The method with Seal n Lock is to wash in sand after cleaning. But its designed to seal wet pavers. If your using an acrylic, you cant really do that, because the sand stays wet far longer than the pavers. What I used to do with acrylic sealers is apply sealer, come back later and broom in dry sand then add a light coat of sealer. It was too time intensive. Thats one of the reasons I was sold on SealNLock.