i made my own viv stack and i sealed them all with clear (in your case white) bathroom sealant from my local pound store there is sum fumes i just dint put any reptiles in their for few hrs and left door open

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My snakes1.1 boa's 0.0.2 corn snakes 0.0.1 j.c.p

my lizards2.1 Beardies 1.0 yemen chameleon 0.0 scorpian

Good for you, lol another ramdom comment

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R.I.P Steve Irwin and all other amazing Herpetologists

is (PU) polyurethene sealer ok for vivariums, the type that bonds auto glass in?
its very strong and airdrying not 2 part so it doesn't smell much if at all
available in black , white or gray

if you want to use clear sealer and cover the chips, paint them in first them go over with the clear?

silicon sealant. it stinks at first then after 24 hours its fine

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all bathroom sealent has anti fungisides in them these days.
frame sealent might be different but i doubt it.
not the sort of stuff for a fish tank cos it leaches into the water but for a leo tank i should think it will be fine, once it has dried out.