DESCRIPTION:
Webbflex PU Foam is a modified one component polyurethane foam for the filling, sealing and insulation of joints and gaps in building and construction applications. The foam is dispensed as a mouse - like paste that expands rapidly after dispensing and which cures to a fine honeycomb structured foam by reacting with the atmospheric moisture. The cured product has excellent thermal and acoustic insulation properties and forms a strong bond to most construction materials. The propellant used has no ozone depleting potential. Webbflex PU Foam is supplied in pressurised aerosol canisters in both Gun and Nozzle grades.
TYPICAL USES:
Webbflex PU Foam is suitable for general gap filling, bonding and insulation applications. These include the perimeter sealing and fixing of windows and doors, sealing of service penetrations and bonding of insulation panels.
STORAGE:
Store between +5 dg C and 25 dg C in dry conditions upright and in original packaging. Shelf life approximately 9 months. Do not expose canisters to direct sunlight.
SURFACE PREPARATION:
Substrates must be clean and free from dirt and grease. Remove any loose particles by brushing. Dampen the joint surfaces with clean water before application to assist adhesion and accelerate curing.
APPLICATIONS:
Shake the can thoroughly at least 20 times to mix the contents before use and repeat periodically during use. Follow the instructions printed on the canister label. Joints should be slightly under filled to allow for post expansion of the foam. When filling deep joints apply in layers, waiting until each layer has skinned and partially cured before applying the next. Applying a slight misting of clean water between each layer before subsequent application will assist adhesion and cure speed. The foam will be tack free in approximately 10 minutes and trimmable in 30 - 60 minutes depending on thickness, temperature and humidity.
LIMITATIONS:
Webbflex PU Foam is not UV resistant and should be protected with a suitable opaque sealant, filler or paint. It does not bond to polythene, Teflon, siliconised or wax-like surfaces.
CHARACTERISTICS AND PROPERTIES:
| Product Name. |
Webbflex PU Foam |
| Type. |
Modified Polyurethane |
| Cure system. |
Moisture Reactive |
| Heat conductivity. |
0.04W/(M.K) |
| Compression stress |
@ 10% 30kPa |
| Water absorption. |
0.3vol% |
| Temperature resistance. |
-40 dg C - + 90 dg C |
| Application temperature range. |
+5 dg C to + 23 dg C |
| Storage temperature |
+5 dg C to + 25 dg C |
| Tack free time (30 min strand) |
8 - 10 min |
| Trimmable after |
30 - 60 min |
| Can yield approx* |
|
500 ml nozzle
750 ml nozzle |
18 - 20 litre
up to 40 litre |
* depending on application
Technique and ambient conditions. |
22 - 28 Kg.m-3 nozzle |
| Density range |
17 - 23 Kg.m-3 Gun grade |
| Shelf life |
9 months |
| Packaging |
500 and 750 ml canisters x 12 |
HEALTH AND SAFETY:
Use only in well ventilated areas. No smoking or naked flames. Wear safety glasses and protective clothes and gloves. Protect the surrounding area from accidental spillage. Remove splashes immediately with Webbflex PU Foam Solvent cleaner or acetone. Cured foam can only be removed mechanically. Store cans upright. Do not incinerate even when empty. Keep out of reach of children and pets. For more information please refer to the appropriate Material Safety Data Sheet.
Whilst every care has been taken in the preparation of this information, no warranty is given or implied in connection with any recommendation or suggestion made herein. We reserve the right to modify specifications from time to time without prior notice. The user is advised to conduct his own tests in order to determine the suitability of the product for the intended purpose. All goods are supplied subject to standard Conditions of Sale which are available upon request.
