Reply by LesB

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Posted on Is there a spray alternative to Arm R Seal for large projects?

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2201 posts in 3951 days

#1 posted 08-23-2019 08:15 PM

I have not used Arm R Seal but I have had good results from Varathane brand water bases poly. For table tops I like their floor grade finish for its durability. I apply it with a good quality brush however ambient temperature and humidity can be crucial to it’s drying to a smooth finish. Be aware unless it is labeled otherwise water based poly is crystal clear where as oil based is usually amber.

With water based poly I have found that a room temp of close to 70 degrees F is best. That temp allows the finish to flow out smooth before it starts to dry. High temps or Low humidity will cause it to dry faster and may not allow it to level out leaving brush mark ridges. You do have to watch for drips and runs but they are easily spotted because they are white in color. I have only sprayed it from a pressure rattle can so I don’t know how it would work in a HVLP setup but I would expect it to be fine, particularly if you were careful to use multiple light applications. The first coat will definitely need a light sanding. I usually apply 3 or 4 coats rubbing the last coat out after it has cured for several days with white 3M pad and paste wax.
Here is a web site describing how to use water based poly:

-- Les B, Oregon

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