Great Stuff Pro

Great Stuff Pro™ Pestblock Foam, 20oz Pro Can

Great Stuff Pro™ Pestblock Foam, 20oz Pro Can

$22.79
  • SKU: DOW 11073754
  • Minimum Purchase: 3 units
  • Shipping: Free Shipping
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Description

GREAT STUFF PRO™ Pestblock is a pesticide-free, expanding polyurethane foam sealant formulated specifically to block pests from entering homes and buildings. It expands up to 3 inches to seal gaps, cracks, and holes, forming an airtight, water-resistant barrier. Designed for use with the GREAT STUFF PRO™ foam dispensing gun, it delivers precision application and professional results in both interior and exterior environments. It provides dual functionality:

  • Blocks the entry of pests such as ants, spiders, bees, cockroaches, and mice.
  • Improves energy efficiency by minimizing air leaks in homes and structures.

Features & Benefits

Feature Benefit
Expands up to 3 inches Fills, seals, and insulates large gaps and voids.
Pesticide-free Safe to use around sensitive areas; won’t harm bees.
Tack-free in ~6 minutes Fast application; quick to handle.
Trimmable in 30–60 minutes Easy to shape or finish after curing.
Airtight & water-resistant seal Durable protection from both pests and weather.
Reusable up to 30 days If kept attached to dispensing gun.
Paintable, sandable, and stainable Blends into finished surfaces.
Adheres to most materials Works with wood, metal, masonry, glass, most plastics.
Grey foam color Easy visual ID post-application.
UL classified; CCMC 13074-L Meets recognized safety and building standards.

Technical Data

Maximum Expansion Up to 3 inches (76 mm)
Tack-Free Time Approx. 6 minutes (at 70°F / 50% RH)
Trim Time ~30 minutes for 1” bead at 75°F (24°C)
Cure Time Dependent on temperature, humidity, bead size
Service Temperature Up to 240°F (116°C) (Do not expose to direct flame)
Color Grey
Gun Reusability 30 days when can is attached
Shelf Life Typically 12 months (store upright, cool, dry place)
Classifications UL Classified; CCMC 13074-L

Recommended Applications

Ideal for use in sealing entry points in:

  • Residential homes
  • Commercial buildings
  • Garages
  • Crawlspaces
  • Attics
  • HVAC areas

Specific use cases include:

  • Pipe and plumbing penetrations
  • HVAC ducting
  • Electrical outlet gaps
  • Attic penetrations
  • Rim joists and sill plates
  • PVC pipe gaps
  • Dryer vents
  • Hose bibs
  • Under baseboards and attic hatch frames

Common Substrates

  • Wood
  • Metal
  • Masonry
  • Glass
  • Most plastics

Note: Not recommended for Teflon®, polyethylene, or silicone surfaces.

Application Details

Preparation

  • Clean the surface: Ensure it is free of dust, grease, and moisture.
  • Wear protective equipment: Gloves, safety glasses/goggles, long sleeves.
  • Shake the can: Vigorously for at least 60 seconds before use.

Installation

  • Attach the can to a compatible GREAT STUFF PRO™ dispensing gun.
  • Adjust bead size using the gun’s control knob.
  • Apply foam into gaps slowly, allowing expansion to fill voids.
  • Recommended: 50% fill for expansion space.
  • Do not overfill. Foam expands rapidly.

Cure Time

  • Tack-free in ~6 minutes
  • Fully cured in 8–24 hours depending on humidity/temperature

Finishing

  • After curing (~30–60 mins), foam can be trimmed, sanded, or painted.
  • Protect from UV: Paint or coat if exposed to light to prevent discoloration.

Clean-up

  • Uncured foam: Remove with GREAT STUFF PRO™ Gun Cleaner.
  • Cured foam: Must be cut or mechanically removed.

Storage

  • Store upright in a cool, dry location.
  • Keep away from heat sources and ignition points.
  • Reuse within 30 days while attached to the dispensing gun.