In Stock

Silicone Rubber Thixotropic Additive (thickener)

A silicone rubber thixotrope can be used to thicken up any of our RTV Silicone Rubbers that we stock.

Once applied to your silicone mix the rubber can be used to coat vertical surfaces (without run-off and wastage) or piped to create seams for a multi part case. Thixotropic additive can also be used to fill voids and cavities in your moulds.

An essential product for all aspiring and professional mould makers!


£10.00 - £36.00


Next Day Delivery*

We endeavour to dispatch all order within 24 hours, but please allow 3-5 working days for delivery (due to current global supply chain issues).

Shipping Information

Our shipping costs are worked out by the gross weight of your order delivered to your address. NB: We do not currently ship internationally (UK only).


The catalysed silicone rubber mixture will be made non flowable by the addition of XIAMETER® RTV-3011 Thixo Additive.

Add just 1 to 3% by weight of XIAMETER RTV-3011 Thixo Additive to the catalysed silicone ( any more and you’re just wasting it ! ). A little goes a long way!

Mix thoroughly until a paste consistency is reached.

Be aware that the Thixo is solid at room temperature ( lard like consistency ). It can be be made liquid by the application of gentle heat. Try putting the container in pan of hot water or rest it on top of a radiator. After a few minutes the material will be liquid and pourable.

For Technical and Safety sheets please go to our Knowledge Hub