Karnak -19 Ultra Rubberized Flashing Cement 10.1oz Tube Wet/Dry, Emergency Repair

Karnak 19 Ultra Rubberized Flashing Cement is a premium-grade, rubber-reinforced asphalt sealant formulated for both wet and dry surfaces. Packaged in a 10.1 oz tube, it’s ideal for quick and emergency repairs on roofing, chimneys, flashing, and other construction surfaces. This versatile cement offers excellent adhesion and flexibility, even under harsh weather conditions, making it a go-to choice for contractors and maintenance crews alike.

Key Features

• Elastomeric rubberized formulation for superior flexibility and long-term durability
• Water-displacing (wet/dry) adhesion allows use in damp or rainy conditions
• High resistance to sagging under elevated roof temperatures
• Ready to apply—no mixing required; available in Summer, Semi, and Winter grades

Packaging: 10.1 oz tube (cartridge); 48 Tubes/Case;32 Cases/Pallet

Application temperature: 40 °F to 120 °F (substrate should be moisture-free if below 40 °F)

Coverage: approximately 8 gallons per 100 sq ft at 1/8‑inch thickness per application

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

Solids: approximately 74% by weight; 66% by volume

VOC content: up to 270 g/L

Meets ASTM D‑4586 Type I (Class I & II), ASTM D‑3409, and Federal Specification SS‑C‑153 Type I

• Clean and dry the repair surface, removing debris and excess moisture.
• Load the cartridge into a caulk gun and cut the nozzle to the desired bead size.
• Apply the cement at approximately 1/8‑inch thickness, pressing it firmly into seams, flashings, or cracks.
• For larger or complex repairs, embed reinforcing fabric (e.g., saturated cotton, fiberglass, or polyester), then apply a second cement coat over the patch.
• Smooth the surface for uniform adhesion and appearance.
• Allow to cure completely before exposure to water or foot traffic.
• Clean tools with mineral spirits and ensure adequate ventilation during use.

Q: Why choose the tube format?
A: It enables precise, controlled application in tight, vertical, or elevated areas where bulk containers are impractical.

Q: Can it be applied when the surface is damp?
A: Yes—its water-displacing formula allows adhesion even in wet conditions, though clean, dry surfaces yield better results.

Q: What coverage can be expected per tube?
A: Approximately 100 sq ft at a 1/8‑inch layer (roughly 8 gallons per 100 sq ft).

Q: Should I use reinforcement for large cracks or gaps?
A: Yes. Embedding fabric or mesh before applying a second layer increases durability.

Q: Is the cured sealant flexible over time?
A: Yes—it remains elastic and weather-resistant across a service range of 15 °F to 180 °F.