Karnak - 28 Perfectseal Non-Fibered Aluminum Roof Coating, 5 gallon

Karnak 28 Non-Fibered Perfectseal Aluminum Roof Coating delivers a shimmering aluminum finish that protects asphalt roofing from intense solar heat. The reflective shield preserves the flexibility of the roof surface by preventing oil degradation, while the seamless aluminum layer enhances durability, minimizes thermal load, and extends roof life.

Key Features

• Forms a seamless, reflective aluminum shield to protect roofing oils from heat-related aging
• Reflects over 50% of solar radiation to reduce thermal stress and preserve flexibility
• Enhances durability and thermal stability without fiber reinforcement
• Suitable for use on properly weathered BUR, cured emulsions, modified bitumen, and aged metal surfaces

Packaging: 5-gallon pail (also available in 55-gallon drums)

• 5-gallon Pail = 42 Pails/Pallet
• 55-gallon Drum = 4 Drums/Pallet

Application temperature: 50 °F to 120 °F (rising)

Coverage: approximately 0.5 to 1 gallon per 100 sq ft

Service temperature (cured film): –15 °F to 180 °F

Weight per gallon: approximately 8.19 lb

Solids: ~56% by weight; ~44% by volume

VOC content: up to 450 g/L maximum

Meets ASTM D2824 Type I standards

• Ensure the surface is clean, dry, and free of dust, dirt, grease, rust, or loose material.
• Allow new BUR to weather at least 180 days before coating; cured emulsions require 3–5 days, torch-down or cold-applied modified bitumen require 30 days, and new metal roofs require 30 days of weathering.
• Mix the coating mechanically until uniform.
• Apply at 0.5 to 1 gallon per 100 sq ft using a soft roof brush, roller, or spray. Do not overwork to preserve aluminum leafing.
• Maintain application temperatures above 50 °F, and avoid exposure to moisture for 24–48 hours after application.
• Clean tools with mineral spirits; ensure proper ventilation and follow safety precautions.

Q: What level of reflectivity does this coating provide?
A: It reflects over 50% of solar radiation, helping to preserve roof materials by preventing heat-induced degradation.

Q: What are recommended substrate conditions before application?
A: New BUR must weather 180 days; emulsions should cure 3–5 days; modified bitumen and metal roofs need about 30 days of weathering prior to coating.

Q: What is the estimated coverage rate?
A: You’ll get about 0.5 to 1 gallon per 100 sq ft for a proper reflective layer.

Q: Why avoid overworking during application?
A: Excessive brushing or rolling disturbs the aluminum leafing, reducing reflectivity and the protective metallic layer.

Q: What safety precautions are needed?
A: Apply in temperatures above 50 °F, avoid thinning, keep away from open flames, ensure good ventilation, and clean tools with mineral spirits.