1.Product Introduction
The sealing adhesive is mainly made of polymer resin materials, combined with a variety of functional additives for production and processing, and is used by mixing two components on site. It is an A and B two-component epoxy adhesive, mainly used in conjunction with crack repair adhesive as a primer for crack sealing and base bonding during crack sealing. Its performance meets the technical requirements for Class A adhesives specified in GB 50367-2013 Code for Design of Strengthening Concrete Structures, GB 50728-2011 Technical Specification for Safety Appraisal of Engineering Structural Strengthening Materials, GB 50550-2010 Code for Construction Quality Acceptance of Building Structural Strengthening Engineering, and JTG/T J22-2008 Code for Design of Strengthening Highway Bridges.

2. Performance Indicators

Testing Item	Performance Indicator
Colloid Performance
Tensile Strength (MPa)	≥30
Tensile Elastic Modulus (MPa)	≥3500
Elongation (%)	≥1.5
Colloid Performance
Flexural Strength (MPa)	≥45 and no brittle failure
Compressive Strength (MPa)	≥70
Bonding Performance
Standard Value of Steel-Steel Tensile Shear Strength (MPa)	≥16
Steel-Steel Butt Bonding Tensile Strength (MPa)	≥36
Steel-Steel T-Type Impact Peeling Strength (mm)	≤35
Normal Tensile Bond Strength of Steel to Concrete (MPa)	≥2.5, and concrete cohesive failure
Heat Distortion Temperature (°C), Method B with 0.45 MPa Bending Stress	≥60
Long-Term Service Performance and Medium Corrosion Resistance of Colloid	Comply with GB 50728-2011

3.Construction Process
-Crack inspection: check the crack size, number, stains, moisture and so on.
-Grass-roots treatment: use angle grinder to remove the loose layer of concrete surface, use brush, hair dryer and so on to clean up the surface dust; if there is oil and other stains, use acetone or industrial alcohol to scrub clean; if there is bright water or humidity, dry the substrate.
-Configuration of glue: take the appropriate amount of A and B components in the glue mixing container prepared in advance according to the quality ratio of A:B of 3:1, and mix well by hand or machine.
-Crack closure: Use putty knife to wipe the prepared adhesive into the cracks and flush with the substrate.
-End of construction: 12 hours after the construction is completed, the next construction work can be carried out.

4.Application Areas
Concrete cracks, steel plates, various brick plate joints
In the concrete structure crack grouting repair construction, for the closure of cracks and base paste
Bridges, dams, subways, tunnels, and other concrete substrate crack closure and blocking
Repair and levelling of concrete honeycomb pockmarked surface, widely used in the field of construction of building reinforcement in construction

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