UltraCast XT Heat Resistant Clear Artwork Resin - 1.5 kg

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£31.62 (Exc Tax)
£37.95 (Inc Tax)
Current Stock:
1,100.00 Grams

UltraCast xt is an ambient temperature curing, optically clear, solvent free epoxy coating/casting resin with excellent surface heat resistance up to 90 - 95°C.


SIZE: 1.5 kg (1000g resin : 500g hardener)

UltraCast xt Heat Resistant Clear Artwork Resin produces a high gloss, flexible and tough coating with good impact and abrasion resistance. The excellent optical clarity and viscosity makes it ideal for the following applications:

  • Sealing and coating of artwork/paintings made with acrylic paint, oil paint & watercolour paints
  • Sculptures and mould castings (up to 1000cc in volume)
  • Tabletops, bar counters and kitchen worktops
  • Penny floor and pigmented epoxy floor applications
  • Sealing coasters

Please be aware that if tints are used with UltraCast xt there is a chance colours could bleed into one another if poured next to each other, as the formula has a longer working time and is thinner than MasterCast art resin.

IMPORTANT: This resin needs a minimum of 7-10 days to reach maximum cured properties and temperature resistance. The addition of pigments (inks, powders and pastes) as well as other resin additives (resi-BLAST, silicone, lubricants, alcohol or solvents) will lower its temperature resistance, this is because pigment substances themselves have a very low temperature threshold. The higher the addition rate of pigments & additives which are added or mixed into UltraCast XT, the more you'll lower and compromise the thermal withstand of the cured mass. In this case, we recommend that a final clear topcoat of UltraCast xt is applied on top of the pigmented layer to bolster its resistance against hot objects placed on it.

We carry UltraCast xt in 2 sizes, 1.5 kg and 3 kg. We can also get larger sizes in, send us an email if you are after larger kits.

The coverage guide below will give you an idea of what you can cover with the two sizes we carry. The exact coverage will depend on how thick you want your resin coating and the type of media you are covering.

UltraCast xt Pack Size

Coverage at 0.5 mm thick

1.5 kg Kit

2.145 m²

3 kg Kit

4.29 m²




  Mix ratio    by weight & volume: 100 parts resin to 50 parts hardener
  Surfaces   canvas, wood, MDF, glass, perspex, concrete & metal
  Curing time    touch dry in 24 hours at 20°C - full heat resistance achieved after a couple of weeks
  Coverage   1 litre of the mixed product will cover approx. 1.43m² @ 0.5 mm thick (1kg = 1 litre)
  Pot life   At least 1.5 hours at 20°C (mixed mass 250g)
  Shelf life   one year in sealed containers


The mixing ratio must be accurately followed to achieve perfect results. It is not possible to change the ratio which would result in the resin not drying properly and lower mechanical properties.

The mixed components should be thoroughly stirred for 3-4 minutes to ensure an even consistency. Epoxy systems tend to heat up in a pot than as a thin film, only mix the amount needed for use within the pot life of the product.


The product can be applied by pouring from the mixing vessel or by brush or roller. The mixed resin can be tinted with our resi-TINT pigments, resi-METAL or resi-TINT+ Metallic Powders to make your artwork pop. resi-BLAST will add stunning cells and effects.

UltraCAST XT Technical Data Sheet PDF

UltraCAST XT Safety Data Sheet PDF

Although this resin is user-friendly, it is advisable to follow good industrial hygiene e.g. wear gloves & long-sleeved clothing, don't eat/drink when working with resin. 

We always recommend doing your own research, and make your own decisions on any precautions you need to take. Read the SDS and get advice if needed. We suggest ensuring you have good ventilation, and protect your skin and eyes (use nitrile gloves only, don’t use latex with resin). If you work with a large amount of resin, or work with it often, you might want to invest in a VOC filtered face mask.

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