This article examines the key differences between gun applicator and straw dispenser methods for polyurethane spray foam. It compares and contrasts the two technologies on criteria including convenience, precision, waste reduction, and cost. Relevant applications and selection factors are also discussed.
Keywords: polyurethane foam, PU foam, spray foam, dispensing gun, straw applicator, foam gun, sealing foam
Polyurethane (PU) spray foam is available in pressurized aerosol cans with either an attached straw or foam gun applicator. While both discharge foam, there are important distinctions between these two dispensing methods.
Straw applicators provide a simple, low-cost foam distribution option. Inserting the flexible plastic straw into gaps and cracks allows for crack and crevice sealing without a separate spray gun. However, straws offer less control over the foam flow rate and spray pattern compared to foam guns. Precise application is difficult, often resulting in excess waste.
Foam dispensing guns screw directly onto the canister valve and allow exact foam flow adjustment via the trigger and nozzle. Guns permit accurate foam placement in larger openings and voids. Unlike flimsy straws, metal foam guns are reusable on multiple cans.
For small DIY sealing tasks, straw foam application offers convenience and simplicity. But for frequent larger-scale foam use, a gun’s increased precision and less waste generally provide cost savings versus straws. Guns also enable spray foam application in hard to reach places.
In summary, for basic intermittent small foam tasks, straw applicators offer a cheap, disposable option. But for professional jobs or frequent substantial foam usage, a foam dispensing gun is worth the investment for better control and efficiency. Consider usage factors when selecting between GORVIA’s straw or gun foam products.
Gun and straw polyurethane foam applicators each have distinct advantages particular to different usage scenarios. For maximum sealing flexibility, GORVIA offers both dispensing options to suit any foam project scale or budget. Our foam expertise helps identify the best delivery method for each sealing application.
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