SEM 29372 1K Seam Sealer 10.1 oz Gray, MPN 29372 and Mariners Warehouse SKU 109288, supplies single-component sealing of supported interior and exterior seams, joints and voids. Seal documented compatible seams with gray SEM 1K in a 10.1 oz cartridge. Check the actual metal or primed/painted surface, preparation and separate paint/cure timing before applying.

This gray 1K formula remains flexible and supports documented direct-to-metal seam work after the specified cleaning and abrasion. SEM describes immediate paintability with most solvent-based coatings under its conditions, which is separate from waterborne paint timing and through-cure. Color changes the supplied finish; it does not create a different preparation or cure schedule. A seam-sealer listing does not establish structural panel bonding, universal roof-membrane compatibility or every RV repair application.

Bring the metal/substrate to 70°F / 21°C for one hour before application under the exact TDS. Clean with the documented SEM Solve or XXX Universal Surface Cleaner procedure. Prepare bare metal with P180 or the specified red scuff-pad procedure for properly primed/painted surfaces, then remove dust, reclean and tack as directed. Use a compatible standard caulking gun or the documented 1K pneumatic applicator with the correct tip. Do not apply directly over acid-based self-etching primers or apply those primers directly over this sealer; SEM warns of cracking or blistering. At 70°F / 21°C: working time 5–10 minutes; set time 20–30 minutes; most solvent-based paint window 0–24 hours; waterborne paint after 1 hour. Cure reference: 4 mm per 24 hours. Actual conditions and bead thickness affect results. Tool or finish the seam under the exact instructions and verify continuity before the following coating. Follow the actual label/SDS.

Clear Product Details

Review the 16 oz gel format, specifications and application directions.

Surface Guidance

Check fiberglass, gelcoat and finish suitability before use.

Product Support

Ask about your surface and stain type before ordering.

Shipping & Returns

Review shipping information and return conditions before purchase.

Application Guides

Match the Repair Material to the Substrate and System

Check 29372 by its actual lubricant, cleaner, adhesive-removal or seam-sealer role. Confirm substrate, coating, product formula, preparation, application and package contents before choosing.

Choose the 1K Seam-Sealer Color

SEM 29362 is white, 29372 gray, 29382 beige and 29392 black; each is a separately sold 10.1-ounce 1K seam-sealer cartridge. This listing supplies gray under MPN 29372. These color options share the 1K preparation and timing instructions.

Choose the color after matching the substrate, coating system and intended seam. A color change does not change the acid-based self-etch-primer restriction or make paint-ready timing equivalent to full cure. The separate 2-IN-1 family has its own size, method and TDS. Review the SEM 29362 1K Seam Sealer 10.1 oz White as a separately sold option.

Continue Your Repair, Sealants & Trim Selection

Choose by the actual repair function, substrate, profile and application instructions, then compare exact package contents.

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Frequently Asked Questions

What does SKU 109288 include?
One gray 10.1 oz SEM 29372 cartridge. Dispensing gun, any spray applicator, nozzles, brushes and preparation supplies are separate unless confirmed in the stocked package. This is one retail cartridge, not a 12-cartridge case.
Which color and quantity are supplied?
One gray 10.1 oz cartridge under MPN 29372; not a case.
Is this a two-part product?
No. 1K identifies the single-component seam-sealer formula.
Which substrates are documented?
Properly prepared primed/painted surfaces, bare steel and aluminum under the exact 1K TDS.
When can I paint it?
At 70°F / 21°C, the 1K TDS gives 0–24 hours for most solvent-based paint and 1 hour for waterborne paint, subject to coating compatibility and TDS conditions. Paint timing is separate from full cure.
Can I use it directly over self-etching primer?
Do not use directly over acid-based self-etching primers or apply those primers directly over the sealer; SEM warns of cracking or blistering.
What are the working and cure references?
At 70°F / 21°C: working time 5–10 minutes; set time 20–30 minutes; most solvent-based paint window 0–24 hours; waterborne paint after 1 hour. Cure reference: 4 mm per 24 hours. Actual conditions and bead thickness affect results.
How can I confirm the right selection?
Contact Mariners Warehouse with SKU 109288, MPN 29372, your exact product MPN, component or substrate material, existing coating, application method, working conditions and required package size.

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Need help comparing SEM 29372 1K Seam Sealer 10.1 oz Gray, SKU 109288, MPN 29372? Share your exact product MPN, component or substrate material, existing coating, application method, working conditions and required package size. These details help us understand your selection question before you order.

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