MAS Epoxy low viscosity resin contains a superior blend of low molecular weight epoxy resin and reactive dilutents, resulting in an easy-flowing reliable system with low drip and no blush.
Use for barrier coatings, laminating, and bonding. Low viscosity epoxy provides complete wet out of fiber reinforced fabrics, reducing the potential for voids and other imperfections. Modify with fillers such as wood powder of colloidal silica for filling and fairing compound applications.
MAS epoxy is typically used at room temperatures using your choice of hardeners (MAS recommends using their own Fast, Medium or Slow) in a 2 parts resin to 1 part hardener mix ratio. This versatile resin system can be used in a wide variety of applications, including boat hulls and structures, as well as laminating and bonding of nearly all materials.
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Amine blush is a waxy layer that forms during the cure process of most epoxy resins. No blush is critical if you intend to apply additional epoxy or varnish over it. MAS epoxy won't blush as long as it is applied in anything under 98% humidity.
Specific Gravity at 77 degrees F: 1.08 - 1.13
Density (lb/gal) at 77 degrees F: 9.6
Flash Point (closed cap): 200 degrees F
Percent Reactive Solids: 100
Mixed Viscosity with MAS Hardener: 550-650 cps
Mix Ratio: 2:1 Resin to Hardener
Use protective gloves when working with this product. Use soap and water or white vinegar to clean your hands. Use Denatured Alcohol to clean your tools.
can you gel coat over mas epoxy
You can apply gel coat over epoxy but will need to be sure it is very clean, wash and scrub with water, sand and clean a couple times with acetone. Gelcoat is best (less work) on polyester resin.
JD Tech Team
I am replacing the teak and holly plywood cabin sole in my Cal 33. I need to coat the underside of the plywood sections and all the edges to protect from moisture before setting the pieces in place. Would this product be a good choice for this use?
Yes, you could but it will sit on the surface of the plywood. Better to use Totalboat Clear Penetrating Epoxy first it will penetrate the fibers of the wood and seal it.
I am considering using this product as the top coat on my home bar that I built. I am looking for something durable, water and chemical resistant, and that can be brushed on. Will this product be able to do what I am looking for? Also, if you think it will work, what hardener would you recommend. My thoughts were to use the slow hardener, that way I have plenty of time to make the application.
Yes, this will work but will take a number of coats if you want to build it up to a thick coating. The slow hardener will give you 23 minutes of working time at 77 degrees.
can I use West System episize glass fiber, with MAS low viscosity epoxy resin? I need 6 oz. 60" wide cloth.
Sorry, I do not know for sure.
I reviewed the spec sheet on this West system product. it seems to be simply fiberglass. There should be no problem with combining the two. Good luck!
You can use any west system filler or glass product.They are made for "epoxy", not a special manufacture.I've used mas for years and have neverhad any problem.They have a great tech support.I had a question a few years ago and ended up speaking to the head chemist!
I've used MAS epoxy with several different types of glass all with excellent results. If working large pieces use the slow hardener.
The two are perfectly compatible
Is MAS epoxy food safe? Can you use it to laminate cutting boards or for a surface where food is prepared or eaten? Thank you.
No, Low Viscosity Epoxy Resin is not considered "food safe". MAS sells another epoxy product for lining potable water tanks that is "food safe".
I recommend following the other answer regarding the food safe stuff.
I cannot answer this question, we do not use this product for that purpose.
I have only used the epoxy for boatbuilding so I can't directly answer your question. I would write the MAS technical help folks. They have always been very responsive to the questions I have asked.
Can I use this to coat my gunwale and outside shear rail of my driftboat before varnish. No fiberglass just a coat of epoxy?
Yes. I built an eleven foot dinghy and only the lower portions of the hull were fiberglassed and the rest of the dinghy was covered with three coats of the epoxy resin. The epoxy must be coated with a UV blocking varnish for protection. All epoxies will eventually break down with prolonged UV exposure.
MarkI cannot answer your question. I suggest you call the manufacture.
I just received mas low viscosity resin and slow hardner. What is the re coat time?
My understanding is that can be re coated at any time, because it does not get. An oil sheen on it. That,s the advantage of using MAS I have re coated at different time intervals and have experienced no problem.
24 hours for sure. I wait 2 days til it hardens so you can sand between coats.
Depends a bit on temperature, but I normally allow 12 hours.
In my experience, 24 hours works best. But you might want to check around with other users. It's a great product.
I've been mixing MAS epoxy by weight at a 2:1 ratio. But, i'm about out of hardener but have a fair amount of resin still. Should the ratio be changed when measuring by weight? If so, by what amount?
MAS products are sold by volume, not weight. The instructions say to use "2 parts resin to one part hardener" and this means by volume, not by weight. So yes, you should alter the ratios if you measure by weight since the densities are not exactly the same. It's a good idea to stick to the manufacturer's proportions when mixing reactive 100% solids systems like MAS, but you're not far off if you measure by weight because the densities aren't a lot different. Get some of the Jamestown 8oz cups or paint pots, both of which are marked with (fluid) ounces ie volume measuring units and thus make measuring by volume pretty easy.
Some more tips: Don't ever mix a large volume of epoxy and hardner at one time and keep it in the mixing cup as you apply. I'd suggest never more than a total of 8oz of mixed resin-hardener because of the risk of exotherm, which is self-heating from the cure reaction which will feed back onto itself, raise the temperature of the stuff in the cup thus react more violently and so forth. If you're going to need a lot of mixed resin, get it mixed and loosely distributed onto the work surface immediately, then spread it more carefully afterwards. Don't keep it in a single mass. And be sure, when mixing, to thoroughly scrape the bottom and sides of the mixing cup because sometimes there's a film of pure resin or hardener clinging there which doesn't get mixed in properly. Consciously scrape you mixing tool over ever bit of the surfaces of the mixing cup, and also scrape the mixer itself off on the rim and mix the scrapings into the batch. Uniformity is important!IT is reasonably easy to accurately measure larger quantities by ounces in Jamestown cups or mixing bowls but for small batches I always use weight. You will be off somewhat in the rations because of the difference in density but the system can tolerate some error, as you have found. So use volume for bigger batches, use weight for the small stuff. Don't mix too much at one time and if you do, quickly spread it around on the work surface so it can't heat up excessively.Thomas S
I don't know. I almost always mix by volume not by weight. When making very small batches I would use the weight method but found the setup to be slower than normal. It may have just been my misperception. Good luck.
Phil---I have had success measuring by both volume and weight....using 2:1. True, they are not exactly the same,but the difference is not enough to affect the outcome, in my experience.Good luck..
We have been using MAS epoxy for years and have always done so by weight. I would recommend staying with the 2:1 ratio 2 parts resin to 1 part hardener.
Stay with the required 2/1 ratio. I did not deliberately change the ratio, but nearing the end of a coat of Epoxy Resin, I had to mix a small amount of Epoxy Resin. I used the same mixing cup and had to tip the cup to get enough depth to mix properly, neglecting thin edge that did not get enough hardener, I poured all of the mix out on the project. The small amount that did not get enough hardener, did not cure. Not wanting to start over, I analyzed want I did and scraped out the areas that did not cure (including the fiberglas), applied a large section of fiberglas patch and using a "small" mixing cup (no tipping) and lots of sanding saved the project.
Is it food safe?
I cannot answer your question, we do not use this product for any food application.
My opinion is no. The real answer should be on the MAS website
I don't know I don't work in that area.
Is this product sold as a "kit" with resin and hardener included, or do I have to buy the hardener separately? If so, I don't see it listed anywhere.
Hello, Dana.MAS has three levels of hardener: slow speed, medium speed and you'd better be quick! The really nice features of MAS epoxy is that it doesn't blush on curing and the mixing ratio of resin to hardener is a real simple two parts resin to one part hardener.They also have more than one type of resin for different applications. I've used other brands of marine grade epoxy MAS is the best all around.
No it is not a "kit". You must by the resin, hardener, and pump kit. And be sure to order the correct ratio of 2 parts resin to 1 part hardener. The pump kit dispenses "two to one".
The resin requires a hardener...it sells it separately under slow medium or fast...depending on outside temperature and how quickly you want it to harden will dictate your selection. MAS makes a great product.
It is listed on a different page. Was confusing to me as well. Suggest call them on phone. Good luck
You have to buy resin and hardener seperately. Remember that it is 2:1 resin to hardener by volume. ie 2 ounces resin to 1 ounce hardener
On the Jamestown Distributors website I did not see it sold as a kit, I bought mine as 2 seperate items. The MAS formulation is a 2:1 ratio epxoy to hardner.Andy
You will need to buy the hardener separately, in a size half the volume of the resin.
When I bought this through JD, I bought them separately. You need both the resin and the hardener.
Dana you buy the resin and hardener separately--- that way you can choose the regular or fast set depending on your project
Works very well, the pot life and working times are as stated.
Fair Have Michigan
great, easy to work with epoxy
I use this for sailboat repairs, always consistent results.MIX IT WELL
MAS Low Viscostiy Epoxi Resin
Even if you can't heat your workshop to plus 60 degree F, you will get good fiberglass penetration and easy use. If to cold use heat gun and you still have plenty of time before curing.
Englewood, New Jersey
my favorite resin
repairing a small pram
Works as advertised, yet another great epoxy.
Effective in taping and filleting a pair of "stitch and glue" outriggers.
Excellent for repairing delaminations
I had multiple small areas of surface (non-structural) delamination to repair. I drilled #30 holes at opposite ends of the each area, then applied heat and pressure to set the glass back down. Then I used a 6cc plastic veterinary syringe, a tight fit into one #30 hole, to force the low-viscosity epoxy into the area until it flowed out the other hole. Finally, I covered the area with a non-stick plastic sheet and used 25# lead shot bags to hold it down until the epoxy set. Using the fast hardener, this was just a few hours.
Wooden Airplane Restorer
delivered on time and as expected
These MAS products have consistant quality, enabling predictability of the outcome.
Unquestionably the best resin for kayaks
Using low visocsity resin allows it to permiate through the fiber glass cloth and create a beautiful transparent finsh that preserves and protects the woods natural beauty. I have tried other resins, none perform as well as MAS low viscosity.
MAS epoxy resin
I use this for making my bamboo fly rods... Excellent stuff