Customers asked us which body filler to use
over POR-15 as most wouldn’t adhere to a cured POR-15
surface. In the past, we told them to rough up the surface
of cured POR-15. Now, after several years of testing and
development, P38 is a product that we know will work with
P38 FILLER has over 30% more resin than other fillers, which
gives it much greater adhesion. This makes it the
recommended choice for applying over POR-15.
P38 has ultra fine particles for perfect feathering of
edges, and is manufactured under vacuum, which eliminates
those pesky air holes you’ve experienced with other fillers.
It’s more flexible, tougher, and able to tolerate higher
temperatures than other fillers (you can even use it in a
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