Edited several times to ensure accurate information is posted
not the putty - the paint.
The paint adheres to bare metal like a wolverine on a dead skunk.
The POR-15 paint will flow into the cracks, crevices, pits and holes to seal them
forEVER against further corrosion.
The POR-15 TopCoat is UV stable. But, I suggest after applying the POR-15 paint,
allow it to fully "cure" for 24 hours. Then, abrade it with a green scotchbrite pad or sandpaper
and paint with a UV stable topcoat primer and paint, such as Rust-Oleum, etc.
Whatever you decide to paint your boat with .....
this paint is ROCK HARD after it cures.
You can use the waterproof epoxy putty (like JB Weld, etc) to fill the larger holes prior to painting with POR-15.
Any pin holes WILL leak a bit, so, they should be covered on the outside with masking tape.
The easiest way to do the transom is to stand the boat up on its backside and get the transom level.
Probably up beside your house or a tree, and tie it up securely.
Even if you get this paint to puddle 1/8 - 1/4" in places, IT WILL CURE ROCK SOLID HARD !!!
It "cures" from moisture in the air - it does not "dry" from solvent evaporation.
This urethane epoxy "paint" is nothing like you have ever seen before - - - - unless you have actually used it.
It is not a Polyester Resin, it is not a two part epoxy.... Although it is pricey, it will do the job.
(and no, I have NO interest in this company) I have used it several times and it does the job.
I will be doing some rusty metal work on my 1997 Dodge van where the drip edge in the back has rusted out.
I will be using this product, some fiberglass cloth and bondo to get the job done.
To use, estimate the area to be painted and only pour that amount into a separate can.
DO NOT pour any unused paint back into the original can !! Discard it.
If you leave the lid off the original can, or only partly closed, the entire contents of the POR-15
WILL CURE ROCK SOLID HARD. As will the brushes that you use.
Once the original can is opened, the shelf life kicks in. Once exposed to the air, just that small
amount of moisture starts the curing process inside the can. You have approximately 3 months
to use the remainder of the paint or it will turn ROCK SOLID HARD inside the can.
From the POR-15 website:
POR-15® Top Coat is a direct-to-metal coating designed to work incredibly
well in all applications where there is a need to preserve substrates susceptible to corrosion.
Under exposure to sunlight and weather POR-15® Top Coat has exceptional long-term gloss and color retention.
POR-15® Top Coat can be applied directly to metal substrates, with no need for a primer or undercoat,
and is formulated to form a robust barrier that sheds moisture to provide long lasting protection.
POR-15® Top Coat has excellent adhesion and when used over POR-15® RUST PREVENTIVE COATING
the products create a system that works to provide a permanent barrier to corrosion.
Jus my dos centavos