Yes, I'd wait at least 2 weeks to make sure there are NO fumes (odors) off-gassing that could harm your snake. Many adhesives are non-toxic only AFTER they're fully dry- like with using aquarium silicone sealant, it's gives off very irritating fumes until it's fully dry, & if it's put on too thick, it takes much longer to cure. Not sure about Lexel (how long it takes), as I've never used it- just something to keep in mind though. And of course, adhesives are sticky when they aren't full dry too. Sometimes a fan or using a blow dryer will hasten the drying process- but put your snake's health first- don't take a chance by exposing them too soon. Remember that your snake will be locked in, smelling any trace of fumes for "24/7"- it's not like us, where a tiny amount will dissipate in the room, & we can avoid it. So if you can smell it- wait until you can't. (& their nose is better than ours too)