Adhesives & Sealants
Caulk
DAP
$4-$10/tube

Butyl Caulk for Gutter and Roofing Sealing

Butyl rubber caulk is a heavy-duty sealant for roofing gutter and flashing applications requiring extreme weather resistance. Maintains flexibility from below zero to above 200F making it ideal for metal roofs gutter seams downspout connections and flashing joints.

Key Features

  • Extreme temperature resistance
  • Flexible in freezing cold
  • Adheres to wet surfaces
  • Aluminum compatible
  • UV and ozone resistant
  • Permanently flexible

Specifications

Size: 10.1 oz cartridge | Skin: 24-48 hrs | Full cure: never fully hardens | Temp range: -30F to 200F | Apply: caulk gun | Paintable: limited

Best For

Gutter seams roofing repairs flashing joints downspout connections metal roof seams and outdoor metal-to-metal sealing.

Compatible Materials

Aluminum
Galvanized metal
Copper
Concrete
Brick
Roofing materials

Pros & Cons

Pros

  • ✓ Extreme weather resistance
  • ✓ Adheres to wet surfaces
  • ✓ Never hardens or cracks
  • ✓ Excellent on metal
  • ✓ Very affordable

Cons

  • ✗ Messy to work with
  • ✗ Never fully cures
  • ✗ Difficult to tool smoothly
  • ✗ Can stain surfaces
  • ✗ Not for interior use

Installation Tips

Clean surfaces of rust dirt and old caulk. Apply continuous bead with caulk gun. Can apply to damp surfaces. Press components firmly together. Butyl stays permanently tacky so avoid touching. For gutter seams apply inside joint before assembling. Apply above 40F.

Frequently Asked Questions