West Clear over MAS?

Submitted bydaviddewitt onFri, 07/10/2020 - 10:39

I am in the process of building a CNC Vember and used MAS LV epoxy for the layup and initial fill coat.  This is the second boat I have built using MAS recently.  While I love the ease of wet out, the bubbles are driving me crazy. On this particular boat I applied an initial seal coat and let the boat cure overnight.   The layup was performed at a constant 75 degrees (as measured by a digital thermometer sitting adjacent to the boat).   The first fill coat was applied by brush (using Nick’s suggested technique) according to the cotton swap test.  While I tipped off the fill coat with a light horizontal pass from dry to wet and went over the boat with a heat gun, I still ended up with a zillion tiny bubbles.  Yes, they can be sanded out without that much work but ...

For the second fill coat I am thinking about switching back to West 105 with 207 special clear hardener.   I used this epoxy on a cedar canoe many years ago and did not have any problems with bubbles.

Does anyone know why this combination (West over MAS) would be a problem?

JayBabina

Fri, 07/10/2020 - 11:53

Once epoxy hardens it's inert. No reaction or compatibility problems will occur. Just wash the surface of any blush that might be on it with a little soap and water and wipe dry with paper towels. I use those kitchen abrasive pads. I have used many different brands of epoxy on top of other brands with no problems unless there was blush on the surface.

Bubbles are usually caused by a rising temperature squeezing the wood fibers releasing air. Not only constant temp is needed but you need to bring that kayak up to temperature many hours before you start coating. Since yours is coated, you will not have to worry about that but I am still cautious with pre-heating the boat never-the-less. That heat gun technique you describe would make me a bit nervous. I always raised the temp in the shop fairly warm for several hours and actually back it down a bit when I started.

 

daviddewitt

Fri, 07/10/2020 - 19:32

Thanks.  Will go ahead with West Clear 

As for the heat gun.  Have you not seen the video of Nick Schade taking his propane torch to his freshly applied epoxy?  That is scary.  I use a heat gun frequently as a tool when bending wood (not just on strip kayaks).

I remain skeptical about the source of all the bubbles.  With the boat well sealed they did not emerge from the the wood itself. This boat has literally almost no gaps between strips.  The boat and the epoxy were all at a constant 75 degrees both before and during throughout the process.  Our shop does not have AC so it is not possible to lower the temperature.

That said, as a scientist, I intend to run out a set of controlled experiments in my house where we do have AC as well as heat.   My working hypothesis is that they are a by product of the curing process of the MAS epoxy itself.  Stay tuned. 

Just see the main caption here that says something to us about West Clear over MAS, so if you are willing to know what this is then that site has some details here being shared with us now. You can try for cv services UK as that was a good site for work.

Pretty good post. I just stumbled upon your blog and wanted to say that I have really enjoyed reading your blog posts. Any way I’ll be subscribing to your feed and I hope you post again soon. Dentitox Pro

This is a fabulous post I seen because of offer it. It is really what I expected to see trust in future you will continue in sharing such a mind boggling post Meticore

It should be noted that whilst ordering papers for sale at paper writing service, you can get unkind attitude. In case you feel that the bureau is trying to cheat you, don't buy term paper from it. Exipure Review 2022

It is perfect time to make some plans for the future and it is time to be happy. I’ve read this post and if I could I desire to suggest you few interesting things or tips. Perhaps you could write next articles referring to this article. I want to read more things about it! Resurge Review 2022

I am a new user of this site so here i saw multiple articles and posts posted by this site,I curious more interest in some of them hope you will give more information on this topics in your next articles. SynoGut

I wanted to thank you for this great read!! I definitely enjoying every little bit of it I have you bookmarked to check out new stuff you post. Blooket

Nice blog and absolutely outstanding. You can do something much better but i still say this perfect.Keep trying for the best. Kahoot!+

Truly, this article is really one of the very best in the history of articles. I am a antique ’Article’ collector and I sometimes read some new articles if I find them interesting. And I found this one pretty fascinating and it should go into my collection. Very good work! Christmas Words