Silicone Rubber

Silicone rubber is a great choice of rubber capable of being used to mould a wide range of materials such as plastics, cements, urethanes and waxes. There are so many types of silicone rubber that it's important to choose the right one for your needs.
Have a look at our article on the differences between the different types of silicones here

Old silicone nameNew Silicone name
RTV101 RTV65
T28RTV128
T20RTV120
Addition Cure 13RTV4420
Addition Cure 33RTV640

Our silicone rubbers differ largely in their flexibility, strength and viscosity, allowing you to choose the best one for your mould. All of our silicone rubber are cold cure rubbers, meaning that they vulcanise at room temperature. These are suitable for working at temperatures between -20ºC and 250ºC, making them ideal for most applications. Our RTV-65 silicone rubber, meanwhile, is a firm rubber able to work up to 316ºC. This added durability allows it to be used with metals such as tin alloys and pewter.

To support our silicone rubber selection we are also proud to provide our customers with a range of fantastic supporting accessories to help you mould your silicone rubber. Some of the accessories you can find in this section include Thixo additive, which can be added to your silicone rubber to thicken it. We also provide a choice of adhesive sealants and release agents.


Tiranti believes that the information given on each product is an accurate description of the typical characteristics and/or uses of the product or products, but it is your responsibility to thoroughly test the product in its specific application to determine performance, efficacy and safety.

Silicone Rubber
Tiranti RTV65 Condensation Cure Silicone kit 1.03kg

Tiranti RTV65 Condensation Cure Silicone kit 1.03kg

Stock Code: 403-820
£30.00 (inc VAT) per EACH
£25.00 (exc VAT)
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RTV120 1.05kg Silicone kit Standard Green Cat Non Export

RTV120 1.05kg Silicone kit Standard Green Cat Non Export

Stock Code: 403-860
£33.00 (inc VAT) per EACH
£27.50 (exc VAT)
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RTV128 Silicon 1.05kg Kit Green Catalyst Regular Set

RTV128 Silicon 1.05kg Kit Green Catalyst Regular Set

Stock Code: 403-869
£34.00 (inc VAT) per EACH
£28.33 (exc VAT)
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Thixo Additive 50g for rtv silicones

Thixo Additive 50g for rtv silicones

Stock Code: 403-888
£2.00 (inc VAT) per each
£1.67 (exc VAT)
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T25 Silicone Rubber+cat 1.05kg Kit

T25 Silicone Rubber+cat 1.05kg Kit

Stock Code: 403-650
£35.00 (inc VAT) per EACH
£29.17 (exc VAT)
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RTV120 Silcone Rubber + Green Standard Cat 5.25kg Kit

RTV120 Silcone Rubber + Green Standard Cat 5.25kg Kit

Stock Code: 403-864
£165.00 (inc VAT) per EACH
£137.50 (exc VAT)
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Formula 5 Release Agent 400ml non export

Formula 5 Release Agent 400ml non export

Stock Code: 403-902
£18.99 (inc VAT) per each
£15.83 (exc VAT)
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RTV115 Silicone 1.05kg Kit Green Catalyst Regular Set

RTV115 Silicone 1.05kg Kit Green Catalyst Regular Set

Stock Code: 403-880
£32.00 (inc VAT) per EACH
£26.67 (exc VAT)
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RTV-65 Condensation Cure Silicon kit non export 5.15kg

RTV-65 Condensation Cure Silicon kit non export 5.15kg

Stock Code: 403-840
£149.00 (inc VAT) per EACH
£124.17 (exc VAT)
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Clear Catalyst 50g for RTV120 RTV128 & RTV115

Clear Catalyst 50g for RTV120 RTV128 & RTV115

Stock Code: 403-917
£2.99 (inc VAT) per EACH
£2.49 (exc VAT)
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RTV128 Silicone + Standard CAT 5.25kg Kit

RTV128 Silicone + Standard CAT 5.25kg Kit

Stock Code: 403-873
£165.00 (inc VAT) per EACH
£137.50 (exc VAT)
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Red Fast Cat 250g for RTV120 and RTV128

Red Fast Cat 250g for RTV120 and RTV128

Stock Code: 403-916
£9.99 (inc VAT) per EACH
£8.33 (exc VAT)
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Thixo Additive 500g for rtv silicones

Thixo Additive 500g for rtv silicones

Stock Code: 403-892
£16.99 (inc VAT) per each
£14.16 (exc VAT)
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Clear Catalyst 250g for RTV120 RTV128 & RTV115

Clear Catalyst 250g for RTV120 RTV128 & RTV115

Stock Code: 403-918
£9.99 (inc VAT) per EACH
£8.33 (exc VAT)
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RTV640 Addition Cure Silicone Rubber - 1kg Kit

RTV640 Addition Cure Silicone Rubber - 1kg Kit

Stock Code: 403-640
£40.00 (inc VAT) per EACH
£33.33 (exc VAT)
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RTV128 21kg Kit inc standard green cat. Non Export

RTV128 21kg Kit inc standard green cat. Non Export

Stock Code: 403-876
£795.00 (inc VAT) per EACH
£662.50 (exc VAT)
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Catalyst for T25 Silicone 50g

Catalyst for T25 Silicone 50g

Stock Code: 403-809
£8.99 (inc VAT) per each
£7.49 (exc VAT)
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Putty Silicone + Catalyst 1.0kg kit

Putty Silicone + Catalyst 1.0kg kit

Stock Code: 403-240
£70.00 (inc VAT) per EACH
£58.33 (exc VAT)
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RTV115 Silicone + Standard CAT 5.25kg Kit

RTV115 Silicone + Standard CAT 5.25kg Kit

Stock Code: 403-885
£155.00 (inc VAT) per EACH
£129.17 (exc VAT)
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CA65 Catalyst for RTV65 Silicone 30g

CA65 Catalyst for RTV65 Silicone 30g

Stock Code: 403-812
£4.50 (inc VAT) per each
£3.75 (exc VAT)
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RTV4420 Platinum Cure Silicone Rubber - 1kg Kit

RTV4420 Platinum Cure Silicone Rubber - 1kg Kit

Stock Code: 403-415
£40.00 (inc VAT) per EACH
£33.33 (exc VAT)
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Fast Cat Red 50g for RTV120 and RTV128

Fast Cat Red 50g for RTV120 and RTV128

Stock Code: 403-915
£2.99 (inc VAT) per EACH
£2.49 (exc VAT)
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CA65 Catalyst for RTV65 Silicone 150g

CA65 Catalyst for RTV65 Silicone 150g

Stock Code: 403-811
£6.99 (inc VAT) per each
£5.83 (exc VAT)
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Addition Cure Thixo Agent 250g

Addition Cure Thixo Agent 250g

Stock Code: 403-741
£36.06 (inc VAT) per EACH
£30.05 (exc VAT)
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