Clear epoxy casting resin designed for deep sections, such as river tables, up to 50mm thick.
Use clear or add tints, pigments, metallic effects or even encapsulate objects within the resin.
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GlassCast 50 is a water-clear, UV resistant epoxy casting resin developed specifically to meet the demands of thick section casting - especially in contact with wood - making it the ultimate 'river table' epoxy.
Its slow-curing formulation allows it to be poured in depths of up to 50mm (25mm into wood) per layer without overheating.
GlassCast 50 has been formulated as a casting resin and not a coating resin meaning that it is water-clear even in very thick section. It doesn't, however, self-level to quite the perfectly flat, glossy finish of our GlassCast 3 coating resin and usually requires a flat and polish if a perfect finish is required on the open face.
GlassCast 50 Recommended Uses
GlassCast 50 Advantages
How to Use
GlassCast 50 has been developed for professional users to produce the best results possible. It is not a 'craft' product and not intended for children. Before purchase, storage or use you must read the safety and technical data. Having said that, GlassCast 50 is incredibly easy-to-use and delivers fantastic results under a wide range of conditions.
GlassCast 50 is sold as a kit which includes both the resin and hardener in their correct ratios. The resin and hardener are mixed together at a ratio of two parts resin to one part hardener by volume. Because GlassCast 50 is designed for thicker castings, it needs to cure more slowly than other GlassCast resins and will take around 48hrs to cure.
GlassCast 50 is very often used for 'river tables' where the resin is poured into wood, in which case the insulating effect of the wood means that the total depth should be built-up at a maximum of 25mm per layer, allowing around 24hrs between layers. For detailed information and tips on using GlassCast to create the perfect river table, read the Resin River Table Handbook and study the GlassCast 50 technical datasheet.
Always download the Technical Datasheet from the 'Downloads' tab for full details on correct measuring, mixing and use of the product.
Getting More Creative - Pigments, Tints and Metallics
Although GlassCast 50 is often used completely clear it is also compatible with our complete range of tints, solid-colour pigments and metallic-effect powders. Many other colours and powders can be added too but be sure to conduct a test to ensure compatibility.
|Appearance||-||Clear Liquid||Clear Liquid||Clear Liquid|
|Maximum Casting Thickness||mm||-||-||50 (into mould) |
24 (into wood)
|Viscosity (25°C)||mPa.s||650 - 950||180 - 300||400 - 700|
|Density||g/cm³||1.10 - 1.14||0.99 - 1.01||1.08 - 1.12|
Working & Cure Times
|Hardener||Pot-Life @ 25°C||Gelation Time @ 25°C 15ml 6mm||Gelation Time @ 25°C 100ml||Demould Time @ 25°C|
|GlassCast 50||75 - 95mins||10 - 12hrs||140 - 180mins||36 - 48hrs|
|Density @ 25°C||g/ml||1.08 - 1.12|
|Hardness @ 25°C||Shore D/15||80 - 85|
|Glass Transition||°C||61 - 58|
|Max Working temperature||°C||55|
|Flexural strength||MN/m²||90 - 102|
|Flexural Elastic modulus||MN/m²||2900 - 3200|
|Maximum Strain||%||4.0 - 5.5|
|Strain at Break||%||> 15|
|Tensile strength||MN/m²||51.0 - 58.0|
|Elongation at break||%||6 - 9|
Questions Asked About GlassCast 50
Yes, steel brackets or other 'hard points' could be encapsulated into the lower portion of the pour either as is, or recessed into the wood for a flush finish. You would need to ensure the hidden surfaces are fully keyed on the plate to help with adhesion of the metal to the resin. Finally it would be necessary to drill and clean the threads with a tap to ensure the plate is effective.
Yes you can clean the surface in that way or by using pre-made IPA wipes. Bear in mind, you will still need to key the surface with 120 grit sand paper before cleaning to ensure the best bond between the resin layers.
Certainly, we can sell the resin and hardener separately if you need extra of either one one its own. Although not listed on the website we can do this over the phone or you can email us and we can send you an invoice with the correct amounts on it. The hardener for each of the GlassCast products is unique for that product. Using hardeners from other resin systems will cause serious curing issues or it may not cure at all.
The GlassCast range of products are not designed for permanent outdoor use. Although the GlassCast resins have a very high level of UV resistance, the very high levels of UV exposure and the variety of inclement weather and environmental conditions experienced mean that the resin would degrade if permanently used outdoors.
Yes, once the GlassCast has fully cured, you should be able to paint over the top no problem but it will depend on the type of paint that you're using. Cured GlassCast is essentially a plastic so you're likely to need to use a two-pack paint like a polyurethane or an acrylic to get a really good bond. We would certainly recommend 'keying' the GlassCast with abrasive paper and then testing a small area first to check the quality of the bond.
HDPE is a very chemically inert low energy plastic and as such, in a similar fashion to polypropylene, nylon and PVC, resins will not stick to HDPE.
Yes GlassCast 3 can be used in this way. If you are making a river table and want a thin layer of resin right over the top of the wood as well, then using GlassCast 3 in this way over the top of the GlassCast 50 will give a smoother finish on the surface.
After allowing a minimum of 48 hours curing time, the GlassCast 50 can be machined, cut, sanded and shaped no problem. Once finished you will be able to polish the resin back to a very high gloss.
Yes, GlassCast 50 can be used to cover the top of the project as well as the deeper sections. The cured surface finish of GlassCast 50 is not quite as perfect as the GlassCast 3 (which is designed specially as a 'coating resin') but for most applications you would probably be perfectly happy with the surface finish straight from the GlassCast 50 pour. If you do need absolute perfection then you can always flat and polish the surface, which is quite easily done with GlassCast 10 and 50.
There are no known issues with encapsulating LED's in resin in terms of curing or using the resin. The only area of concern is ensuring the LED cluster is fully working before pouring the resin and also long term maintenance - any failed LED's would be unable to be replaced.
You can certainly use tints and pigments when working with LED's. The way the LED diffuses the light may effect how the overall piece looks.
GlassCast 50 is very much a rigid resin once fully cured and as such would not be considered to have any noticeable flexibility.
Yes you can layer the resin in that way. The ideal method is to pour the second and any subsequent layers when the first layer has become firm but is still tacky. At this stage no further preparation is needed and you are likely to get an almost invisible join line.
If you need to wait until after the first layer has fully cured, then the resin will need a key with sand paper and a thorough clean before pouring the next layer.
GlassCast will stick to many surfaces including stone and concrete. Where surfaces are smooth, it is recommended to key the surface to aid maximising adhesion.
It's worth noting that if you want a resin to 'coat' materials like stone or concrete then the GlassCast 3 Coating Resin would be a better choice. GlassCast 50 is designed for very thick section casting (up to 50mm) but would require polishing on the open surface to achieve the perfect flat gloss finish of GlassCast 3.
Nonetheless, you should avoid breathing in any odour/vapour in close proximity (i.e. smelling the containers) and of course if you may make your own decision to wear a vapour mask.
Small defects in the Glasscast finish can be cut/drilled out and then refilled to repair the damage. However it is essential that you thoroughly clean the area being repaired before you refill with resin to avoid any dust or dirt being trapped.
GlassCast 50 has a maximum working temperature of 55 °C which is much lower than the radiated heat given off by some fireplaces. As such we would not recommend keeping it too close to a fireplace or fire to avoid damaging the resin.
...I'm looking for clear resin for coasters and tables which can hold hot plate or mug.
The maximum working temperature for GlassCast 50 is 55°C. GlassCast 50 could be marked by hot objects such as very hot drinks (think fresh black coffee, no saucer). To improve the heat resistance of your GlassCast surface, an elevated temperature post-cure should be undertaken.
Even with the post-cure we would recommend being careful about placing down hot cups and items, ideally allowing them to cool first or use a saucer just to be on the safe side.
GlassCast 50 is ideal for larger pen blanks where it's clarity and ability to be poured up to 50mm is ideal. Once cured for a minimum of 48 hours, the pen blank will be ready to machine and turn.
Although you could use GlassCast 50 to make a decorative ashtray problem, heat from a cigarette butt would degrade and damage the resin surface over time meaning we would not recommend it for functional use.
As long as you reseal the bottles promptly after use and store them in accordance with the datasheet, then we would expect you to still achieve the full 12 months shelf life.
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