Moderator: eaglesdare
GPW wrote:I'd be sure to test those bullet proof coatings First ...
eaglesdare wrote:Q: How do I protect foam when it is outdoors?
A: The cheapest and easiest coating is outdoor latex house paint. If the foam will be in an area where people and animals won't be banging into it, it will outlast painted wood because shrinkage, expansion, or rot will not occur with polystyrene foam, as it does with wood. We now have a complete Foam Coating System with several options for protecting your foam. The Foam Coat is a concrete based product, so when applied thick enough (at least .5" thick) it will be very difficult to break or crack. I always recommend adding some Boost liquid fortifier, as it will greatly strengthen and weatherproof the Foam Coat. The Foam Coat is slightly porous, so use an exterior paint, or other sealer over the Foam Coat. If you add Bounce instead of Boost, it will make a flexible waterproof coating. You can also stucco over the foam coat which has been formulated to adhere well to foam. We also offer Grit in either medium or coarse, which adds stone texture to foam. If you are looking for super strength you can fiberglass and epoxy the foam. Many kayaks and windsurfers are made this way. Never use resin directly on the foam, as it will dissolve polystyrene. You can use a coating of white glue as an insulating barrier from the resin
this leads me to believe that the epoxy/fiberglass is stronger than these products. not to say these products will not do the job for what we want. but it does say if you want super strenght use epoxy/fiberglass.
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