Benjamin Moore Ultra Spec EXT Exterior Paint – Flat, Satin & Soft Gloss | Formerly N447/N448/N449

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Benjamin Moore Ultra Spec EXT Exterior Paint is a professional-grade 100% acrylic exterior coating designed to deliver outstanding durability, color retention, and application performance in demanding environments. Now rebranded from the N-Series to W-Series (W447 Flat, W448 Satin, W449 Soft Gloss), this product is ideal for commercial, residential, and multi-surface exterior jobs where long-term protection and clean application are critical.

Formulated with Benjamin Moore's proprietary Gennex® Color Technology, Ultra Spec EXT resists fading, chalking, and mildew, while offering excellent adhesion and coverage on a variety of exterior substrates, including wood, vinyl, aluminum siding, trim, masonry, and metal.

AVAILABLE SHEENS:

• Flat (W447) – For a smooth, non-reflective finish
• Satin (W448) – For a soft, subtle sheen with added washability
• Soft Gloss (W449) – For added durability and a more polished look

KEY FEATURES:

• Formerly N447 Flat, N448 Satin, N449 Soft Gloss
• 100% acrylic exterior formula
• Excellent color retention and weather resistance
• Resists fading, cracking, peeling, and mildew
• Suitable for commercial and residential exterior surfaces
• Applies easily by brush, roller, or spray
• Low VOC; soap and water cleanup
• Available in thousands of colors via Gennex® tint system

RECOMMENDED USES:

• Wood, vinyl, aluminum siding
• Trim, doors, soffits
• Concrete, stucco, masonry
• Fences, railings, exterior metal

COVERAGE: 350-450 sq.ft. per gallon

DRY TIMES: 

• To touch: 1 hour
• Recoat: 4 hours

COLORS: Available in white and almost unlimited custom colors.

COMPLIANCE & CERTIFICATIONS:

• OTC
• OTC II
• CARB
• CARB07
• CARB19
• UTAH
• AZMC
• SCAQMD
• ASTM D6904, Wind Driven Rain
• ASTM D3273/D3274 Mildew Resistance Test
• MPI
• Flat: 10
• Satin: 315
• Soft Gloss: 11

SURFACE PREPARATION: 

Surfaces must be clean, dry and free of oil, grease, wax, rust, mildew, chalk and loose or scaling paint. Cement based water proofing paints should be removed. Glossy surfaces must be dulled. Un-weathered areas such as eaves, porch ceilings, overhangs and protected wall areas should be washed with an appropriate cleaner and rinsed with a strong stream of water from a garden hose or power washer to remove contaminants that can interfere with proper adhesion. All new masonry surfaces must be power washed or brushed thoroughly with stiff fiber bristles to remove loose particles. New masonry substrates must be allowed to cure for 30 days before priming or painting. Poured or pre-cast concrete with a very smooth surface should be etched or abraded to promote adhesion, after removing all form release agents and curing compounds. 

All new masonry surfaces must be power washed or brushed thoroughly with stiff fiber bristles to remove loose particles. New masonry substrates must be allowed to cure for 30 days before priming or painting. Poured or pre-cast concrete with a very smooth surface should be etched or abraded to promote adhesion, after removing all form release agents and curing compounds. Difficult Substrates: Benjamin Moore offers a number of specialty primers for use over difficult substrates such as bleeding woods, grease stains, crayon markings, hard glossy surfaces, or other substrates where paint adhesion or stain suppression is a particular problem. Your Benjamin Moore® retailer can recommend the right problem-solving primer for your special needs.

PRIMER SYSTEMS: New surfaces should be fully primed, and previously painted surfaces may be primed or spot primed as necessary. For best hiding results, tint the primer to the approximate shade of the finish coat, especially when a significant color change is desired.

Special Note: Certain custom colors require a Deep Color Base Primer tinted to a special prescription formula to achieve the desired color. Consult your retailer.

• Wood, and engineered wood products: Multi-Purpose Primer (067)
• Bleeding Woods (Redwood, Cedar, etc.): Fresh Start® Exterior Deck & Siding Primer (094) or Fresh Start® High-Hiding All Purpose Primer (046)
• Hardboard Siding, Bare or Factory Primed: Multi-Purpose Primer (067) or Fresh Start® HighHiding All Purpose Primer (046)
• Vinyl Siding & Vinyl Composite: In most cases, a primer is not necessary. Only areas of pitted and porous vinyl siding must be primed. In these cases, we recommend Fresh Start® HighHiding All Purpose Primer (046) Colors that are safe for use on vinyl siding - Do not paint vinyl with any color darker than the original color or having a Light Reflective Value (LRV) of less than 55 unless it is in the Benjamin Moore approved Colors for Vinyl palette and comports with the specific vinyl manufacturer guidelines when making the color selection and painting. Otherwise, the color will absorb more heat, possibly causing the siding to warp, resulting in additional repairs and expenses.
• Rough or Pitted Masonry: Ultra Spec® Masonry Interior/Exterior Hi-Build Block Filler (571)
• Poured or Pre-cast Concrete/Fiber Cement Siding: Ultra Spec® Masonry Interior / Exterior 100% Acrylic Masonry Sealer (608) or Masonry High Build Primer (N609)
• Ferrous Metal (Steel and Iron): High Performance Acrylic Metal Primer (HP1100) or High Performance Alkyd Metal Primer (HP1320) 
• Non-Ferrous Metal (Galvanized & Aluminum): All new metal surfaces must be thoroughly cleaned with Oil & Grease Emulsifier (HP6000) to remove contaminants. New shiny non-ferrous metal surfaces that will be subject to abrasion should be dulled with very fine sandpaper or a synthetic steel wool pad to promote adhesion. High Performance Acrylic Metal Primer (HP1100)

APPLICATION:  Stir thoroughly before and during use. Apply one or two coats. For best results, use a premium nylon/polyester brush, premium roller, or a similar product. Apply paint generously from unpainted area into wet area.

• Brush: Nylon / polyester 
• Roller: Premium Quality
• Spray, Airless: Pressure / 1,500 – 2,500 PSI Tip / 0.011 – 0.015