Construction joint sealant Lejell223
Product Description
Lejel-223 is one-component moisture curable polyurethane sealant. lt has excellent bonding and sealing performance. No corrosion and pollution to substrates, environment friendly,no bubbles during application, smooth and fine appearance etc
Furthermore, our sealant is highly resistant to environmental factors such as UV radiation, extreme temperatures, and chemicals, ensuring its longevity and effectiveness in challenging conditions. It provides excellent weatherproofing and prevents the degradation of building materials, thus extending the lifespan of structures. Additionally, our sealant is easy to apply, saving both time and labor costs during installation. Its non-toxic formulation promotes safety for workers and occupants, making it an ideal choice for projects prioritizing health and sustainability. In conclusion, our building.
Areas of Application
Suitable for areas where low movement, high resistance to penetration and pressure are required. For water proofing of air face on bridges, tunnels and drainage pipe.For precast panel, concrete internal wall and stone bonding and sealing.
Specification
•Sausage: 400ml / 600ml
•Drum: 20KGS / 240KGS
Technical Data①
| Items | Standard | Typical Value |
| Appearance | Black,white, grey homogenous paste |
/ |
| Density GB/T 13477.2 |
1.55±0.1 | 1.51 |
| Extrudability ml/min GB/T 13477.4 |
≥80 | 400 |
| Sagging properties(mm) GB/T 13477.6 |
≤3 | 0 |
| Tack free time②(h) GB/T 13477.5 |
≤24 | 0.5 |
| Curing speed (mm/d) HG/T 4363 |
≥2.0 | 3.2 |
| Volatile contents(%) GB/T 2793 |
≤7 | 1 |
| Shore A-hardness GB/T 531.1 |
50~55 | 53 |
| Tensile strength MPa GB/T 528 |
≥1.5 | 2.1 |
| Elongation at break % GB/T 528 |
≥450 | 500 |
| Tensile modulus Mpa GB/T 13477.8 |
≤0.4(23℃) | 0.75 |
| Tensile properties at maintained extension GB/T 13477.10 |
No failure | No failure |
| Adhesion/cohesion properties at maintained extension after water immersion GB/T 13477.11 |
No failure | No failure |
| Adhesion/cohesion properties at variable temperature GB/T 13477.13 |
No failure | No failure |
| Elastic recovery rate% GB/T 13477.17 |
≥70 | 80 |
| Operating temperature(℃) | -40～90 | |
1. AII data above were tested under standardized condition at 23±2°C, 50±5%RH.
2. Value of tack free time would be affected by change of environmental temperature and humidity.
Other Details
Guangdong Pustar Adhesives & Sealants Co., Ltd. is a professional manufacturer of polyurethane sealant and adhesive in China. The company integrates scientific research, production and sales. It not only has its own R&D technology center, but also cooperates with many universities to build a research and development application system. 
The self-owned brand “PUSTAR” polyurethane sealant has been highly praised by customers for its stable and excellent quality. In the second half of 2006, in response to changes in market demand, the company expanded the production line in Qingxi, Dongguan, and the annual production scale has reached more than 10,000 tons.
For a long time, there has been an irreconcilable contradiction between technical research and industrial production of polyurethane sealing materials, which has restricted the development of the industry. Even in the world, only a few companies can achieve large-scale production, but because of their super strong Adhesive and sealing performance, its market influence is gradually expanding, and the development of polyurethane sealant and adhesives surpassing traditional silicone sealants is the general trend.
Following this trend, Pustar Company has pioneered the “anti-experiment” manufacturing method in the long-term research and development practice, opened up a new road to large-scale production, cooperated with a professional marketing team, and has spread all over the country and exported to the United States, Russia and Canada. And Europe, the application field is popular in automobile manufacturing, construction and industry.
Hose sealant use steps
Expansion joint sizing process steps
Prepare construction tools: special glue gun ruler fine paper gloves spatula knife Clear glue utility knife brush rubber tip scissors liner
Clean the sticky base surface
Lay the padding material (polyethylene foam strip) to ensure that the depth of the padding is about 1 cm from the wall
Pasted paper to prevent sealant contamination of non-construction parts
Cut the nozzle crosswise with a knife
Cut the sealant opening
Into the glue nozzle and into the glue gun
The sealant is uniformly and continuously extruded from the nozzle of the glue gun. The glue gun should move evenly and slowly to ensure that the adhesive base is fully in contact with the sealant and prevent bubbles or holes from moving too fast
Apply clear glue to the scraper (easy to clean later) and modify the surface with the scraper before dry use
Tear off the paper
Hard tube sealant use steps
Poke the sealing bottle and cut the nozzle with proper diameter
Open the bottom of the sealant like a can
Screw the glue nozzle into the glue gun
