Can you paint over thompsons water sealer. I cant remember what it is off the top of my head but its on the container. Allow a minimum of 3 days drying time before applying oil based paint over thompsons waterseal waterproofer plus masonry protector. They have a line of products called deckscapes. This video will save you a lot of time and money.
Not sure what you mean by polyurethene based paints since there are oil based poly and water based poly both. No you cant use water seal over paint because the whole idea behind the sealer is that it does penetrate wood and paint prohibits it from doing its job. Allow 45 days drying time before applying latex paint over thompsons waterseal waterproofer plus masonry protector. But you can put latex paint over thompsons waterseal clear multi surface waterproofer.
Length of protection will vary depending on environment. For best results prime the water sealed wood first. Its main ingredient is paraffin. Yes you can paint over thompsons although thompsons does recommend a waiting period.
See what the best way is to. And painter worth his salt will be doing some sanding prep no matter what the condition of the old thompsons or other seal anyway. Anyone who cant just give an answer without resorting to name calling and personal attacks is a jackass. Painting over thompson water seal.
Cant get your pump garden sprayer to spray deck sealer like thompson water sealer. It looks cool when the water beads up but it does not penetrate to protect the wood. Use either a latex based or an oil based primer as your first coat of paint before applying the finishing coat. I dont see anything in the bm or any other exterior stain deck preparation about sanding the wood and ive never seen or even heard of a stain failure.
Now as far as painting goes i would think long and hard about painting any interior floor. First of all thompsons is the worst thing you can do to wood. Pressure treated is iffy if its new obviously but i dont see how sanding would help that issue as it would be cutting into more and better pressure treating. Find a sherwin williams dealer near you.