Karnak - 155 Amphibikote, 1 Gallon (Wet and Dry)

Engineered for challenging environments, Karnak 155 Amphibikote is a dependable cold-applied roofing cement that adheres to both damp and dry surfaces. Its advanced formulation allows for rapid response during unexpected roof leaks and moisture-exposed repairs, providing a secure bond in areas where standard cements might fail. Ideal for year-round use, this single-component solution brings performance, ease, and flexibility together in one compact 1-gallon can.

Key Features

• Bonds to wet or dry surfaces, making it reliable in emergencies
• Convenient 1-gallon size for medium-scale repairs or maintenance work
• Remains flexible and ductile after curing for long-term durability
• Available in Summer, Semi, and Winter grades to match seasonal conditions

Packaging: 1-Gallon Can = 6 Cans/Case; 30 Cases/Pallet

Weight per gallon: approximately 8.87 lb

Solids: 77% by weight (nominal); 70% by volume (nominal)

Color: black

Application temperature: 40 °F to 120 °F

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

VOC content: up to 250 g/L maximum

Coverage: approximately 8 gallons per 100 sq ft per coat (at 1/8 in thickness)

Standards: ASTM D-4586 (Type I, Class I & II), ASTM D-3409, Federal Spec SS-C-153 Type I

* This item is hazmat *

• Prepare the surface by removing dirt, dust, or debris; while it can bond to wet areas, cleaning improves adhesion.
• Open the 1-gallon can and apply the cement directly with a trowel. No heating or thinning is required.
• Spread at an average thickness of 1/8 in, which equals about 8 gallons per square per coat.
• For larger cracks or breaks, embed reinforcement fabric or mesh into the wet cement and cover with a second coat.
• Smooth as necessary to ensure even coverage.
• Allow the patch to cure before exposure to heavy water or foot traffic.
• Clean tools with mineral spirits and maintain ventilation during application.

Q: What makes the 1-gallon size practical?
A: It offers enough volume for medium-scale repair work while remaining portable and easy to handle.

Q: Can this product be applied in the rain?
A: Yes. Amphibikote is formulated to bond securely to wet surfaces, making it ideal for emergency leak repairs during storms.

Q: How thick should it be applied?
A: Approximately 1/8 in thickness, equal to 8 gallons per square per coat.

Q: Is reinforcement required?
A: For large cracks or breaks, reinforcing with cotton fabric, fiberglass mesh, or polyester mat is recommended before adding a second coat.

Q: What temperatures can it handle once cured?
A: The cured product performs continuously between 15 °F and 180 °F.