Solid Cast 660 Polyurethane Casting Resin 1L kit, showing Part A resin and Part B hardener 500ml bottles
Grey plastic gear-shaped parts cast using Solid Cast 660 Polyurethane Casting Resin, showing fine detail reproduction

Solid Cast 660 | Polyurethane Casting Resin 1:1 | 1L Kit

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Solid Cast 660 Polyurethane Casting Resin 1:1 | 1L Kit

Extremely fluid, light amber, low odour reactive polyurethane that pours like water into a mould, reproducing the finest details. Mixed at a simple 1:1 ratio and naturally degassed, it sets quickly into a firm, durable plastic that can typically be demoulded in around 15 minutes.

Kit Includes

1 x 500ml Part A (resin) 1 x 500ml Part B (hardener)

Product Details

Kit Size
1L (500ml + 500ml)
Mix Ratio
1:1 by volume
Working Time
2 – 2.5 minutes @ 20°C
Demould Time
15 – 40 minutes @ 20°C
Shore Hardness
75D
Filler Capacity
Up to 200%
Minimum Mix Volume
100ml combined (A + B)

Key Features

Extremely fluid Low odour Naturally degassed High filler capacity Reproduces fine detail

Common Uses

Models & figurines Jewellery casting Industrial parts Decorative pieces Car restoration (knobs, switches, trims)

How to Use

1
Shake both Part A and Part B bottles well before use.
2
Measure out equal parts A and B by volume — for example, 100ml Part A to 100ml Part B — into a straight-sided, flat-bottomed container. For optimal mixing, use a minimum of 100ml combined A and B.
3
Mix thoroughly with a flat, ruler-shaped stick, scraping the sides and base. Work time is short, so mix in under a minute until the colour is streak-free and uniformly light amber.
4
Pour immediately into your silicone rubber mould. Demould after 15 – 40 minutes at 20°C.

Colour & Fillers

Solid Cast 660 cures to an amber/white finish, or cloudy white if any moisture is absorbed during mixing. It can be coloured using epoxy pigments, dyes and mica powders, and accepts a filler ratio of up to 200% (mineral or metallic) to imitate materials like bronze or aluminium.

Storage & Safety

Solid Cast 660 is moisture sensitive — replace the caps on both bottles immediately after use to prevent premature curing or clouding.

Frequently Asked Questions

What is Solid Cast 660 Polyurethane Casting Resin?+
Solid Cast 660 is an extremely fluid, low odour reactive polyurethane casting resin that pours like water into a mould, reproducing the finest surface details. This 1L kit contains 500ml Part A and 500ml Part B.
What's the mix ratio for Solid Cast 660?+
Mix Part A and Part B at a simple 1:1 ratio by volume — for example, 100ml of Part A to 100ml of Part B — until the mixture is streak-free.
How long does it take to set and demould?+
Working time is 2 – 2.5 minutes at 20°C, and pieces can typically be demoulded within 15 – 40 minutes at 20°C.
Can Solid Cast 660 be coloured or filled?+
Yes. It accepts epoxy pigments, dyes and mica powders for colour, and can take a filler ratio of up to 200% (mineral or metallic) to imitate materials like bronze or aluminium.
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Reviews

Customer Reviews

Based on 29 reviews
83%
(24)
14%
(4)
3%
(1)
0%
(0)
0%
(0)
t
trevor sommerville

Solid Cast 660 | Polyurethane Casting Resin 1:1 | 1L Kit

H
Happy castor
My new resin

Worked like a dream. Great product

B
Bryan Rafferty

Solid Cast 660 | Polyurethane Casting Resin 1:1 | 1L Kit

C
Chrissy carter
Good service

Parcel arrived In Good time. All was well.

C
Christopher Vidal
Good product, highly recommended

I used this material to create figurines and it is excellent

M
Maskey Hayden
Poly resin stuff

Good stuff. I make a lot of little models and fridge magnets. Used to buy from “BARNES” it you guys are cheaper.
Thanks.

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