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Techinical Information

Ultra Seal Straw Foam is a one-part, polymeric insulating foam/sealant that cures to form a rigid seal which will allow for normal movement between building components. Ultra Seal fills and seals gaps, cracks and holes within most types on construction materials to eliminate drafts and provide an R factor of 5.7 for each inch of foam-in-place.

Ultra Seal Straw Foam is recommended for: Heating / Air conditioning, plumbing, refrigeration, electrical, drywall, and general construction. Seals out radom, drafts, gases, odours, water, dust, sound, and pests. Ultra Seal Straw Foam is ideal for sealing around wall outlets, sill plates, foundation walls, behind baseboards, windows, and doors. Ultra Seal Straw Foam is a low expanding foam which prevents bowing of window and doors. Ultra Seal Straw Foam contains no CFC’s and is non-flammable.

Surfaces should be free of dust, oil, grease, frost, and loose debris which may impair bond. Dampness will not impair bond. For maximum yield the temperature of the Ultra Seal Straw Foam container should be 20°C (70°F). Minimum application temperature is 5°C (38°F). Colder temperatures lengthen curing time but will not affect the Ultra Seal Straw Foam properties when fully cured. When applying Ultra Seal Straw Foam follow the instructions on the container. Fill gaps, cracks and holes with the sealant making allowance for post expansion (fill cavities to 30% of volume). Multiple layers may be necessary in large cavities with successive layers being allowed to expand and cure before the next layer is applied. Curing may be accelerated by spray misting the surrounding surface with water prior to application of the foam. Avoid insertion into small tubular sections comprised of non-porous materials, if concerned about bowing of light-weight frames, provide temporary bracing before application of foam. Where adjacent surfaces are to be left exposed, provide a suitable protective masking during installation.
Limitations: Ultra Seal Straw Foam is not recommended for use in the following circumstances: • Exterior areas continuously exposed to ultra-violet rays, unless suitably protected.
• Long-term immersion in water.
• Long-term exposure to temperatures above 121°C.
• Use as a Class 1 vapour barrier.
• Do not use Ultra Seal Straw Foam where building codes require use of UL classified firestop systems complying with ULC/CAN4-S115-M85 for sealing building services or fire rated assemblies.

Contents under pressure. Do not place in hot water or near radiators, stoves or other sources of heat. Do not puncture or incinerate container or store at temperatures over 49°C. Keep out of reach of children. Do not leave container in a closed area such as a motor vehicle, especially in the summer heat. First Aid: Non-toxic under normal conditions. Treat as a mild irritant to skin. Flush eyes with water and see a physician. Product contains polymeric diisocyanate.

Ultra Seal Straw Foam meets ASTM-C-557 and Underwriters Laboratories Inc. Caulking and Sealants applied to inorganic reinforced cement boards + Flame spread 15, Smoke Developed 20.

Ultra Seal Straw Foam is packaged in 340 g (12 oz), 680 g (24 oz) and 908 g (32 oz) aerosol cans - 12 cans per case. For larger pro j e c t ’s Ultra Seal PF-100 Foam is available in 10 lb and 16 lb tanks with hose applicator. Ultra Seal Straw Foam is available in c reamy white colour only.

Ultra Seal Low Expansion Foam is an aerosol material and must be kept below 49°C. Notice to purchaser: Ultra Seal Low Expansion Foam is guaranteed to conform to product specifications, if used by the expiry date imprinted on each aerosol container (18 months after manufacture).

NUCO Inc., warrants only that its product will meet its specifications. NUCO shall in no event be liable for incidental or consequential damage. NUCO’s liability, expressed or implied is limited to the stated selling price of any goods found to be defective.

These values are not intended for use in preparing specifications. Spec Writers, please contact NUCO Inc. before writing specifications if any further information is required.

Type: Crosslinking single component polyurethane foam.
Moisture cured: Non-solvent based
Appearance: Homogeneous cell structure. Cream colour
Flammability: Contains flame retardant. This classifies the cured foam as
“self-extinguishing”. Although the foam is “combustible”,
meaning it will burn, in a fire situation the foam will self
extinguish in the absence of an open flame.
Open time: 20 minutes
Cure time: 6 – 12 hours
Application Temperature: 5°C – 40°C
Freeze/Thaw Stable: yes
Shelf Life: 18 months
Clean Up: Fresh Foam – acetone
Cured Foam – mechanically remove from substrate
Thermal resistance: 5.7 /inch (RSL=1)
Expansion: Approx. 25%
Yield nominal 1/4” bead per 32oz. can 2700 L. Ft.@ 1/4” bead
Yield nominal 1/4” bead per 24oz. can 1800 L. Ft.@ 1/4” bead
Yield nominal 1/4” bead per 12oz. can 900 L. Ft.@ 1/4” bead
Ultra Seal Low Expanding Foam is specifically designed as a low expanding product. 
It’s perfect for use  around windows and doors. 
It will not ‘post-expand’ and create pressure that will bow windows and doors.
Note: Always ensure that you fill holes, gaps and cracks only 50%, to leave room for expansion.

The information and data contained herein is BASED ON INFORMATION WE BELIEVE TO BE RELIABLE. Please read all statements, recommendations or suggestions herein in conjunction with our CONDITIONS of SALE which apply to all goods supplied by us. We assume no responsibility for the use of these statements, recommendations or suggestions, nor do we intend them as recommendation for any use which would infringe any patent or copyright.

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