CORESEAL 135A/ CORESEAL 135B Polyurethane injection grout for the elastic sealing of cracks in concrete structures.

DESCRIPTION :

CORESEAL 135A/ CORESEAL 135B is a two component polyurethane system consisting of a resin component (CORESEAL 135A) and a special type of isocyanate (CORESEAL 135B). This system is ideally suitable for the elastic sealing of cracks in concrete structures as well as areas suffering from water leakage problems. The use of CORESEAL 135A/ CORESEAL 135B as such is depending on the amount of water expected. In case the crack is dry or moist CORESEAL 135A/ CORESEAL 135B can be used directly into the crack. If a leakage of water has to be stopped CORESEAL 135A/CORESEAL 135B could be used in combination with the CORESEAL 357A/ CORESEAL 357 CAT.

CORESEAL 357A/ CORESEAL 357 CAT will first stop the water and / or react the water away, after which the injection of CORESEAL 135A/ CORESEAL 135B can be carried out.

PHYSICAL CONSTANTS OF THE LIQUID COMPONENTS

PROPERTIES	CORESEAL 135A	CORESEAL 135B
Colour	Yellow	Dark Brown
Specific gravity (Kg/m³)	1.040-1.060	1.220-1.240
Viscosity of the mixture at 25° C	mPa.s	150-250

• Viscosity of the mixture at 25° C mPa.s : 150 – 250
• Potlife at 20 °C: 70 - 90 minutes (after mixing both components) • Storage stability in well sealed drums : 12 months

OPERATIONAL DATA Although CORESEAL 135A/ CORESEAL 135B is a two component system, it can be used as a one component system. CORESEAL 135A/ CORESEAL 135B as a one component system.

• Step 1: Add the required amount of CORESEAL 135B to the CORESEAL 135A.
• Step 2: Mix it thoroughly until a homogenous mixture has been obtained, which will be the case after about 2 minutes.
• Step 3: The mix can be pumped by means of a single component injection pump. Keep in mind that the potlife of the system is 70 - 90minutes at 20 °C.
• After the injection the pump should be cleaned with CORESEAL SOL (These products may not contain any water).
• To prevent condensation on the liquids at the start of work, the temperature of the components should be at least as high as the ambient temperature.
• All opened drums of CORESEAL 135A and 135B should be purged with dry nitrogen and capped when not in use.

MIXING RATIO

• 100 parts by weight CORESEAL
• 135A 59 parts by volume CORESEAL 135B or
• 100 parts by volume CORESEAL 135A
• 50 parts by volume CORESEAL 135B

MECHANICAL AND PHYSICAL PROPERTIES OF THE END PRODUCT

Property	According to	Unit	Value
Tensile strength	ASTM D 638	N/mm²	2.0 - 2.1
Elongation at break	ASTM D 638	%	60 - 80
Shore hardness	ASTM D 2240		60 - 80 A (20 - 30 D)