DIY PVC Fake wood needs a protective coating

daybr4ke

Feeder Fish
Aug 21, 2017
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Hi! I've been searching for a product to coat some fake logs I made based on threads on a pair of amphibian forums. The basic composure is PVC bent with heat and textured with a knife and drill, then Painted with Non-toxic Acrylic paint, which was recommended in the thread. It said to use either Water-based epoxy sealant for terrestrial use or "Aquaculture-safe Sealant" for aquatic use. Since I had plans to make a paludarium at some point, I decided I wanted to get the Aquaculture-safe sealant so I could make use of the fake logs again in the paludarium. I ended up visiting a local vivarium supplier, who stated they used to carry it, but no longer do, and referred me to a local aquarium supply store. They carried an item that matched the name, but it was an opaque caulk sort of product made mostly of silicone. He said he didn't know how/where to get exactly what I need, and recommended I ask on here, so here I am!
Basically what I need is a dippable, sprayable or paint-on coating that is safe for fish and/or frogs that is clear, relatively tough, and not overly expensive. One roadblock that may make things difficult or impossible is the fact that both the inside and outside must be coated because I painted the inside, which is why I'm kinda hoping there's some way I can dip it. Thank you in advance for any help, I hate joining forums just to pester people with a single question, but googling "aquaculture-safe sealant" produced mostly sealing products for use on concrete and/or wood for large projects, and I'm starting to feel like giving up and just getting some ghostwood instead. I'm sorry if there's no product that fills all or even some of these requirements. Thanks for reading!
 

daybr4ke

Feeder Fish
Aug 21, 2017
4
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Thanks so much for the reply! I emailed them via their website asking which products would be suitable. They said the 1618 clear coat would be best, as they use it as coating over a fake coral made from another one of their products(307 lite).
 

pacu mom

Goliath Tigerfish
MFK Member
Jun 8, 2006
3,329
2,153
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northern CA
It is a clear epoxy. Follow their mixing instructions to avoid bubbles which turn into pinhole voids. It is also self-leveling and tends to run down vertical surfaces. If you need to reapply, lightly sand the area first or the epoxy will just puddle. I had quite a learning curve when using the stuff. The tech said to paint on thin coats. Slathering it on thick works best for me--I can dissipate any bubbles quickly. Having mixed 12 - 15 gallons of the stuff, I developed a system that works for me.
 

daybr4ke

Feeder Fish
Aug 21, 2017
4
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1
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Wow, thanks! This is great, since your personally experience should save me a little trial and error. However, I am experiencing some slight problems: The project I am working on is meant to be a low budget Vivarium, a pretty tall tank around 40 gallons capacity with a naturalistic backing, fully planted for around 60$ total investment. It uses 2 sterilite bins(90qt), silicone caulking and expanding foam. I was hoping to mount one of my fake logs into the background, but the epoxy from polygem will cost more than the rest of the tank itself, and I feel this would defeat the purpose of this endeavor. My fake logs aren't very big, and I don't think I need a lot of the stuff to coat them. I don't know if there's another similar product/brand that would work for less money, or if polygem carries a smaller size, but I hope so. Thanks again, and sorry for being problematic.
 

daybr4ke

Feeder Fish
Aug 21, 2017
4
0
1
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A bit ago, I was using silicone caulking to "glue" two sterilite bins together. After working with it a bit and noting the consistency, I decided to try it as a coating on my pvc log. I took my first, fuggliest log and used disposable gloves to smear silicone caulk across the surface. I couldn't find the caulking gun, so I had to use a silicone II tube, which is "anecdotally safe" according to various resources. I'm not going to use this log in the Vivarium, but if it dries and works well I'll likely use the silicone I on the other one I get my hands on the caulking gun.
 
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