The Karnak 298 Alumin-R Coating Silver 5 gal is a liquid applied systems for jobs that require Karnak model/MPN 298-5 in the 5G sell unit. 298 Alumin-R is a premium grade, single component, SBS rubber modified asphalt reflective coating specially formulated with aluminum pigment to be used as a reflective elastomeric coating over modified bitumen membranes, BUR asphalt roofs, spray polyurethane foam roofs, properly sloped concrete roofs and metal roofs.

Key Specs

• Brand: Karnak
• Model / MPN: 298-5
• SKU: KAR2985
• Sell unit: 5G
• Product type: Liquid Applied Systems
• Size / color: 5 gal
• Category: Commercial Roofing | Commercial Roofing/Membranes | Commercial Roofing/Membranes/Liquid Applied Systems
• Coverage / unit: 5 gal per listed unit

Key Features

• Easy to apply
• Tough, flexible, elastic, rubber-like film
• Excellent adhesion over clean asphalt surfaces
• Excellent water and water vapor-resistance
• Excellent weather-resistance
• Good resistance to salts and alkalies

Coverage & How Much You Need

This item is listed as 5 gal per listed unit. Use the project takeoff, manufacturer installation instructions, and expected waste/overlap to confirm the order quantity.

Compatibility / Fitment

Use this item only when the brand, model/MPN, size/color, sell unit, and system type match the project specification. Do not substitute it for a different liquid applied systems, pack size, color, membrane/system family, or installation condition without checking the manufacturer instructions.

FAQs

What exactly am I ordering?

Karnak 298 Alumin-R Coating Silver 5 gal, sold as 5G, with SKU KAR2985 and manufacturer model/MPN 298-5.

What model or part number should I match?

Match model/MPN 298-5 and confirm the brand is Karnak. If the job spec lists a different model, size, color, or system family, hold for review.

What unit is the price based on?

This listing is built around the 5G sell unit. Confirm the unit before comparing price, quantity, or coverage.

How do I estimate quantity?

Use 5 gal per listed unit, then add waste or overlap per the manufacturer instructions and the project design.

What should be checked before purchase?

Confirm the model/MPN, sell unit, size/color, jobsite condition, compatible system components, and any manufacturer installation limits before approving the order.

Roofing and exterior-envelope work can involve fall hazards, weather exposure, fumes, adhesives, and system-specific installation requirements; follow the manufacturer instructions, OSHA-safe work practices, and local code or use a qualified contractor.

Product Expert Notes

Choose this item when Karnak model/MPN 298-5, SKU KAR2985, and the 5G sell unit match the project requirement. It is best treated as an exact-match material selection, not a generic substitute.