FlintBond® Trowel 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 seam and flashing details on SBS-modified membranes, cracks in concrete or control joints on low-slope roofs, and skylights, chimneys, vent pipes, gravel guards, and downspouts 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, as well as enhanced adhesive properties and durability.

The following information represents typical physical properties of FlintBond Trowel:

• Color – Black

• Consistency – Thick soft mastic

• Packaging – 3G, 5G

• Weight – 28 lbs. (3G), 48 lbs. (5G)

• Application Temperature - 40°F-90°F

• Coverage - Approximately 12-13 sq.ft. per gallon applied 1/8” thick; additional material may be required when 3-coursing to wet out and encapsulate fiberglass fabric.

• 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. Apply by trowel, putty knife, or gloved hand at rate of ⅛” – ¼” thick. For use with repairs, work cement into break or crack, extending 2”–4” beyond the problem area with feathered edges. 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 standard asphaltic membrane warranty durations between 10 and 25 years. Additionally, Gold Star Contractors can increase warranty durations by 25% by engaging in an Integrity Maintenance Agreement with their client. CertainTeed offers three warranty options: Limited Warranty on Materials, Integrity Roof System® Limited Warranty, and Integrity Roof System No Dollar Limit (NDL) Limited Warranty. CertainTeed asphaltic membrane warranty durations are based on a combination of system specification and product selection. When used within a CertainTeed low-slope roof system, coverage extends to CertainTeed low-slope accessories including, but not limited to, FlintPrime, FlintPrime Aerosol, FlintBond, and SmartFlash ONE.

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