Waterproof sealant before paint.

Questions & AnswersCategory: Paint Preparation QuestionsWaterproof sealant before paint.
Greg Hartwig asked 10 years ago

It was suggested that I spray or roll a waterproofing material on my T-111 siding before I paint. Will this make the new paint adhere good or will the paint tend to have less grip!

1 Answers
JT Creations, LLC answered.

A waterproofing material is never good for more than a year. I have heard this recommendation all my life and have never heard it from a paint manufacturer.

My suggestion is, if painting, prime with a top quality primer then apply 2 coats of high quality finish. If staining, apply 2 coats now and 2 more in 18 months. After that you can generally count of staining every 24 months in your part of the world.