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® 29472 is a 2-in-1 seam sealer supplied in a 9.5 oz gray tube, designed for rapid sealing of panel joints and seams before final finishing. It provides a flexible, paint-ready film that bonds to a wide range of substrates commonly encountered in body shop repairs.
Key performance features include a work time of 20-40 minutes at 70 °F (21 °C), allowing ample flash time for application and tooling. The sealant cures to a 4 mm thickness within 24 hours under the same conditions, delivering a durable bond that can be sanded or primed without additional waiting. Compatible substrates cover aluminum, steel, fiberglass, wood, plastic, concrete, OEM panels, primer coats, and SMC, ensuring versatility across repair projects.
Safety handling requires full PPE: eye protection, chemical-resistant gloves, protective clothing, and a respirator in confined spaces. The material has a flash point of 98 °C and is classified with acute toxicity, skin corrosion, eye damage, respiratory irritation, carcinogenicity, aquatic toxicity, organ toxicity, reproductive toxicity, and specific H-statements (H315, H319, H335, H351). Adequate ventilation and immediate first-aid measures-fresh air for inhalation exposure, thorough water rinse for skin contact, and prolonged eye irrigation-are mandatory.
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
- Clean and dry the substrate; ensure surfaces such as aluminum, steel, fiberglass, wood, plastic, concrete, OEM parts, primer, or SMC are free of contaminants.
- Apply a uniform first coat of SEM® 29472 2-in-1 Seam Sealer with a brush, roller, or spray gun.
- Work within the specified work time of 20-40 minutes at 70 °F (21 °C) to maintain proper flash time.
- Allow the first coat to cure for 24 hours (4 mm thickness) at 70 °F (21 °C) and 50 % relative humidity before handling or applying additional coats.
- If a second coat is required, repeat application after the initial cure; ensure each subsequent coat also cures 24 hours under the same conditions.
Compatibility
Compatible paint systems: Solvent.
Specifications
| Part No. | 29472 |
|---|---|
| Product Line | SEM |
| MFR Model | 29472 |
| Standard/Approvals | California Pro65 Warning: Cancer | GHS and OSHA Hazard |
| Manufacturer | SEM |
| UPC | 646786294723 |
| Brand | SEM® |
| 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 | Gray |
| 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% RH
- Work Time
- 20-40 min @ 70°F (21°C)
- Substrate Compatibility
- 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 SEM® 29472 2-in-1 Seam Sealer be applied to?
The sealer is compatible with aluminum, concrete, fiberglass, OEM plastics, primer-coated surfaces, SMC, steel, and wood.
How long does it take for the seam sealer to cure?
Cure time is 24 hours at 70 °F (21 °C) with 50 % relative humidity for a 4 mm film thickness.
What is the usable work (flash) time?
The product remains workable for 20-40 minutes at 70 °F (21 °C).
What personal protective equipment is required when handling this product?
Wear eye protection, chemical-resistant gloves, protective clothing, and a respirator as indicated on the SDS.
Are there any special safety hazards I should be aware of?
The sealer is classified for acute toxicity, aquatic toxicity, carcinogenicity, eye damage, organ toxicity, reproductive toxicity, respiratory irritation, and skin corrosion. The flash point is 98 °C.
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 long sleeves), and a suitable respirator when handling this product. It can cause serious eye damage, skin burns, respiratory irritation, and is toxic if swallowed or inhaled; it is also classified as a carcinogen and harmful to aquatic life. Use only in well-ventilated areas and avoid any skin or eye contact. 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].
