds via a lubrication process and for making seals that need to be made...
This hardener works on all condensation silicones. This T37 hardener from Wacker makes the silicone more resistant to polyurethane and epoxy. This B component may also be mixed with other condensation B components to achieve a speed of your choice...
ELASTOSIL® RT 402, Room Temperature Curing Silicone Rubber (RTV-2) ELASTOSIL® RT 402 is a pourable, condensation-curing, two-componentsilicone rubber that vulcanizes at room temperature.Main application: Making pads for pad printing, antistatic behaviour Properties• Very good flowability and self-deaeration• Very low hardness...
This hardener works on all condensation silicones. This T40 hardener from Wacker, allows the normal condensation silicones to harden a little faster to a generally usable silicone rubber. This T40 can be used with all condensation hardening silicones and is...
This T 40 paste catalyst is primarily intended for the kneadable Wacker Elastosil M 1470. Processing The condensation hardening silicone can be easily mixed by hand. Mix the A and B components carefully and in the specified ratio. T40 mixture...
This hardener works on all condensation silicones and is especially intended for the Wacker M 4503 condensation silicones. The T-35 is easy to mix with the T-47 for shorter curing times. Processing The condensation hardening silicone can be easily mixed...
Condensation-curing, castable, 2-component silicone rubber. Main application: Making cost effective molds, especially for casting various casting resins. very good flowability and self-deaeration low Shore A hardness (approx. 25) excellent tear strength high elongation and flexibility outstanding chemical resistance to attack...
This hardener works on all condensation silicones. For standard use, the condensation B 5% catalyst is recommended. Processing The silicone Condensation 20, you can easily mix by hand or machine. Mix the A and B component carefully and in the...
This silicone has a good fluidity and gives great detail while still remaining strong.The silicone Condensation 20 A + B is a 2-component (poly-condensation curing) castable molding silicone which cures at room temperature. Silicone C 20 -A + B are...
Why choose condensation silicone rubber?
Condensation cure silicone, also known as tin cure silicone rubber or RTV silicone , is popular as a silicone casting rubber due to its ease of use and reliable results.
These liquid silicone rubber systems are suitable for making silicone molds with a predictable curing at room temperature (room temperature vulcanizing silicone).
⚠️ Business only
This tin-curing condensation silicone may only be purchased by registered companies that can safely handle the required B components. Sales to private individuals are not permitted.
Curing mechanism: Curing via a condensation reaction with tin salts, formulations are based on PDMS (polydimethylsiloxane).
For: Professional mold makers, restoration and sculpting studios, prop and SFX workshops, and industrial users who cast with concrete, plaster, wax, soap, or resins.
Key Benefits
✓Easy to pour, brush, inject or knead
✓Durable long life with good resistance to chemicals
✓Detail view captures fine details (note slight shrinkage in the long term)
✓Wide processing margin, room temperature curing
✓Temperature resistant after curing typically from −20°C to +180°C
Application methods
→Castable silicone for high detail reproduction and complex shapes
→Brushable silicone with thixotropic agent for vertical surfaces
→Kneadable silicone for quick block molds and repairs
Processing & curing
Ideal conditions
Temperature: Operate at 15 to 30°C with a relative humidity above 30 percent.
Warning: At temperatures above 60°C the silicone may no longer cure properly.
Curing at room temperature
Adaptable with thixotropic agent and accelerator
Suitable for small and large projects
Modifiers
Silicone Condensation Thixo C makes the mixture thixotropic for brushable layers.
Silicone Condensation Accelerator shortens curing and disassembly time.
B components T21, T37, T47, T51
Speed and hardness per product agreement
Compatibility with resins and casting materials
Important: Not all condensation silicones are suitable for epoxy, clear PU or polyester.
For these applications, choose the qualities developed for this purpose, such as:
Silicone Condensation DC 3481 R
Silicone Condensation 20 for PU and Epoxy
Always check the product page for compatibility and the correct release agent.
Tips for the best results
Mixing & Processing
→ Weigh accurately by weight and mix thoroughly
→ Scrape the bottom and sides of the mixing bowl
→ Deaerate under vacuum or pour in a thin stream
Mold Making Techniques
→ See porous models in advance
→ Use a suitable release agent with resins
→ Build brush molds in multiple thin layers
Storage & Shelf Life
→ Store components in a cool, dry place
→ Close packaging immediately after use
→ Respect pot life and disassembly time
Frequently Asked Questions (FAQ)
What is the difference between condensation and addition silicones?
Condensation silicones use tin catalysts, are often more affordable, and may shrink slightly over time. Platinum-cured silicones generally have lower shrinkage and other risks of inhibition.
Can I use condensation silicone with epoxy, PU or polyester?
Yes, but use specific qualities designed for this, for example DC 3481 R, DC 3481 Fast or Condensation 20 for PU and Epoxy.
What are the ideal curing conditions?
Work at 15 to 30°C with humidity above 30 percent. Avoid curing above 60°C, as this can cause the reaction to fail.
How do I make a brushable silicone?
Add Silicone Condensation Thixo C to a compatible base to create a non-sag mixture. Apply multiple thin coats for a strong result.
Do not confuse
RTV sealant and silicone spray rubbers for cars are different products than silicone casting rubber .
RTV sealant is a one component sealant
Silicone spray is a lubricant for rubbers in the car
These do not belong to our two-component liquid silicone rubber for molds.
Getting Started
Order condensation-grade silicone mold rubber, compare options for PU, epoxy, and polyester. Download datasheets and contact us for practical advice and fast delivery in Europe.
