Well I promised I would post a brief review of the Dupont Stone-Tech Saltwater Resistant Sealer once I had an opportunity to apply. With all of the rainy and cold weather we've had, I haven't had the chance to get the process started until this morning.
Below is the initial product application review (fieldstone coping only). Performance and aesthetic reviews to follow in subsequent updates.
MAN THIS STUFF IS THIN! That's the first thing that came to my mind. It's almost water-like viscosity when I was expecting something a little more like other paver sealers I have used in the past. I ordered the 1 gallon jug from Amazon and got it at a discount to the local distributor. The product is milky white in color and has very little noticeable odor (being applied outdoors).
The product calls for application with a nylon bristle brush or a roller. I used a 6" short nap roller so I could control the "spread". I tried with the brush but the stuff is so thin it barely held on to the bristles. A lot of the product also ended up running in the space between the pavers on the deck and the coping.
The product rolled on fairly easily but I had to be careful not to "roll" too far over the side of the coping on the pool side because of the quick spread. Some of the product did ultimately drip into the pool - I wish I could have gotten this done earlier just for that reason. I am not certain how I am going to apply to the front of the coping without getting some product in the water - I guess I will have to be careful and maybe use a hard plastic barrier.
The initial results after about 30 minutes did not give me the impression it's going to be a high-gloss finish. Looks more like an eggshell finish but future reviews will flesh all of those details out.
The cure time for this product is 72 hours - so that means I am waiting until Sunday to do any swimming or cleaning - just as well - the temps here are dropping back into the high 70's/low 50's for a few days so I can wait.
The product calls for a second coat after the first where de-icing products will be used. Even though we don't use de-icers in my neck of the woods, for my app. 80' of 2' coping I used probably a 3rd of the gallon, so I think a second coat will be in order in any case.
I'm not sure if this product is any better than your favorite paver/concrete sealer for non-salt water areas, but with respect to the salt-water resistancy I am in it for the peace of mind and the price was reasonable.
Let me know if anyone has questions.