General-Purpose Silicone Additives

General-Purpose Silicone Additives offer a range of solutions to tailor silicone rubber systems to specific needs. These products include thickeners, thinners, silicone oil, and surface-smoothing additives, each serving a unique purpose in the modification of silicone properties.

Key Features

Silicone Thinner™: A non-reactive fluid that reduces viscosity, enhancing flow and detail capture.
THI-VEX™: A thickening agent for most Smooth-On silicones, allowing for brush-on applications on vertical surfaces. It is skin safe and maintains the durability and flexibility of the silicone.
Smoothie Spray: A water-based lubricant that smooths silicone surfaces without dissolving them, ideal for shaping and finishing.

Available in General-Purpose Silicone Additives

Product	Shelf Life	Operating Temperature
Silicone Thinner™	-	-
THI-VEX™	Limited	23°C
Smoothie Spray	-	-

Why buy at FormX?

Dedication to Materials

For over thirty years we have sought out the highest quality modelling, moulding and casting materials from around the world.
Inspiring + Unique

From silicones and resins to Jesmonite and special effects materials — a curated range for professionals, artists and makers.
Expert Advice

Our sales team is widely known for their knowledge and dedication, supporting you in mould making, casting, sculpture and prototyping.
Shipping Across Europe

We ship from our warehouses in Amsterdam, Barcelona and Madrid to customers throughout Europe, from Greece up to Norway.
Amsterdam Original

Founded in Amsterdam, FormX grew from a local art foundry into a major European supplier — with our roots firmly in the city.

FormX is specialized in the supply of the highest quality 3D modelling and reproduction materials available and has warehouses and showrooms in Amsterdam, Barcelona and Madrid.

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