OSI RF140 Roof and Flashing Sealant is a synthetic rubber and asphalt-based sealant engineered for bonding roof shingles, flashings, and general roof repairs. This flexible, weather-resistant formula cures into a tough rubbery film that moves with your roof without cracking, making it ideal for protecting your home from water intrusion caused by temperature swings and structural movement.
Whether you’re sealing gaps in flashing, bonding shingles, or making general roof repairs, this sealant delivers long-lasting performance through years of continual weather extremes. Its ability to remain flexible after curing allows the roof to breathe and shift naturally without seal failure.
Features and Benefits
- Low-Temperature Extrudability: Can be applied at temperatures from 20°F to 90°F, enabling repairs even in cooler weather conditions without extrusion difficulty.
- Post-Cure Flexibility: Cures into a flexible rubbery film with greater expansion and contraction capability, allowing the roof to move without cracking or seal failure.
- Weather and UV Resistant: Resists cracking and remains durable through years of continual weather extremes and seasonal temperature changes.
- Easy Application: Suitable for both professional contractors and DIY homeowners.
- Fast Set Time: Sets in 24 hours, allowing work to resume shortly after application.
- Economical Coverage: A 1/4-inch bead covers 32 linear feet per 10.5 oz cartridge.
Specifications
- Brand: OSI
- Model: 1938618
- Size: 10.5 oz cartridge
- Color: Black
- Type: Synthetic rubber and asphalt-based roof and flashing sealant
- Application Temperature Range: 20°F to 90°F
- Set Time: 24 hours
- Coverage: 1/4-inch bead covers 32 feet per 10.5 oz cartridge
How to Use
- Application: Use for bonding roof shingles, flashings, and all general roof repairs.
- Surface Preparation: Sweep or wipe excess water from the surface and allow it to dry before applying the sealant.
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