Polycraft GP3481-F General Purpose RTV Condensation Cure Mould Making Silicone Rubber
Size: 275g Kit,  Hardener: Red - Fast SetSize: 275g Kit,  Hardener: Clear - Fast SetSize: 275g Kit,  Hardener: Green - Very Fast SetSize: 550g Kit,  Hardener: Red - Fast SetSize: 550g Kit,  Hardener: Clear - Fast SetSize: 550g Kit,  Hardener: Green - Very Fast Set
Size: 1.1kg Kit,  Hardener: Red - Fast SetSize: 1.1kg Kit,  Hardener: Clear - Fast SetSize: 1.1kg Kit,  Hardener: Green - Very Fast SetSize: 2.2kg Kit,  Hardener: Red - Fast SetSize: 2.2kg Kit,  Hardener: Clear - Fast SetSize: 2.2kg Kit,  Hardener: Green - Very Fast Set
Size: 5.5kg Kit,  Hardener: Red - Fast SetSize: 5.5kg Kit,  Hardener: Clear - Fast SetSize: 5.5kg Kit,  Hardener: Green - Very Fast SetSize: 11kg Kit,  Hardener: Red - Fast SetSize: 11kg Kit,  Hardener: Clear - Fast SetSize: 11kg Kit,  Hardener: Green - Very Fast Set
Size: 22kg Kit,  Hardener: Red - Fast SetSize: 22kg Kit,  Hardener: Clear - Fast SetSize: 22kg Kit,  Hardener: Green - Very Fast Set

Polycraft GP3481-F General Purpose RTV Condensation Cure Mould Making Silicone Rubber

Price:  £9.60(Inc. 20% VAT)(£8.00 Exc. VAT)
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Quick Link Code:  QL2460

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Polymerization:  Condensation Cure

High strength silicone mould making rubber. Our silicone has been formulated for easy mixing by hand, with colour coded components (red or green) giving a visual aid to ensure mixing is adequate. The two components mix easily and because of the low viscosity most grades can be used without processing in a vacuum chamber. This silicone is suited for the detailed reproduction of figures, art objects and similar items.

Features :
Outstanding release properties
High Flowabilty and long working time
Medium Hardness
High tear resistance
High elasticity for easy removal of complex replica parts
Can be made thixotropic (non flowable) for vertical surface replication
Cured Properties of MBFG Silicone

  • Red silicone catalyst is by far the most popular catalyst to use with the GP-3481-F silicone, it gives great air release with longer working and demould times.
  • Clear catalyst is used when pigments are required, when mixing pigments into a white silicone base it can result in lighter shades of the colour intended. e.g. black pigment will become grey / dark grey.
  • Green silicone catalyst is used when time is off importance, it will cure a lot quicker roughly in half the time, but this will not give as good of air release as the red fast set catalyst.

NOTE - When using clear catalyst, best to double mix the silicone and catalyst because it is very hard to see if the catalyst has fully mixed through, so a double mix is advised.

  Red Fast Catalyst Clear Fast Catalyst Green Very Fast Catalyst
Mix Ratio 10 : 1 10 : 1 10 : 1
Working Time 40 - 60 Minutes 40 - 60 Minutes 20 - 30 Minutes
Curing Times  6 - 8 Hours @ 25° 6 - 8 Hours @ 25° 2 - 4 Hours @ 25°
Cured Colour  Light Pink White Light Green 
De-Mould Time  12 - 24 Hours  12 - 24 Hours 6 - 8 Hours
Mixed Viscosity mPas  18000  18000 18000
Hardness Shore A  27  27 27
Tensile Strength Mpa  3.0  3.0 3.0
Elongation @ Break %  520  520 520
Tear Strength kN/m  23  23 23
Linear Shrinkage  0.2-0.5  0.2-0.5 0.2-0.5

Kit Size's:
275g kit = 250g Silicone - 25g Catalyst
550g kit = 500g Silicone - 50g Catalyst
1.1kg kit = 1kg Silicone - 100g Catalyst
2.2kg kit = 2 x 1kg Silicone - 2x 100g Catalyst
5.5kg kit = 5kg Silicone - 500g Catalyst
11kg kit = 2 x 5kg Silicone - 2 x 500g Catalyst 
22kg kit = 20kg Silicone - 2kg Catalyst

250g of Silicone will fill approximately 200ml by volume
Instructions & data sheet downloads available under Technical & Safety Sheets on the tab above.  
Please note this silicone is not suitable for food use. It is also not suitable for direct use on skin.

Base and catalyst use universal containers for various kit sizes and are supplied by weight, while the supplied containers may not be full, they will contain the correct amount of both base and hardener according to the listing. At point of packaging and dispatch lids may be taped to prevent damage or spillage during transportation.

Average Rating (11 Reviews):  
Write a Review and share your opinions!

Perfect for making moulds of ceiling details
Tuesday, 10 December 2019  | 

This is the real deal. I'm a novice, and have been using it to create moulds of ornate Victorian papier mache cornice and other ceiling details to replace damp-damaged areas. I've just completed one large cornice section that's over a metre long. I don't have a vacuum chamber, so I followed MBFG's advice of painting the first layer on, then pouring the rest into the mould box. I can't believe how well the moulds have turned out - no bubbles at all, and no reaction with the various paints on the original cornice - unlike latex, which reacted badly to some gold paint. I was able to take a good section of the original cornice from the ceiling and build a mould box on the bench, but I understand that there's a thickener additive available that would allow you to do it in situ.

The container has some excellent instructions on it, but MBFB also has some great documents and videos - I'd recommend studying them first - but if you follow the directions carefully, you'll get excellent results like mine. I'd also recommend looking at some of the ancillaries - the plastic stirring sticks and breakout bowls were particularly useful.

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6 of 6 people found this review helpful.

Look. No further.
Tuesday, 23 October 2018  | 

I used to use a very well known product until I tried this.i is just as good with no bubbles and it's actually half the price per kilo than what I used to use , fantastic stuff!!

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5 of 5 people found this review helpful.

First time mound making
Thursday, 15 March 2018  | 

I had a go at mouldy making for the first time with this kit. It was very easy to use and really pleased to find out the harder and silicon were packaged in the correct weights for mixing. I also found, when I made a call to the company, a very helpful chap on the line, he gave some solid advice and some hints and tips. Great service, great product.👍👌

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20 of 42 people found this review helpful.

Friday, 27 October 2017  | 

Dont look any furthur polly craft moulding and casting resins are second too none i have tried dozens of products over the years and these are far superior highly recommend

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10 of 35 people found this review helpful.

Excellent Product
Monday, 12 June 2017  | 

This is now my 'go to' silicone, the potlife with the red catalyst gives me plenty of time to set it up and pour my molds. The 27 shore ensures a good medium hardness that is strong enough for most projects and forgiving enough to allow easy removal of the pattern part. Highly recommended.

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11 of 27 people found this review helpful.

Good stuff
Tuesday, 8 April 2014  | 

My project would've been sunk without this product. Took a little trial and error as I needed to make a mould of part of a cornice on the ceiling but once I got the technique right the mould was spot on. Very versatile, simple 10:1 ratio makes it easy to mix and sets well.

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27 of 53 people found this review helpful.

Easy to use and gives great detail
Saturday, 15 March 2014  | 

Coloured hardener makes it easy to check you have mixed thoroughly.

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27 of 34 people found this review helpful.

rtv silicone
Wednesday, 4 December 2013  | 

fast service,i placed my second order now.and have found the silicone very easy to use.site very user friendly and data sheets and info sheets helpful

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8 of 21 people found this review helpful.

Sunday, 22 September 2013  | 

I think the best silicone mould making rubber I had. Fast curing, very strong and ideal for brush on moulds when mixed with thixo. Wont change for any other silicone. Highly recommended.

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28 of 40 people found this review helpful.

Excellent delivery
Saturday, 18 May 2013  | 

Fast delivery, excellent product and kept me well informed, will use this as my new distributer

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23 of 45 people found this review helpful.

Read all 11 customer reviews...

Polycraft GP-3481F Silicone Moulding

Polycraft GP-3481F Silicone Moulding Without Vacuum Chamber

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