UltraCast xt is an optically clear epoxy coating/casting resin, it is solvent free with excellent UV resistance and surface heat resistance up to 80°C
UltraCast xtresin produces a high gloss, optically clear, attractive finish. It's self-levelling, can be turned, cut, sanded and polished making 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
Please be aware that if tints are used with UltraCastxt 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. Please be advised although our resins are U.V stabilised this does not mean they are U.V proof. Ultimately all our clear epoxy resins will show signs of U.V degradation over time. We work constantly to improve the U.V protection however resins are plastics and over time the sun will always win that battle.
This resin system needs 14-21 days to reach maximum cured properties and temperature resistance. If successive layers are applied less than 14 days after the last layer then there will be a surface tension mismatch between layers, resulting in stress lines, wrinkles and other surface optical defects. Although it is touch hard after 24hrs, the surface tension will still be changing over the next 14-21 day period as the epoxy creeps slowly up to 100% cured properties. If you already have wrinkle lines then please give the surface a light sanding and overcoat with a new resin layer (after the prescribed time period).
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 addition of alcohol inks in particular can cause problematic surface finish due to its effect of lowering the viscosity (diluting the resin and impacting its density). It can result in cloudiness, dimples and other surface blemishes. The alcohol content in these inks will nullify the resin’s non-flammable properties. When alcohol inks or any other solvent is added, special care should be taken when heating the surface with an open flame blowtorch or butane gun.
The more pigments & additives which are added or mixed into UltraCastxt, the more the thermal withstand of the cured mass is lowered and compromised. In this case, we recommend a final clear topcoat of UltraCast xtis applied on top of the pigmented layer to bolster its resistance against hot objects placed on it. The heat resistance of all polymers is bolstered by casting depth. Cured thickness functions as an effective heat dissipater. For optimum T.G properties we advise a casting depth of at least 1-2mm.
Due its long open time, UltraCastxtis susceptible to Amine Blush and Polymer Bloom under the following usage conditions : high humidity, low ambient temperature (15°C or below), draughty or windy conditions including air-conditioning. To avoid this effect from occurring we recommend the resin component (Part A) is pre-warmed before mixing with the Hardener. We also request that the working area is kept as consistent as possible with regard to temperature and humidity while the resin is curing.
UltraCastxtcomes in 4 pack sizes so you can buy exactly the right amount for your project. To help you choose the correct kit please see the coverage guide below, then make your selection from the drop down list above. 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
Application video for UltraCastxtClear Art Casting Resin
by weight & volume: 100 parts resin to 50 parts hardener
canvas, wood, MDF, glass, perspex, concrete & metal
touch dry in 24 hours at 20°C, full cure & heat resistance in 14-21 days
1 litre of the mixed product will cover approx. 1.43m² @ 0.5mm thick (1kg = 1L)
1.5 - 2 hours at 20°C (mixed mass 250g)
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.
Health & Safety
Although our resins are formulated with the most modern and safest epoxy chemicals available, all epoxy resins are chemicals and should be managed and handled with proactive safety hygiene and responsible care.
Always wear nitrile gloves (or use a specialist resin barrier cream)
Wear a respirator when sanding partially-cured resin
It is advisable to work in a well ventilated room
We advise the use of safety goggles
Avoid skin contact (if resin gets on skin wash with plenty of soap & water)
DO NOT eat, drink or smoke while working
In case of eye contamination wash with plenty of water for 15 minutes and consult medical advice immediately
Adding inks/paints/mica powder/glitter to epoxy resin will change its properties and may reduce its non-toxicity. If you use alcohol inks DO NOT use a flame to remove bubbles, as alcohol is flammable.