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Thread ID: 124956	2012-05-29 23:37:00	Question about 2 part epoxy	Tony (4941)	PC World Chat

Post ID	Timestamp	Content	User
1278305	2012-05-29 23:37:00	I have a project that, to cut directly to the chase, will use a 2-part epoxy filler (or something similar) essentially as a decorative feature. I'm talking something like araldite, knead-it, epifill etc. The end result will be outside and exposed to the weather, i.e. not overcoated in any way. I have been told that 2-part epoxys used like this will (a) yellow and (b) turn chalky over time. So my questions are: How quickly does this happen? Is the chalky thing just a surface effect, i.e. it does it do it and then stop, or is it progressive until the material is destroyed? I'm not so worried about the yellowing, but also, how quickly and to what degree does this happen? Any info from either theoretical knowledge or practical experience would be greatly appreciated.	Tony (4941)
1278306	2012-05-30 00:02:00	I've seen a latex glove filled with epoxy resin and formed into a popular gesture (imagine what you will) that lasted for 10 yrs plus with no visible change, but perhaps the latex protected it and it was left inside so no direct weather exposure either.	dugimodo (138)
1278307	2012-05-30 00:11:00	Yes, and yes, I suspect.	Tony (4941)
1278308	2012-05-30 03:03:00	Hi Tony, google "norski products". I have been using their adhesives & fillers for years now. No failures!	BobM (1138)
1278309	2012-05-30 03:17:00	I had already come across Norski, and it is certainly another possibility. The issue is not failure in a structural or adhesive sense, but rather what it is going to look like. Will I end up with a crumbling chalky, yellowing mess, or just something with a powdery surface? The other issue when choosing a product will be the package size. I am only going to need 100ml or so, so a 1.5 litre pack (e.g.) might be a bit big (not to mention expensive)! That is what makes knead-it araldite and epifill attractive.	Tony (4941)
1278310	2012-05-30 04:43:00	What about using builders bog? It's really fast to set, and is very easily shaped with tools. Once shaped you can seal it and paint it. Epoxy products can be fairly savage items to fall onto if they have sharp edges.	Paul.Cov (425)
1278311	2012-05-30 05:03:00	What about using builders bog? It's really fast to set, and is very easily shaped with tools. Once shaped you can seal it and paint it. Epoxy products can be fairly savage items to fall onto if they have sharp edges.Yes, I've thought of that. I think it still an epoxy though (could well be wrong). I specifically don't want to paint it for reasons that are to long to explain here. It won't have any sharp edges.	Tony (4941)
1278312	2012-05-30 08:24:00	A thought I had today is grout as used for tiles. Not sure of its shrinkage during setting but would be pretty durable outside and if you had a mold it would be easy and fairly cheap with a choice of colours.	mikebartnz (21)
1278313	2012-05-30 09:08:00	In the same vein as grout, how about mortar mixed with exterior-grade PVA? The PVA to hold it together while being moulded	BBCmicro (15761)
1278314	2012-05-30 10:01:00	There are many composites and blends of Epoxy Resins, and their hardners and diluents. Also similar products. Visit Nuplex (www.google.co.nz 130.3-11j0j1.12.0...0.0.bS0XssyZT0M&psj=1&bav=on.2,or.r_gc.r_pw.r_qf.,cf.osb&fp=973c0b8b610b9ba0&biw=1024&bih=472) (pdf search results;specs need be requested) for their blends and related products. Also plenty of research has been done, ofen shear, peel, tensile, rheology, viscosity tests, etc. Search if interested, e.g. under physical or chemical properties. I use to lab test adhesives, of which many were based on the US ASTM (www.astm.org/) and the German DIN (http:) standards. But many I recall are industrial grades (and custom made), and not sure if readily available on the local consumer market, other than general grades and brands. But generally used for construction, and cures well and quite durable. Decoration? How? Polyeurothane, or as mentioned grout, mortar, etc, won't do?	kahawai chaser (3545)
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