Polycraft FC3680 Black Polyurethane Casting Resin
Size: 500g Kit (250g Part A & 250g Part B)Size: 1kg Kit (500g Part A & 500g Part B)Size: 2kg Kit (1kg Part A & 1kg Part B)Size: 4kg Kit (2kg Part A & 2kg Part B)Size: 10kg Kit (5kg Part A & 5kg Part B)Size: 20kg Kit (10kg Part A & 10kg Part B)

Polycraft FC3680 Black Polyurethane Casting Resin

Price:  £16.00(Inc. 20% VAT)(£13.33 Exc. VAT)
Earn 16 Loyalty Points
Quick Link Code:  QL6511

Choose option(s):


Polycraft FC3680 Black Polyurethane Casting Resin - Cured SamplePolycraft FC3680 Black Polyurethane Casting Resin - Cured Sample
Small Plastic Mixing Sticks / StirrerSmall Plastic Mixing Sticks / Stirrer

Polycraft FC-3680 Black fast cast resin is an odourless two component polyurethane system which is designed for rapid demould times and can be used filled or unfilled. Polycraft FC-3680 Black can be used unfilled in prototyping and model-making areas, or filled with mineral or metallic fillers in pattern-making or for thermoforming tools. Polycraft FC-3680 Black gives outstanding colour density and removes the need for black pigmentation.

Special Features
• Strong thin sections
• Good thermal resistance
• Excellent impact resistance
• Excellent dimensional stability

Mould Preparation
Ensure that the mould is clean and dry and for flexible moulds, use RTV silicone rubber. If the mould is wooden, ensure the wood is well sealed with varnish and/or wax based release agent.
Resin Preparation
Shake the Part A thoroughly in order to homogenise the resin. For best results, ensure that the two components are at 20 – 25°C before mixing.
Mixing Instructions
When using unfilled, add the correct amount of Part B to the Part A and stir for 30 seconds. Pour carefully in one place into the mould in order to avoid air inclusion. If using filled, we recommend the use up to 200% filler, Aluminium hydroxide for general bulking out and shrinkage reduction, aluminium Powder for higher temperature applications. Large quantities of material, filled or unfilled.
The casting can generally be demoulded in 60 minutes at room temperature. The precise demould time will vary with casting thickness, as thin section units will cure slower than thicker section units. When casting thin wall sections, ensure that the mould and resins are at least 20 – 25°C to facilitate a good cure and reduce the risk of brittleness. To reduce the cure time, the mould can be pre-warmed to 40 – 60°C. It is not recommended to heat the liquid components.

FC3680 Unit
Mix Ratio By Weight 1A : 1B
Pot Life 3 - 4 mins
Demould Time 60 mins
Shore D Hardness 70 - 75
Mixed Viscosity mPas 250 - 450
Elongation at Break % 6 - 9
Linear Shrinkage % < 0.2
Heat Distortion Temp 60 - 65°C
Tensile Strength Mpa 25 - 30


Average Rating (4 Reviews):  
Write a Review and share your opinions!

Good black colour
02 November 2018  | 

Previously been using the Sg2000 and adding pigment but have now found my new favourite resin.

Was this helpful to you?  Yes  /  No

2 of 2 people found this review helpful.

Great detail
26 September 2018  | 

I love this resin, very predictable and quick setting, very strong and holds great detail. Works very well in bronze powder dusted moulds.
See me using it with bronze in my YouTube video

Was this helpful to you?  Yes  /  No

4 of 4 people found this review helpful.

Very Well Behaved
20 August 2017  | 

The more I use this resin, the more I like it. Predictable, strong, very easy to use, happy in any kind of mould, not throwing a hissy fit when the temperature is off by a degree or two - very nice indeed. Wish all resins were like that ...

Was this helpful to you?  Yes  /  No

2 of 2 people found this review helpful.

Very pleased
29 September 2015  | 

1lt pack used. Vary well packaged and labeled. Product is well pigmented. Found it a lot thicker than the easy flow 60 but i think the clue is in the title. Performed as described e.g measure, mix, stir then pour.

Was this helpful to you?  Yes  /  No

2 of 2 people found this review helpful.

Polycraft FC3680 Black Fast Cast Resin


Same day despatch

On order placed before 1pm
Monday to Friday

More info

Quantity & volume calculator

Get the right quantity every order

More info
call us now: 028 90 861992 mon-thu 8:30AM - 5:00PM , fri 8:30AM - 3:30PM
0 items - £0.00