3M Urethane Seam Sealer 08368 – White, High Solids, Permanently Flexible, 310 mL Cartridge
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Description
x3M Urethane Seam Sealer 08368 is a high‑solids, single‑component sealant designed for automotive and RV seams and joints. It adheres to bare metal, primed metal, and painted surfaces, and can be smoothed to a featheredge or brushed for a clean finish. Its moisture‑curing chemistry helps it perform across a range of heat and humidity, while its permanently flexible profile resists cracking and shrinking as it cures. Paintable after 30–45 minutes, with a cure time of about 24 hours, this sealer offers a durable seal without relying on solvent‑based formulations.
Key benefits at a glance
- Single‑component formula that adheres well to bare metal, primed metal, and painted surfaces
- Moisture‑curing properties help it perform in warm or humid environments
- Non‑shrinking, non‑cracking, and permanently flexible for long‑lasting joints
- Quick drying: paintable after 30–45 minutes
- Thick consistency that fills larger voids and can be feathered to a smooth edge or brushed
- Designed for professional, industrial applications (not intended for consumer sale)
Real‑world use and application tips
In everyday auto body and RV repair scenarios, this sealant stabilizes seams before paint and exterior finishing. It bonds to metal panels, fenders, roof seams, and frame joints, helping create a unified surface. The texture supports tooling for a featheredge or a brushed finish, depending on your workflow and aesthetic goals.
- Prepare a clean, dry surface and cut the nozzle to the desired bead size.
- Apply with steady pressure to form a consistent bead along the seam.
- Tool to featheredge if a seamless transition is needed, or brush for a textured finish.
- Allow to cure for 24 hours for full strength; paintable after 30–45 minutes.
Note: This product is intended for professional or industrial use. Always follow safety and handling guidelines on the product data sheet.
FAQ
Q: What surfaces does 3M Urethane Seam Sealer 08368 bond to?
A: It adheres well to bare metal, primed metal, and painted surfaces.
Q: How soon can you paint after applying the sealant?
A: Paintable after 30–45 minutes; full cure takes about 24 hours.
Shipping & Return
xReturns Policy
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Shipping
We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.
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