This is what we are doing now at where I'm working. Painting all raw edges and undersides of the laminate countertops with Zinnzer BIN alcohol based shellac primer. The stuff is flammable and kills brain cells, so if you use it, do it outside. It's also pretty runny so a wipe rag is needed. Also clean up is with denatured alcohol, so not easy.
Suggest something safer like a good water based primer. Only reason we are doing the alcohol based shellac primer is stopping formaldehyde out-gassing from the glues in the pressed wood, besides the moisture from the sink. The sink is stainless steel, but it will be caulked. Caulk the the cabinet seams inside and around the pipes if not open back. Also paint the raw unfinished edges as well.
My own sink is an ungodly heavy cast iron two bowl, that's held in place with GE RTV silicone caulk. It's not going anywhere. The counters also have vacuum formed edges that roll under and catch the cabinet.
Last edited by Rustedbird; 06-07-2007 at 03:43 AM.
Reason: Added "in the pressed wood"