Built for the job.
2-in-1 seam sealer is a beadable and sprayable, high performance, one component MSP seam sealer for interior or exterior seams and OEM sprayed sound dampening pads.
SEM 29482 2-in-1 Seam Sealer is a beige, liquid sealant supplied in a 9.5 oz tube, designed for rapid sealing of seams and joints on automotive bodies before final finishing. It provides a single-component solution that bonds to a wide range of substrates, making it suitable for panel repair, filler blending, and pre-paint preparation.
The sealant offers a work time of 20-40 minutes at 70 °F (21 °C), allowing ample flash time for adjustment before curing. Full cure is achieved in 24 hours for a 4 mm film thickness under the same temperature conditions, ensuring a durable, moisture-resistant bond. Compatible substrates include aluminum, steel, fiberglass, wood, plastic, concrete, OEM panels, primer coats, and SMC composites.
Handling requires strict PPE: eye protection, chemical-resistant gloves, protective clothing, and a respirator due to acute toxicity, skin corrosion, and respiratory hazards. Use in a well-ventilated area; the material has a flash point of 98 °C and is classified under GHS hazard categories for carcinogenicity, aquatic toxicity, and organ toxicity.
Why Pros Choose SEM SEM
- OEM recommended
- Direct to metal
- Paintable immediately with most solvent based coatings
- Remains flexible without shrinking or cracking
- Colors match many OEM sealers
- Optimal working time
- Corrosion resistant
- Resistance weldable
- Excellent adhesion
- Contains no solvents or isocyanates
Application Guide
- Ensure the substrate (aluminum, steel, wood, fiberglass, plastic, concrete, primer, SMC, OEM) is clean, dry, and free of loose material.
- Shake the tube thoroughly; no mixing ratio is required for this 2-in-1 liquid product.
- Apply the seam sealer within the work window of 20-40 minutes at 70 °F (21 °C).
- Allow the film to flash dry for the remainder of the work time before handling or applying additional coats.
- Full cure to achieve 4 mm thickness requires 24 hours at 70 °F (21 °C) and 50 % relative humidity.
Compatibility
Compatible paint systems: Solvent.
Specifications
| Part No. | 29482 |
|---|---|
| Product Line | SEM |
| MFR Model | 29482 |
| Standard/Approvals | California Pro65 Warning: Cancer | GHS and OSHA Hazard |
| Manufacturer | SEM |
| UPC | 646786294822 |
| Brand | SEM® |
| Maximum Sale Quantity | 12 |
| Maximum Sale Day | 7 |
| Applicable Materials | Aluminum, Steel, Fiberglass, SMC, Glass, Concrete, Wood, Plastic |
| Composition | 13 to 30% Calcium Carbonate, 13 to 30% 1,2-benzenedicarboxylic Acid, Bis(2-propylheptyl)Ester,>=1.5-<3% N-(3-(Trimethoxysilyl)Propyl)Ethylenediamine, 1 to 1.5% Titanium Dioxide |
| Application Time | 20 to 40 min |
| Paintable (Y/N) | Y |
| Sprayable (Y/N) | Y |
| Component | 1K |
| Odor/Scent | Characteristic |
| Color | Beige |
| Setting Time | 1 hr |
| Flash Point | 98 deg C |
| Container Size (oz) | 9.5 |
| Container Type | Tube |
| Form | Liquid |
| Curing Time | 24 hr |
- Cure Time
- 4 mm / 24 hr @ 70°F (21°C) / 50% HR
- Work Time
- 20-40 min @ 70°F (21°C)
- Compatible Substrates
- Aluminum, concrete, fiberglass, OEM, plastic, primer, SMC, steel, wood
About SEM
SEM Products specializes in paint adhesion systems, flexible coatings, and plastic repair — the go-to choice for interior and trim refinishing.
Frequently Asked Questions
What substrates can I apply SEM® 29482 2-in-1 Seam Sealer to?
The sealer is compatible with aluminum, concrete, fiberglass, OEM plastic, primer, SMC, steel and wood.
How long does the seam sealer take to cure?
At 70 °F (21 °C) and 50 % relative humidity, a 4 mm film reaches full cure in 24 hours.
What personal protective equipment is required when handling this product?
Wear eye protection, chemical-resistant gloves, protective clothing and a respirator as recommended by the SDS.
Can I sand or paint over the cured seam sealer?
Yes. After the 24-hour cure period, the surface can be sanded and primed/painted using standard body shop procedures.
Documents & Safety
- Safety Data Sheet (SDS)
- sem_29462_catalog.pdf
- sem_29462_specification_sheet.pdf
- COLOR_COAT_13003_Catalog.pdf
Signal Word: Danger. Wear safety glasses or goggles, chemical-resistant gloves, protective clothing (coveralls or apron), and a respirator rated for organic vapors. This product can cause serious eye injury, skin burns, respiratory irritation, and is toxic if inhaled or swallowed; it is also classified as a carcinogen and hazardous to aquatic life. Use in a well-ventilated area and avoid any contact with skin, eyes, or clothing. Always refer to the full SDS before use.
Why Buy from autofxmart
- Authorized distributor — authentic, factory-fresh stock.
- Fast US shipping — most orders ship within 1 business day.
- 30-day returns — buy with confidence.
- Pro-shop pricing — bulk discounts available on request.
- Expert support — questions? Email us at [email protected].
