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® 29462 is a 2-in-1 seam sealer supplied in a 9.5 oz white liquid tube, designed for sealing and reinforcing joints on automotive panels, structural repairs, and filler applications where a fast-setting, high-strength seal is required.
The formulation cures to a 4 mm skin depth within 24 hours at 70 °F (21 °C) and 50 % relative humidity, providing reliable strength for downstream sanding or painting. Work time ranges from 20 to 40 minutes under the same conditions, allowing ample flash time for complex seams. It adheres to a broad range of substrates-including aluminum, steel, fiberglass, wood, plastic, concrete, OEM primers, and SMC-eliminating the need for separate bonding agents.
Due to acute toxicity, skin corrosion, eye damage, and respiratory hazards, appropriate PPE is mandatory: chemical-resistant gloves, safety goggles, protective clothing, and a respirator in well-ventilated areas. Follow H315, H319, H335, and H351 first-aid instructions for exposure incidents.
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 the substrate (aluminum, steel, fiberglass, wood, etc.) of all dust, grease, and loose material to ensure proper adhesion.
- Dispense the SEM® 29462 2-in-1 Seam Sealer from the tube. No mixing is required; use the product within its work window of 20-40 minutes at 70°F (21°C).
- Apply a uniform coat over the seam using a brush or roller, covering the joint completely.
- Allow the sealant to cure for 24 hours at 70°F (21°C) before sanding, painting, or further processing.
Compatibility
Compatible paint systems: Solvent.
Specifications
| Part No. | 29462 |
|---|---|
| Product Line | SEM |
| MFR Model | 29462 |
| Standard/Approvals | California Pro65 Warning: Cancer | GHS and OSHA Hazard |
| Manufacturer | SEM |
| UPC | 646786294624 |
| 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 | White |
| 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)
- Shelf Life
- Check local VOC
- 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® 29462 2-in-1 Seam Sealer to?
It is compatible with aluminum, concrete, fiberglass, OEM plastics, 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 is the usable work time after dispensing?
The product remains workable for 20-40 minutes at 70 °F (21 °C) before it begins to set.
What personal protective equipment is required when handling this product?
Wear eye protection, chemical-resistant gloves, protective clothing and a respirator as recommended in the SDS.
Documents & Safety
- Safety Data Sheet (SDS)
- sem_29462_catalog.pdf
- sem_29462_specification_sheet.pdf
- COLOR_COAT_13003_Catalog.pdf
Danger: This product is toxic if inhaled or ingested, can cause severe skin burns and eye injury, is a suspected carcinogen, may harm organs and reproductive health, and is hazardous to aquatic life.
Required PPE: wear safety glasses, chemical-resistant gloves, protective clothing, and a respirator appropriate for organic vapors.
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].
