Polyurethane Expansion Adhesive (Foam)
When exposed to water, CYH 500 reacts to produce a cell that is as flexible as a rubber foam while expanding its mass up to 30 times. Flexible materials, after curing, will have a constant mass. Since water is not a component of the foam structure, the curing material is not affected by water or dryness. The material after the reaction will not shrink or expand. Depending on the syringe pressure, CYH 500 reacts to form a flexible and dense material or foam.
Areas of application include:
Faulty concrete (cracked or porous)
Waste water tank
Domestic water reservoir
Sewer lines, manholes, engineering boxes
Applies to the reverse side
Deep penetration and very small cracks
Foam increases in volume to fill gaps and gaps
The setting time can be adjusted
Excellent adhesion to wet surfaces
High adhesion strength, anti-fluctuation, inert after setting, stable weight, no shrinkage.
No new cracks
TECHNICAL AND PHYSICAL SPECIFICATIONS
Soluble in hydrophobic water
Density g / ml 1.12
Viscosity, cps (KS F 4923) 100-200
School blooms to 30 times
Touch time 200C / 680F 15 seconds
Freezing time 200C / 680F 65 seconds
Intensity (KS M 3734) 2N / mm2
Appearance Light yellow PU foam
Corrosive Not corrosive
Chemical resistance Resistance to many organic solvents, mild acids and alkalis
Shelf life 1 year in original packaging
Storage conditions In a cool, dry place
Packed in 20kg box
Substrate and ambient temperature minimum at 50
The material should be stored in a cool dry place. Best storage is when the packaging is at temperatures 150C – 300
Step 1: Clean the surface
Sometimes the actual concrete surface is below the sediment left by long-term leakage.
Step 2: Drill the syringe hole
To inject glue into the crack, need to install pump needle. The depth of the cross bore should be as close as possible to the center of the structure, if possible.
Step 3: Install the pump needle
Install the needle and the drilled hole, the rubber pipe should be placed below the concrete surface. If the needle cannot be inserted into the hole, it is necessary to gently pat and tighten with a spanner as possible.
Step 4: Drain the groove if necessary
In some cases, it is necessary to wash the slot with water to increase the permeability of the pumped glue to the wall deeper.
Step 5: Pump the crack
Choose the right glue for the application. The nature of the crack / joint and the site condition determine the materials to be selected. For general purposes, CYH 500 can be selected. Small cracks and dry cracks should be sealed with epoxy matrices. Certain situations can be solved with combinations of products.
Step 6: Clean up
As soon as the work is over, it is necessary to clean up. The pump needle can be removed within 1 hour and the gap can be mended with an epoxy mat.
Tools and equipment should be cleaned with acetone or a suitable diluent immediately after use.
Use impervious gloves or anti-stick cream when handling these products.
Wear goggles when applying. In case of eye contact, rinse thoroughly with plenty of clean water and consult a physician while itching persists. If in contact with skin, it must be removed prior to setting. Wash off with hand sanitizer, followed by soap and water. Do not use solvents. Ensure the environment is well ventilated when applying the product.