What you want to do is dig a trench around your ob slab, fill the bottom with crash rock, lay some sloted drain pipe and run it off to a storm drain, cover sloted drain tube with more crashed rock and then soil. Then for sealing wait till the slab is fully dried, mix the frisrt coat 1 3rd sealer and 2 parts solvent and put it on thick, if the slab is old acid etch it before sealing but this should be done any way as it opens up the concreate's pours for deep sealer penetration. Next coat add some glass beeds or anti slip to the final coat undiluted and your good to go
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As I have lashings of acrylic paint on hand, will that be ok to use to seal the concrete or is there something special about acrylic concrete paint?
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Umm yes there is lol, one seals and the one you have is a paint which will make it look nice but thats it.