Is this sealant safe?

[Blacksupra94]

I found some grout sealant at home and i'm unsure if it's safe to use on my work in progress gecko set up...
http://www.custombuildingproducts.c...are/newsealer/GroutTile.aspx?user=dis&lang=en

Also, would it make more sense to apply the sealant before acrylic paint or after the paint?