Nuflex PF-50 All-Weather Foam for Contractors

UltraSeal PF-50 All Weather Straw Foam | Low Expansion Polyurethane Sealant

Not every job site has ideal temperature conditions — and not every adhesive performs when the conditions aren't ideal. At The Contractors Site, our all-weather foam adhesive is formulated to bond in the range of temperatures that Ontario contractors actually work in, from early spring rough-ins to late-fall exterior work, without the bonding failures that come with standard-grade adhesive in cold conditions.

Looking for a reliable sealant that performs in any condition? The UltraSeal PF-50 All Weather Straw Foam is a professional-grade, all-season polyurethane foam engineered for superior adhesion and energy efficiency. Designed for use with a straw applicator—no foam gun required—this one-component, low-expansion formula is ideal for sealing, insulating, and filling gaps in both residential and commercial projects.

Tested and UL classified, UltraSeal PF-50 delivers consistent results even in extreme temperatures and low-humidity environments, performing flawlessly down to -18°C. Its GREENGUARD GOLD certification ensures low VOC emissions, making it safe for indoor use while maintaining powerful, long-lasting performance outdoors.

Bond Through the Conditions, Not Around Them

Standard construction adhesives lose tack and fail to cure properly in cold temperatures — a problem that shows up often on Canadian job sites from October through April. All-weather foam adhesive maintains its bond performance across a broader temperature range, which means fewer cold-weather call-backs and more confidence in every application regardless of the season.

Key Features

• All-weather performance rated for temperatures as low as -18°C.

• No applicator gun required—includes straw dispenser for easy use.

• Low expansion formula for precise bead control and cleaner application.

• GREENGUARD GOLD certified for healthier indoor air quality.

• Reduces energy loss by sealing air leaks and drafts.

• Bonds securely to most construction surfaces including wood, metal, concrete, brick, stone, and plastics.

Common Applications

• Sealing around window and door frames.

• Filling and insulating gaps, cracks, and crevices.

• Sealing unrated pipe and duct penetrations.

• General use for residential and commercial air sealing projects.

This all-weather polyurethane foam helps builders, renovators, and DIYers achieve professional, airtight results year-round—ideal for energy-efficient construction and home repair.