Downloads (2)

Safety Datasheet (SDS)300 KB
Technical Datasheet (TDS)797 KB

Specification

Product Data
ColourBrown
Chemistry / MaterialPolyurethane
Viscosity750mPa.s
UV StabilityModerate
BrandEasy Composites
Pot Life (Typical)5mins
Initial Cure Time1Hrs
Cured Mechanical Properties
Max Service Temp80°C
Hardness90 (Semi Flexible)Shore A
Hardness45 (Semi Flexible)Shore D
FlexibilitySemi Flexible
Tensile Strength80 - 85MPa
Elongation at Break350 - 400%
Tg Onset (DMA)80°C
General Properties
Gross Weight1.2kg

Xencast PX90 Hard Flexible Polyurethane Resin

Xencast® PX90 is a very tough, semi-flexible 90 Shore A hardness polyurethane (PU) casting resin with superior impact and abrasion resistance. It is ideal for casting hand tools, props/training weapons, skateboard wheels and even snowboard edges. It is also suitable for making semi-flexible and very durable concrete casting moulds.

PX90 cures to a translucent amber appearance but can be pigmented to any colour. Degassing is not necessary but will improve performance.

Sold as a kit (Part A and Part B). Available to buy online in 1kg, 4kg and 10kg kits.


PRODUCT VERSIONS

Pack Size

AVAILABILITY:Out of Stock

New stock is on its way. If you order this product it will be dispatched to you as soon as we have new stock. See product description for ETA.


PRICE
£19.80inc. VAT
(£19.80 /KG)
Out of Stock

New stock is on its way. If you order this product it will be dispatched to you as soon as we have new stock. See product description for ETA.

QTY
EACH
EACH
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Xencast® PX90 is an industry leading semi-flexible polyurethane casting resin which cures to a firm yet still slightly flexible 90 Shore A hardness whilst retaining unbeatable abrasion resistance and resilience.

Xencast® PX90 is ideal for product applications requiring a semi-flexible yet highly durable material including hand tools, skateboard wheels, engine bushes, props and training weapons. PX60 can also be used to produce durable and long-lasting semi-flexible moulds for concrete casting.

Utilising the latest polymer technology, Xencast® PX60 is able to create flexible PU parts with superior abrasion and wear resistance and chemical tolerance.

PX90's highly translucent formulation means that it accepts pigments very well resulting in strong vibrant colours from reduced pigment concentrations. This translucency also makes it possible to use translucent tinting pigments to produce semi-transparent coloured castings which can even be illuminated.

Advantages

  • Semi flexible, 90 shore flexible polyurethane.
  • Excellent abrasion resistance.
  • High tear strength.
  • Dimensional accuracy and fine detail reproduction.
  • Easily pigmented (translucent).
  • Low viscosity.
  • Easy 1:1 mix ratio.

Suggested Uses

  • Hand tools such as mallets
  • Training weapons and theatrical props
  • Firm wheels/tyres (including skateboard wheels)
  • Ski/snowboard/kiteboard edges
  • Concrete casting moulds

In conjunction with a suitable mould, Xencast® PX90 can be used to produce semi-flexible products such as hand tools, machinery wheels, edges for recreational sports equipment like snowboards and kiteboards as well as theatrical props and training weapons (dummy guns, knives batons etc.).

Xencast® PX60’s abrasion resistance, tear strength and resilience also make it ideally suitable for producing durable and long-lasting moulds for concrete casting.

Compatibility Information - Dos and Don'ts

Although by no means an exhaustive list, the mould materials, pigments and additives listed below have all been tested and are known to work well with Xencast® PX90.

Please download the technical datasheet for full details.

  • Compatible Moulds
  • Condensation/tin cure RTV silicone rubber
  • Addition/platinum cure RTV silicone rubber
  • Polypropylene and polyethylene mould 'trays'
  • Compatible Pigments
  • Polyurethane Colour Pigment (for vivid opaque colours)
  • Translucent Tinting Pigment (for less vivid opaque colours)
  • Compatible Fillers
  • Filler powders are not recommended

Xencast® PX90 should not be cast into latex rubber moulds. It should not be cast in contact with moisture or moisture harbouring materials such as wood.

Key Processing Information

  • Ease of Use
  • Suitable for professional and hobby use (follow SDS advice).
  • Odour
  • PX90 is almost odourless.
  • Appearance
  • PX90 is a translucent light amber colour.
  • Safety Precautions
  • Wear gloves and goggles and work in a well ventilated area. Always read the SDS before use.
  • Ambient Conditions
  • Can be used from 10 to 30°C although pot-life and cure time will be affected significantly. For small or thin-section castings an ambient of 20-25°C is required.
  • Degassing
  • Although not essential, vacuum degassing PX90 will eliminate air bubbles and ensure maximum tear resistance.
  • Mix Ratio
  • Mix 'Part A and 'Part B' 1:1 by weight. Use digital scales.
  • Mixing
  • Mix thoroughly by hand for at around 2-3 minutes.
  • Pot-Life
  • 5 minutes. Be sure to pour your casting(s) before this time.
  • Thin Sections
  • Thin sections will cure more slowly than thick sections. Make sure you allow enough time for thin sections to cure.
  • Cure Time/Demould
  • Larger castings will heat up more and cure quicker than small castings. Typical demould time is 1hr at 25°C however full cure will not be reached for a further 7 days.
  • Shelf Life
  • The shelf life is 6 months from date of manufacture.
  • Pigments and Fillers
  • Pigment using polyurethane colour pigments or translucent tinting pigments.

Xencast® PX90 is an industry leading semi-flexible polyurethane casting resin which cures to a firm yet still slightly flexible 90 Shore A hardness whilst retaining unbeatable abrasion resistance and resilience.

Xencast® PX90 is ideal for product applications requiring a semi-flexible yet highly durable material including hand tools, skateboard wheels, engine bushes, props and training weapons. PX60 can also be used to produce durable and long-lasting semi-flexible moulds for concrete casting.

Utilising the latest polymer technology, Xencast® PX60 is able to create flexible PU parts with superior abrasion and wear resistance and chemical tolerance.

PX90's highly translucent formulation means that it accepts pigments very well resulting in strong vibrant colours from reduced pigment concentrations. This translucency also makes it possible to use translucent tinting pigments to produce semi-transparent coloured castings which can even be illuminated.

Advantages

  • Semi flexible, 90 shore flexible polyurethane.
  • Excellent abrasion resistance.
  • High tear strength.
  • Dimensional accuracy and fine detail reproduction.
  • Easily pigmented (translucent).
  • Low viscosity.
  • Easy 1:1 mix ratio.

Suggested Uses

  • Hand tools such as mallets
  • Training weapons and theatrical props
  • Firm wheels/tyres (including skateboard wheels)
  • Ski/snowboard/kiteboard edges
  • Concrete casting moulds

In conjunction with a suitable mould, Xencast® PX90 can be used to produce semi-flexible products such as hand tools, machinery wheels, edges for recreational sports equipment like snowboards and kiteboards as well as theatrical props and training weapons (dummy guns, knives batons etc.).

Xencast® PX60’s abrasion resistance, tear strength and resilience also make it ideally suitable for producing durable and long-lasting moulds for concrete casting.

Compatibility Information - Dos and Don'ts

Although by no means an exhaustive list, the mould materials, pigments and additives listed below have all been tested and are known to work well with Xencast® PX90.

Please download the technical datasheet for full details.

  • Compatible Moulds
  • Condensation/tin cure RTV silicone rubber
  • Addition/platinum cure RTV silicone rubber
  • Polypropylene and polyethylene mould 'trays'
  • Compatible Pigments
  • Polyurethane Colour Pigment (for vivid opaque colours)
  • Translucent Tinting Pigment (for less vivid opaque colours)
  • Compatible Fillers
  • Filler powders are not recommended

Xencast® PX90 should not be cast into latex rubber moulds. It should not be cast in contact with moisture or moisture harbouring materials such as wood.

Key Processing Information

  • Ease of Use
  • Suitable for professional and hobby use (follow SDS advice).
  • Odour
  • PX90 is almost odourless.
  • Appearance
  • PX90 is a translucent light amber colour.
  • Safety Precautions
  • Wear gloves and goggles and work in a well ventilated area. Always read the SDS before use.
  • Ambient Conditions
  • Can be used from 10 to 30°C although pot-life and cure time will be affected significantly. For small or thin-section castings an ambient of 20-25°C is required.
  • Degassing
  • Although not essential, vacuum degassing PX90 will eliminate air bubbles and ensure maximum tear resistance.
  • Mix Ratio
  • Mix 'Part A and 'Part B' 1:1 by weight. Use digital scales.
  • Mixing
  • Mix thoroughly by hand for at around 2-3 minutes.
  • Pot-Life
  • 5 minutes. Be sure to pour your casting(s) before this time.
  • Thin Sections
  • Thin sections will cure more slowly than thick sections. Make sure you allow enough time for thin sections to cure.
  • Cure Time/Demould
  • Larger castings will heat up more and cure quicker than small castings. Typical demould time is 1hr at 25°C however full cure will not be reached for a further 7 days.
  • Shelf Life
  • The shelf life is 6 months from date of manufacture.
  • Pigments and Fillers
  • Pigment using polyurethane colour pigments or translucent tinting pigments.

Downloads (2)

Safety Datasheet (SDS)300 KB
Technical Datasheet (TDS)797 KB

Specification

Product Data
ColourBrown
Chemistry / MaterialPolyurethane
Viscosity750mPa.s
UV StabilityModerate
BrandEasy Composites
Pot Life (Typical)5mins
Initial Cure Time1Hrs
Cured Mechanical Properties
Max Service Temp80°C
Hardness90 (Semi Flexible)Shore A
Hardness45 (Semi Flexible)Shore D
FlexibilitySemi Flexible
Tensile Strength80 - 85MPa
Elongation at Break350 - 400%
Tg Onset (DMA)80°C
General Properties
Gross Weight1.2kg
Can’t find the answer you’re looking for?Ask our technical team a question.

Glass Bubbles can be added to most resins to reduce the density of the cured material. However, bear in mind that they will reduce the clarity of the GlassCast resin, making it more of a translucent 'milky' appearance rather than transparent.

You can certainly use this resin without degassing however we do recommend degassing to ensure maximum performance of the finished product by removing all traces of air. Bubbles can form weak points in the casting which promote tearing and ultimately early failure.

Due to the short pot life, if you do choose to degas the resin then we would recommend a degassing system that uses a high capacity pump so that there is enough time to degas within the resins pot-life. Our Professional Vacuum Degassing System - EC20-1 Vacuum Pump is the ideal one stop solution for degassing highly reactive resins with short pot-lives.

Assuming your skateboard wheels are perfect cylinders then the volume is quite easy to calculate using the formula Πr²h which in your case r = 25mm and h = 30mm giving a volume of 58.9 cm³. For Example, the density of PX90 is fractionally over 1g/cm³ which means you need 58.9g of resin per wheel or 235.62g for a set of 4. However check the density of the specific resin you are using in all cases so you multiply by the right figure to get an accurate weight.

However, most skateboard wheels have cut outs or hollows so the reality is you will use less resin. Calculating the volume in that case is a little more complicated as you need to calculate the volume of the cut outs then take it from the figures above to give the actual volume.

...the shore should be around 70 ish. Also, how well does it bond to metal, and can I treat the metal with a product to increase the adhesion?



Most commonly motor mounts (engine bushes) are made using something more like an 80 or 90 shore resin. In fact our PX90 has been used by a number of customers to create engine mounts.



If you're confident that you do need a 70 shore for your application then our closest shore hardness would be our PX60 but my opinion is that this would be too soft for most typical engine mount applications.



As for the bond to metal, we don't really have, and you shouldn't really need, an adhesion promoter for PU to aluminium - they should bond well. As usual, just make sure the surface is clean, completely grease-free (using acetone) and lightly keyed (using abrasive paper).

Yes, you can mix the 2 different hardness's to get one that is half-way.

If you choose to do this you need to accurately mix all 4 parts at 25% each as the resin and hardener are different on every hardness, extra care should also be taken to thoroughly mix the resin to ensure consistency throughout the finished part.  

It probably wouldn't be practical to resin infuse PX90 into a Kevlar reinforcement to make a reinforced hose. The main issue would be the pot-life and cure time of the resin, the PX90 has a really short pot life - only around 5mins - and cures very quickly, far more quickly than you would be able to undertake a vacuum infusion unfortunately.

No, PX90 is not a UV stable resin and will yellow following prolonged UV exposure. Addition of pigments will help reduce the visibility of this but not stop it entirely and so the resin should be considered for mechanical applications, rather than cosmetic ones.

To use PX90 in a polyester or vinylester mould, you will need to use a mould release agent to ensure the resin does not stick to the surface. We would recommend using our Easy-Lease Chemical Release Agent due to its semi-permanent nature and the very good release properties.

The formulation of the PX90 PU resin is designed to produce a 90 Shore A hardness resin only.

If you are after 60 Shore A, then we would recommend our Xencast PX60 Medium Flexible Polyurethane Rubber.

For large castings, pouring in stages will help control the temperature of the resin ensuring it does not exotherm. The PU will bond to itself in subsequent layers no problem will need a degrease and thorough  key with abrasive paper before pouring subsequent layers.

Maybe. Metal powders will mix into the PX90 OK but the probably you're likely to have is sanding the resin to expose and score the metal powder which is likely to prove difficult on a flexible material, although it is possible that you could still find a way to do it. Without exposing the metal powder in this way, the metallic effect is much less pronounced.

If a good metallic finish is the priority then we would recommend a typical rigid curing polyurethane such as our Xencast P2 Fast Cast Polyurethane Casting Resin which can easily be sanded and polished to produce the metallic finish.

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