Frequently Asked Questions: Pourable Plastic
These are some of the most frequently asked questions that we get. We strongly suggest that you ALWAYS test the mixed epoxy on a sample piece BEFORE you apply to your final project, even if you are familiar with working with epoxy. The most common problem associated with using epoxy are inaccurate mix ratios or not mixing thoroughly enough. If you have any questions at all, please email us before you attempt your project. We are here to help!
This product says UV resistant. Can I use it on my outdoor projects?
Although there are UV inhibitors in the epoxy to help resist yellowing, all epoxies will yellow over time. It is not recommended you use this epoxy on your outdoor projects or projects that will be in direct sunlight (in a window).
My project is painted or stained with an oil based product, what can I do?
Oil-based products can cause the epoxy to fish-eye or create adhesion issues. There must be a definitive barrier between the oil-based coating and the epoxy. You can apply a water based clear coat (must be water based). Once the water based clear coat has fully cured, you can apply the epoxy. If the clear coat leaves a shine/gloss you may want to scuff the surface to ensure the epoxy properly sticks. We recommend using 320 grit sandpaper. If you do sand, be sure to thoroughly clean the surface prior to applying the epoxy. We recommend using Isopropyl Alcohol 99% (be sure it is 99%) to clean.
Is your epoxy food safe?
It is possible to be Food Safe. However, because the customer is mixing/pouring we cannot say this is Food Safe. Each mixture/application would have to be assessed individually.
I am pouring a large river table. Can I still pour 2" thick?
You can pour this product up to 2" thick for small castings and pours. When pouring in greater quantities, you may need to pour in layers of 1.5". When pouring over 5 gallons at a time, we strongly suggest pouring layers of 1" or less to prevent excessive heat generation, which could lead the project smoking, cracking, etc.
My project is still tacky after 48 hours. Is this normal?
Yes, this is a slow curing epoxy which is what allows for thicker pours. Gel times can vary from 18-24 hours and full cure can range from 36-72 hours, but largely depends on mass and temperature.
How much deep pour resin do I need for my project?
Please refer to our deep pour coverage calculator to help determine how much product you will need for your project. Keep in mind this is not an exact science as each project and substrate is unique. We strongly suggest having more than enough product on hand to ensure completion of your project. It's also important that your frame/mold is completely sealed as this is a very thin material. If there are any unsealed cracks or voids, it will find them and the level may drop. Be prepared to add more product if needed.
What is the mix ratio for this epoxy?
Our Pourable Plastic deep pour casting resin is a 2:1 mix by liquid volume (100 Part A to 44 Part B by weight).
How long do I need to mix the epoxy?
We recommend mixing thoroughly for a minimum of 5 minutes. Be sure to scrape the sides and bottom of the container while mixing. Not mixing thoroughly may lead to curing issues. Ideally, you would pour the mixture into a second clean, dry container and mix for an additional 2-3 minutes. We recommend mixing no more than 3 gallons at a time. When mixing 1 gallon or more, use a power mixer set to hand speed.
Why is my project still tacky? How do I fix it?
The epoxy should feel well cured after 72 hours, however, full cure and maximum hardness can take up to 7 days, depending on temperature. If it is still tacky, this likely means it was due to incomplete or inaccurate mixing. Small areas can be improved with an alcohol wash, but larger areas will need to be removed. If it is soft enough, try scraping it off. Otherwise, you will need to sand it down and pour again.
Can I use this resin for coating?
This product is meant for thick pours and casting. This is not a coating application. We recommend this for pours of 1/2" - 2".
What is the best temperature/environment for working with this epoxy?
The ideal working temperature is 65-75°F. When pouring in masses over 2 gallons, we recommend a temperature of 65-70°F to help combat overheating.
How long do I need to wait to pour a second layer?
You can pour the second coat when the first coat is firm but still tacky to the touch (roughly 48 hours, depending on mass and temperature). If it has hardened completely, we suggest a light sanding before pouring the second coat to allow it to bond properly to the surface.
What do I do if my resin is cloudy or has crystallization?
BEFORE you pour, make sure your epoxy is crystal clear. If it is cloudy or crystallization appears, warm up your resin by placing the tightly sealed jugs into warm water or by putting in black trash bags out in the sun until it clears. Be sure to test your product on a sample piece before applying to your final project.
Can pigments be mixed with this resin?
Yes, many of our customers mix colors and pigments with this resin. Do not mix an oil or water-based products with the epoxy as it could cause an undesirable reaction. We always recommend testing your pigment with the epoxy prior to applying to your project to ensure you can achieve your desired color without issues.
How long is the epoxy good for after it has been opened?
If it is sealed back up and stored in a cool, dry place, you can get 1-2 years out of it. However, you will notice the color of the hardener start to yellow. Once mixed, this should clear up. However, please test the mixture before pouring on your final project.
I mixed the product according to the instructions but the mixture is not clear. Should I still pour? Will it clear up?
If your mixture is not crystal clear, you should NOT pour the epoxy on your final project. You can test a sample piece to see how it turns out, but you will likely need to mix a new batch. Please ensure you are mixing at the proper 1:1 ratio thoroughly, and that you are working in an ideal work environment/temperature as mentioned above.
I want to epoxy over patches, bottle caps, photos, etc. How do I keep them from floating in the resin? Do I need a seal coat?
If you are embedding objects to a surface, its important to secure these items to the surface so that they do not float in the flood coat. Its also important to seal over them to prevent an excessive amount of bubbles from holding to or releasing from the object. If it is a paper product, you will need to protect the paper first so that the epoxy does not ruin the paper (see next FAQ). There are a number of ways in which you can do this.
1. Pour a thin seal coat of Table Top Epoxy on the surface. Assuming the seal coat looks good, with no imperfections that would need to be addressed, then you can place the object (bottle caps, patches, etc.) in as soon as the epoxy begins to tack/gel. This is normally 1-3 hours, depending on temperature. This will then tack the object(s) down. Allow to cure then scuff the surface with 320-grit to allow the deep pour to properly adhere. Once sanded, clean the surface thoroughly with IPA 99%.
2. You could pour a seal coat of Table Top Epoxy and allow the epoxy to cure until the surface is hard. You can then use glue on the underside of the objects to secure them in place. We recommend a light sanding of 320 grit sandpaper to scuff the surface. Be sure to thoroughly clean the surface prior to pouring the next layer. We recommend Isopropyl Alcohol 99% (must be 99%) to clean. Once the surface has been sanded and the patches/bottle caps/etc secured with glue, you can then pour the flood coat.
Again, if you are using paper products, see next FAQ on how to protect them.
How can I protect paper products, such as stickers or photos, when embedding them with epoxy?
Paper products need to be sealed before you apply epoxy over them as the epoxy could ruin the paper. For paper based items, we recommend sealing the paper with craft glue. Alternatively, a mixture of Elmers glue and water works well and is more cost effective. Mix 3 parts Elmer’s glue and 1 part water and paint the mixture over the paper products. Allow this seal coat to dry thoroughly before applying epoxy.