Description
SEM High-Build Primer Surfacer Black Aerosol | Boat Supply Store
Address imperfections and ensure superior adhesion for your marine refinishing projects with this high-build primer surfacer. It provides a flexible, acrylic coating engineered for robust performance, offering excellent filling capabilities across diverse substrates like fiberglass, metal, and plastics commonly found on watercraft. Achieve a uniform 2 mil dry film thickness with coverage up to 11 sq. ft. per can, preparing surfaces for a durable topcoat.
Key Features
- Flexible acrylic coating for impact resistance
- Superior adhesion to multiple marine substrates
- Excellent filling properties for surface imperfections
- Versatile application on steel, aluminum, urethane, fiberglass, plastics, and SMC
- Easy sanding for a smooth final finish
- Topcoat compatible with most refinish systems
- Convenient 20 oz. aerosol for precise application
- Fast flash time of 2-5 minutes between coats
Specifications
| Product Specifications | |
|---|---|
| Product | High-Build Primer Surfacer |
| Brand | SEM |
| SKU | CWR109313 |
| MPN | 42003 |
| Color | Black |
| Size | 20 oz Aerosol Can |
| Substrate Compatibility | Steel, Aluminum, Urethane, Fiberglass, Plastics, SMC |
| Coverage | 11 sq. ft. at 2 mil DFT |
| Recommended Coats | 2-3 medium wet coats |
| Dry Time | 1 hour |
| Flash Time | 2-5 minutes between coats |
| Coating Type | Flexible Acrylic |
Who This Is For
Boaters and DIY enthusiasts undertaking hull repairs or custom finishes on fiberglass, metal, or plastic components. Professional painters seeking a reliable primer for diverse marine substrates will benefit from its high-build and adhesion properties.
How It Compares
| Feature | SEM High-Build Primer Surfacer Black Aerosol | Competitor |
|---|---|---|
| Product Type | High-Build Primer Surfacer | Stone Chip Protection / Underbody Coating |
| Primary Function | Priming, Filling, Adhesion | Stone Chip Protection, Corrosion Resistance |
| Substrate Compatibility | Steel, Aluminum, Urethane, Fiberglass, Plastics, SMC | Primarily Metal |
| Sanding Capability | Easy to sand | Not designed for sanding |
| Aerosol Size | 20 oz | — |
| Color | Black | Black |
Common Concerns Answered
What if the nozzle clogs?
To prevent nozzle clogging, ensure proper cleaning after each use by inverting the can and spraying until only clear propellant is emitted. This routine maintenance ensures consistent application for future projects.
Can humidity or cold affect drying time?
Yes, drying times can extend in humid or cold conditions. For optimal results, apply in temperatures between 60-85°F (15-30°C) and ensure adequate ventilation.
Are other colors available?
This specific SKU is for the black version. While availability may vary, SEM offers a range of specialty coatings; consult product documentation for color options if needed.
Frequently Asked Questions
What surfaces can SEM High-Build Primer Surfacer be used on?
This primer is engineered for a wide array of substrates including bare metal (steel and aluminum), cured automotive paints, urethane, SMC, fiberglass, and most plastics.
How long does SEM High-Build Primer Surfacer take to dry?
The estimated dry time to touch is 1 hour. However, full cure and sandability may require longer, especially in less than ideal environmental conditions.
What is the coverage rate of SEM High-Build Primer Surfacer?
The coverage rate is approximately 11 square feet per can at a dry film thickness of 2 mils.
Can SEM High-Build Primer Surfacer be sanded?
Yes, this high-build primer is designed to be easily sanded, allowing for the creation of a smooth, uniform surface prior to topcoating.
What is the recommended number of coats for SEM High-Build Primer Surfacer?
It is recommended to apply 2-3 medium wet coats for optimal build and filling properties.
