Primers and Spray Foam Roofing
As with most substrates, primer is not always required on spray foam. There are, however, times when you’ll want it handy. As you know, exposed spray foam can get sun damage pretty quickly if left in direct sunlight. Thankfully, P-100 Night Seal Primer has been developed to help with this issue. Here are a couple instances in which P-100 is necessary:
- Prior to coating on top of foam, be sure that the foam is not exposed to the sun for longer than a day. If you will be working on a foam roof for multiple days, you will want to make sure you prime the foam to maintain its integrity. P-100 goes on easily and holds the foam’s integrity, allowing you the time you need to finish the job.
- You may also want to consider P-100 in your tie-in lines. Foam does not adhere to silicone, but it will adhere to P-100. The P-100 coat will allow the new foam to adhere to the previously installed foam, allowing you to finish the job the right way.
If you are bidding or coating spray foam roofs in the near future, you may want to reach out to your Regional Manager for details on this primer. Our online primer guide is very helpful, but since spray foam can get complicated, your Regional Manager may be your best resource for these roofs.
Please join us next week as we look into primer usage on single play roofs!