FlintBond® Caulk is an all-weather, SBS-modified bitumen flashing and repair mastic specially formulated for use with modified bitumen membranes, base sheets, and ply sheets. When used as a flashing cement, it is ideal for SBS-modified membranes seam and flashing details and cracks in concrete or control joints on low-slope roofs, as well as skylights, chimneys, vent pipes, gravel guards and down spouts on shingle roofs. FlintBond also delivers excellent repair performance on all modified bitumen and built-up roofing membranes in wet or dry conditions; it will bond underwater and will remain adhered where movement is expected to occur. FlintBond will not run, slip, sag, or mud crack. Formulated with superior high-temperature resistance, it will remain durable in high-heat locations such as heater vent pipes. FlintBond is not recommended for use on shingles.

Technical Information

FlintBond is manufactured with superior oxidized asphalts for extreme durability, and in-house SBS-modified asphalt blends for a high degree of quality product consistency. With its high SBS rubber content, FlintBond will remain highly resilient, flexible, and durable through all seasons. It provides excellent elongation and recovery properties, plus enhanced adhesive properties and durability. The following information represents typical physical properties of FlintBond Caulk:

• Color – Black

• Consistency – Thick soft mastic

• Packaging – 10.1 oz tube, sold 12 tubes per carton

• Weight – 0.92 lbs. per tube

• Application Temperature - 40°F-90°F

• Coverage – Approximately 24 lineal feet applied in a ¼” x ¼” bead

• Maximum VOC – 250 G/L • Flash Point (T.C.C.) - 105°F +

• Resistance to acids/alkyds – Excellent

• Meets or exceeds ASTM D4586, D3409


All surfaces must have proper drainage and be clean, dry, and free of surface rust and any other foreign matter. Excessive particulate surfacing materials on modified membranes must be removed (sweeping with a stiff broom is recommended) prior to application. For best results in cold weather, store at room temperature for 24 hours prior to application. Protective clothing and eyewear should be used during application of this product. Cut nipple on cartridge and cut spout to desired bead size at 45º angle, and load cartridge into caulking gun; apply mastic firmly into void or seam to provide solid fill. If desired, spread with trowel or putty knife, working material to an even consistency over and into the area to be sealed or repaired at a target 1/8”-1/4” thickness. If the problem area is over ¼” wide or 2” long, embed asphalt-saturated or open-weave fiberglass fabric to reinforce cement, then cover with additional mastic at prescribed thickness. Clean tools with mineral spirits or paint thinner.

Warranty Details

CertainTeed offers three asphaltic low-slope roof system warranty options: Limited Warranty on Materials, Integrity Roof System Limited Warranty, and Integrity Roof System No Dollar Limit (NDL) Limited Warranty. CertainTeed warranty durations are based on a combination of system specification and product selection. Please download an overview of these warranty options for details. Consult with your contractor or CertainTeed Territory Manager to determine which warranty is best for your project.     

CertainTeed offers standard asphaltic low-slope roof system warranty durations between ten and twenty-five years. Additionally, Gold Star Contractors can increase warranty durations by 25% by engaging in an Integrity Maintenance Agreement with their client.

Commercial Roofing Distributors

See All Distributors near You
Get Started