Filler and Seam Sealer

item(s): 49013


POR-15 Patch Filler and Seam Sealer

The ultimate filler adhesive. Apply right over rust or bare metal.

Fix that seam or channel with POR-15 Patch. For years our customers have asked us for a thicker version of our world famous POR-15 Rust Preventive Coating, to use for filling seams or holes. Here it is! POR-15 Patch is quite literally POR-15 Rust Preventive Coating in a tube, and it dries as hard as a rock, remains flexible, and once dry is totally impervious to fuels and solvents. This rust hole filler is so tough it may actually add strength to weakened metal, and it won’t absorb moisture and swell like conventional body fillers. Try this rust repair patch yourself. This sandable seam sealer is incredible! Patches holes or cracks in steel, wood, and some plastics.

Use it to:

  • Permanently seal seams
  • Repair loose furniture joints
  • Patch holes in steel, wood or some plastics
  • Fix holes in fuel tanks
  • Bond steel to some plastics, wood or concrete
  • Repair concrete and cinder blocks

- POR-15 Patch Technical Data Sheet

Before POR-15 Patch
Rusted, leaking seam.
Squeeze POR-15 Patch in to crack
Squeeze a bead of POR-15 Patch into seam.
Smooth out the bead of POR-15 Patch over the hole
Press and contour bead into seam. Seam is sealed and ready for a coat of POR-15 Rust Preventive Coating.

WARNING: Cancer -

Customer Reviews

Based on 16 reviews
Kenneth Romney
Worked as expected.

I used the Patch material to repair a leak in my wife's favorite, more than 60 year old, galvavized watering can. It wasn't easy getting it inside the can but there's no leaks and she's a happy girl.

Ken Nelson

This stuff works great for small holes that you can’t really get to to weld. Also for seam sealer with an added layer of protection, rust can’t come back through.

Bradley Thayer

just what i was looking for. Repaired a 'Handy Motorcycle Lift' that had many drill holes from projects gone by. It was either hire a welder at todays rates or search for another method. After a short search and knowing POR reputation I purchased a tube of patch. It worked better than expected. This is an A+ product.

Michael Antrim
Fixed Gas Leak

This product was perfect to fix a gas leak in the level sensor of my motorcycle gas tank.

I trust POR products based on my previous experience with the POR15 coating.

john hauff


Application:POR-15 Patch must be applied to dry surfaces only. Wear protective gloves while using. Remove from skin immediately with POR-15 Solvent or lacquer thinner to prevent temporary staining. Dries to touch in 4-6 hours but full cure may take up to 96 hours depending on thickness applied. Once dry, POR-15 Patch cannot be removed by any solvent. Keep cap and threads clean before re-sealing. Recap tube immediately after application. POR-15 Patch dries to a rock-hard finish and sanding is very difficult, so we don’t recommend use on car exterior parts if a cosmetic finish is desired.