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Outdoor Sealants? Answered

To seal the papier mache for outdoor use, is there a preferred sealant? What should we look for in selecting a sealant for outdoor use? I have in mind some projects for holiday decor that would be outside for several weeks at a time. I'd love to find something that could withstand the weather and sun for longer periods, so that papier mache might be used for garden art.

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MikaelaHolmesBest Answer (author)2017-09-18

From my reading, it seems like marine varnish (something like this: https://www.amazon.com/Rust-Oleum-207008-Marine-Varnish-1-Quart/dp/B000C011CE/ref=pd_lpo_vtph_60_bs_img_1?_encoding=UTF8&psc;=1&refRID;=EV30B08DZPTTCGANHTMA) or roof sealant (https://www.amazon.com/Sashco-Through-Sealant-Quart-Container/dp/B00110A8D2/ref=sr_1_1_sspa?ie=UTF8&qid;=1505754776&sr;=8-1-spons&keywords;=through%2Bthe%2Broof%2Bsealant%2Bclear&th;=1) is your best bet. These are fairly noxious, but they just work better than anything water based if you really want to protect your work from the elements. This is a good, if somewhat long winded, post about a very thorough experiment on the subject: http://www.papiermache.co.uk/articles/waterproofing-papier-mache/1/

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