10 Best Caulk For Gutters of December 2025

• Sealant comes in a 9 oz. Cartridge, is intended for exterior applications only, VOC compliant, backed by a lifetime guarantee, has a low odor, and meets ASTM C920 Type s grade NS class 25
• Gutter and flashing point sealant can be applied to wet or dry surfaces and even in the most extreme of temperatures, like 20-degrees to 120-degrees Fahrenheit
• Thanks to its Crystal Clear Color, the sealant will blend in seamlessly with nearly all types of building material substrates

DAP

• Permanently flexible, water resistant seal
• Seals most common gutter and downspout materials
• Expands and contracts with temperature changes
• Country of Origin: United States

OSI

• The product is 10.1OZ Gutter Sealant
• Basements & Below Grade Areas
• The product is manufactured in China
• The product is 10.1OZ Gutter Sealant
• The product is manufactured in China
• Exterior use
• Solvent clean-up
• Exterior use
• Solvent clean-up
• Durable
• Watertight
• Flexible

Red Devil

• Provides a Watertight Seal
• Remains Flexible in Temperature Extremes
• Satisfaction
• Meets performance requirements of Federal Specification TT-S-001657 and ASTM Specification C-1085

White Lightning

• Excellent adhesion
• Remains permanently flexible
• Ideal for below Grade areas
• Paintable
• Solvent clean up

Red Devil

• Incredibly versatile 100% silicone sealant that dries translucent clear
• Best for sealing gaps or cracks between two surfaces; Works on window, door, kitchen, bath, gutters, auto, marine and more
• Indoor/outdoor; 100% Waterproof
• Won't Yellow, shrink or crack
• Mold and Mildew resistant

Gorilla

• 100% WATERPROOF & WEATHERPROOF: 100% silicone formula offers excellent protection from water damage, providing a reliable seal in areas prone to consistent water and weather exposure
• 10-YEAR MOLD-FREE PRODUCT PROTECTION: Protects against stain-causing mold and mildew growth
• FAST CURE & TACK-FREE TIME: Offers 30-minute tack-free time and full cure within 24 hours to keep projects on schedule
• EXCELLENT FLEXIBILITY & STRONG ADHESION: Provides a flexible, durable and long- lasting seal
• FREEZE & SUN-PROOF: Resists freezing temperatures and UV degradation for a permanently flexible seal
• 30-MINUTE RAIN-READY: Ready for rain exposure in as little as 30 minutes
• WON’T BLEMISH METALS: Will not discolor most high-end metal finishes like chrome, bronze and nickel
• BACKED BY A LIFETIME GUARANTEE: Get high-quality results, guaranteed for as long as you own your home
• NON-PAINTABLE: Designed for applications in which the seal or area will not need to be painted
• See product packaging images provided on this product page for complete performance and warranty information

GE Sealants & Adhesives

• Incredibly versatile 100% silicone sealant that dries translucent clear
• Best for sealing gaps or cracks between two surfaces; works on window, door, kitchen, bath, gutters, auto, marine and more
• Indoor/outdoor; 100% waterproof
• Won't yellow, shrink or crack
• Mold and mildew resistant

Gorilla

• Item Weight: 0.79 lb
• Country of Origin: United States
• Brand name: GE
• Item Dimensions: 0.52"L x 0.98"W x 0.65"H

GE

• Banned in CA
• United States
• Package Dimensions: 5.08 L x 31.115 H x 5.715 W (centimeters)
• 10 oz

Geocel