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Addition Cure (Platinum)

Addition cure silicones, also known as platinum cure silicones, are 2-part silicones where either skin contact or dimensional stability, food requirements or heat resistance is required. They have without doubt the longest lifespan of all the silicones available.

They also have minimal to zero shrinkage so are ideal when accuracy of casting is required weeks or months later. They are great for mould making for a variety of materials and industries, from epoxies, polyesters, plaster, and also low melting metals where heat tolerance is required. Industries are equally varied from rapid prototyping to Formula 1 or SFX applications, where a skin-safe silicone is needed for life-casting. Please take advice on correct release agents prior to pouring.

With the fantastic mechanical properties platinum cure silicones offer, they do need to be used carefully to avoid inhibition. Inhibition is when a platinum cure silicone doesn’t fully cure due to a form of contamination on the surface of what you are attempting to mould. Though it may look fully cured on the surface, when you separate it from the item you were moulding you will find a tacky surface - namely inhibition.

This is something you must be aware of when using platinum silicones and care must be taken - a good example is latex or moulding directly from a clay with sulphur. Both of these will cause the Platinum Cure silicone to inhibit. There are a number of solutions available to avoid this from happening but please if in any doubt contact a member of Mouldlife’s technical team if unsure at any time.

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Showing products 1 to 40 of 40
PlatSil Gel 0030

Low-viscosity silicone for hyper-realistic prosthetics with high strength, fast demould, and a soft, paintable finish.

From: £41.50
£34.58 (ex. VAT)
PlatSil Gel 0020

Extra-soft silicone for realistic prosthetics with fast demould and high strength.

From: £41.50
£34.58 (ex. VAT)
PlatSil Gel 00 Silicone Rubber

Ultra-soft silicone for realistic prosthetics with fast cure and adjustable softness.

From: £37.25
£31.04 (ex. VAT)
(1)
PlatSil Gel 10 Silicone Rubber

Fast-curing platinum silicone for soft, skin-like prosthetic and special effects applications with excellent workability.

From: £37.50
£31.25 (ex. VAT)
(2)
Smiths Prosthetic Deadener

Prosthetic Deadener for Platinum Silicone to soften the Shore Hardiness

From: £27.00
£22.50 (ex. VAT)
Pro-Gel FX10
From: £36.10
£30.08 (ex. VAT)
Pro-Gel 10 Silicone

Fast-curing prosthetic silicone system with low viscosity, strong bonding, and adjustable softness for realistic skin effects.

£0.00
£0.00 (ex. VAT)
Pro-gel Softener

Silicone softener for Pro-Gel 10, allowing adjustable flexibility for ultra-realistic, skin-like prosthetic effects in SFX applications.

From: £21.00
£17.50 (ex. VAT)
PlatSil® FS10 Silicone Rubber

A fast-setting, platinum-cure silicone rubber with a convenient 1:1 mix ratio, offering quick demould times, good working time, and versatile use for both pourable and brush-on moulding applications.

From: £37.50
£31.25 (ex. VAT)
Ad-Sil 13 Silicone Rubber

A two-part addition-cure RTV silicone with excellent tear strength and detail reproduction, ideal for precision mould making and duplicating intricate models with high durability and thermal resistance.

From: £33.60
£28.00 (ex. VAT)
Snap-Sil Silicone

Snap-Sil platinum cure silicone for life casting and mould making, offering skin-safe, thixotropic application with high detail and durability.

From: £60.00
£50.00 (ex. VAT)
Transil 20 HT
£60.00
£50.00 (ex. VAT)
Transil 20 Platinum Silicone (T20)

A translucent, ultra-low viscosity silicone elastomer with a fast cure and exceptional strength, ideal for rapid mould making and applications requiring durable, high-performance results.

From: £33.60
£28.00 (ex. VAT)
PlatSil® FS20 Silicone Rubber

A fast-setting, platinum-cure silicone rubber with a 1:1 mix ratio, delivering quick demould times, reliable working time, and versatile performance for both pourable and brush-on moulding applications.

From: £37.00
£30.83 (ex. VAT)
(1)
QC25

A two-part, low-viscosity translucent silicone with a 10-minute working time and fast demould, ideal for quick mould making and flat mould applications.

From: £45.00
£37.50 (ex. VAT)
Ad-Sil 20 Silicone Rubber

A low-viscosity RTV silicone rubber with high tear strength and excellent detail reproduction, ideal for precise mould making, prosthetic work, and applications requiring strong, stable, and easy-release performance.

From: £33.60
£28.00 (ex. VAT)
PlatSil Gel 25 Silicone Rubber

A versatile, low-viscosity platinum silicone offering excellent clarity and tear strength, ideal for mould making, prosthetics, and animatronics, with adjustable hardness for greater control across applications.

From: £37.50
£31.25 (ex. VAT)
(7)
PlatSil Deadener LV

Silicone deadener for PlatSil Gel, creating ultra-soft, skin-like prosthetics with reduced density and realistic feel for SFX applications.

From: £27.00
£22.50 (ex. VAT)
(1)
PlatSil Gel Part H Hardener

Silicone hardener for PlatSil gels, increasing Shore hardness and working time for stronger, more durable moulds and prosthetic applications.

From: £29.48
£24.57 (ex. VAT)
PlatSil Gel 7325 Silicone

A low-viscosity, platinum-cure silicone rubber with a convenient 1:1 mix ratio, offering good working time, easy mixing visibility, and reliable performance for both pourable and brush-on moulding applications.

From: £38.08
£31.73 (ex. VAT)
PlatSil 7329 Silicone Rubber

A high-performance platinum-cure silicone rubber with excellent working time and dimensional stability, ideal for detailed mould making and casting applications with both pourable and brush-on versatility.

From: £22.14
£18.45 (ex. VAT)
T-30 Clear Silicone

Clear, low-viscosity silicone with high strength, fine detail accuracy, and fast curing.

From: £33.60
£28.00 (ex. VAT)
PlatSil Siliglass Water Clear Silicone

Two-part clear silicone that cures to a glass-like finish, ideal for safe, breakable prop effects.

From: £45.50
£37.92 (ex. VAT)
RTV 1 Dow Corning Dowsil  732 90ml

One-part silicone sealant that cures to a flexible, durable rubber with strong adhesion and wide temperature resistance.

£9.00
£7.50 (ex. VAT)
Transil 45 Silicone

Two-part silicone elastomer that cures to a clear, flexible, and durable material, with optional heat acceleration.

From: £24.27
£20.23 (ex. VAT)
T4 Silicone

Translucent silicone with high tear strength, low shrinkage, and excellent detail for flexible mould making.

From: £31.34
£26.12 (ex. VAT)
Transil 40-1 Silicone

Translucent silicone elastomer with firm 40A hardness, ideal for durable moulds and rapid prototyping.

From: £27.92
£23.27 (ex. VAT)
HT 45 Transparent Silicone

Translucent platinum-cure silicone with a 1:1 mix ratio and durable 43A hardness.

From: £66.00
£55.00 (ex. VAT)
Addasil 40T
From: £26.63
£22.19 (ex. VAT)
Bluesil 3040 1:1

Fluid moulding silicone designed for casting polyurethane, epoxy and polyester resins as well as wax and polyurethane foams.

From: £43.61
£36.34 (ex. VAT)
Ad-260 Silicone

High-hardness silicone with excellent strength and dimensional stability, ideal for detailed mould making.

From: £62.40
£52.00 (ex. VAT)
RTV 1 Dow Corning Dowsil 734 310ml

One-part flowable silicone sealant that cures to a flexible, durable rubber with strong adhesion and excellent temperature resistance.

From: £19.90
£16.58 (ex. VAT)
RTV 1 ELASTOSIL A07

Low-viscosity, one-part silicone coating with excellent adhesion, ideal for sealing, priming, and painting silicone surfaces.

£40.32
£33.60 (ex. VAT)
Mouldlife Glass FX Siliglass 50gm

Clear, breakable silicone shards for safe, realistic glass effects in props and SFX makeup.

£7.80
£6.50 (ex. VAT)
(1)
Mouldlife Ice FX Siliglass 50gm

Cured Siliglass giving you an ice effect great for SFX 

£7.80
£6.50 (ex. VAT)
PlatSil 7315 Silicone Rubber

A two part, addition cure liquid silicone system that cures to a milky white translucent, A15 Shore rubber.

From: £47.50
£39.58 (ex. VAT)
(1)
PolyCoat Sealer & Release Agent 1.5lb

Designed for various applications in mold making and casting processes

£65.34
£54.45 (ex. VAT)
ML Clear 40 High Clarity Silicone

ML Clear 40 Silicone Rubber is a two-part, room-temperature curing silicone designed for high clarity and easy pouring thanks to its low viscosity. It offers a 30-minute working time, a fast 6-hour de-mould, and a simple 1:1 mix ratio. With a Shore 40A hardness, it is well suited for a wide range of mould making applications.

From: £28.41
£23.68 (ex. VAT)
Mould Doh silicone putty

Extremely quick, easy, and safe way to create moulds with excellent fine detail reproduction in less than 10 minutes

From: £18.00
£15.00 (ex. VAT)
(1)
Platsil Gel FS 00

An ultra-soft, platinum-cure silicone rubber designed for high-end special effects, prosthetics, and lifelike mouldings.

From: £34.97
£29.14 (ex. VAT)