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Underwriter's Laboratories , Inc. has tested 1572
in accordance with NSF standard 61, for contact with potable water at
a maximum use level of 15cm2/liter.
TYPE OF MATERIAL
1572 Water-Stop-Foam by WEBAC Corp. is a very flexible hydrophobic water
cut-off grout and soil stabilization grout based on a MDI (methylene-diphenyl-isocyanate)
polyurethane. The resin is 100% solvent free and 100% solids. The gel-time
of the product is adjustable by the mandatory adding of a certain percentage
of 152x Accelerator. Underwriter's Laboratories , Inc. has tested 1572
in accordance with NSF standard 61, for contact with potable water at
a maximum use level of 15cm2/liter.
Upon contact with water 1572 Water-Stop-Foam reacts to a very flexible
foam while expanding its volume 10 to 25 times. The cured material is
flexible in its elongation and compression properties, and is of a constant
volume. Since water is not a component of the foam structure, the cured
material is essentially not effected by water or dryness. The reacted
material does not shrink or swell.
Depending on the amount of accelerator added and the pressure of injection,reacts
to a very dense, closed cell, flexible material or a more open cell, flexible
product. For best waterproofing results the closed cell structure is desired.
157 Water-Stop-Foam is extremely well suited to seal against water in
moist and wet joints and cracks in concrete. The material offers high
flexibility and elongation properties combined with good adhesion on wet
and dry concrete surfaces in the injected environment. Higher Injection
pressures typically result in higher foam density and waterproofing quality.
To achieve most satisfying and permanent results in certain applications,
a commbination of 1572 Water-Stop-Foam with other systems of the WEBAC
Corp. product line may be advised. Ask your WEBAC Corp. technician for
details.
PROCESSING
WEBAC Corp. 1572 Water-Stop-Foam and the WEBAC Corp. 15X2 Accelerator
are supplied separately to allow adjustment of gel-time and to provide
a long shelf life. It is mandatory to add 15X2 Accelerator to ensure complete
reaction as designed. A higher percentage of Accelerator added will increase
reactive speed, expansion volume and lower the density of the product
accordingly. Since the end product is of cellular structure, a higher
density is favoured for best waterproofing properties.
Recommended mix ratios are between 5% and 10% of Accelerator added. In
situations of high water flow rates and /or low temperatures, ratios may
be increased to 20%.
Examples: In applications of high pressure water-intrusions, the system
will react aggressively on contact with water when catalyzed at 10% or
more. A slightly catalyzed product at about 2% on the other hand assures
good penetration results in very fine capillary crack injection and for
purposes of extended reach of product in the injected structure.
The accelerator system offers a very flexible bandwidth of reactive properties,
gel-time and expansion rate which make this product extremely versatile
for many applications.
Plan ahead: Observe temperature and humidity of the environment, since
both determine the pot-life of the premixed batch. Do not mix more material
than the amount that will be pumped within reasonable time. Rule of thumb:
High temperatures and high humidity - less accelerator.
1572 Water-Stop-Foam reacts with the moisture in the structure and does
not need large amounts of water to react. Simultaneous injection of water
is typically not necessary. If the area of application seems to be completely
dry, pre-injection of water may be recommended.
Caution: This proct is moisture activated. It is essential for all equipment
to be dry. Avoid any moisture contact with the mixture to prevent premature
reaction of the product. If reaction of the batch occurs while pumping,
immediately shut down the machine and flush with a cleaner to avoid built
up and clogging of the equipment.
MAINTENANCE OF EQUIPMENT
Remove all excess product and any smears. Tools and mixing equipment must
be cleaned immediately after use. R70 Pump Flush is good to your equipment
and should always be used. For best results please follow our recommendations.
First Step is conditional - Omit if in conflict with regulations on the
jobsite or the equipment you use: Flush first with a very small amount
of solvent (not supplied by WEBAC Corp.) to cut remaining material. Caution:
Xylol, Toluol, Acetone, M.E.K. are hazardous, combustible, aggressive
towards the environment, equipment, seals and hoses. Immediately follow
second step.
Second Step: Flush with WEBAC Corp. R70 Pump Flush circulate cleaner through
pump and hoses for several minutes at higher flow rates. R70 Pump Flush
is a solvent free, non-flammable cleaner, lubricator and pump and hose
conditioner. The product ships without hazard label.
PRECAUTION
Protect your health! While working with WEBAC materials, safety goggles,
gloves and safety clothing must be worn at all times. While injecting,
a full face shield is strongly recommended. Spills and blow-outs do happen!
Protect yourself and others on the jobsite. Consider property in proximity
of the application area to prevent loss or damage. Protect your jobsite
from unauthorized persons. Store all materials and equipment safely and
out of reach of children!
Observe container labels, MSDS, and instructions in the WEBAC Product
Catalog before using the product and equipment. In case one of the components
comes in contact with the skin, wash thoroughly with soap and water. Provide
adequate ventilation in volume and pattern in working area. Further protection:
emergency showers and eyewash stations.
TECHNICAL DATA
Please refer to pdf file
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