is a non-sagging type, and HY939L is a self-leveling type, divided into one-component and two-component neutral curing, and the two-component ratio is 1:1. Modified silane sealant specially designed for long-term weather-resistant sealing in industrial fields such as electronic components and mechanical equipment manufacturing. It has low modulus and high displacement characteristics and is suitable for large displacements of joints.
| Main chemical composition | Modified Silane | ||
| Model No. | HY939 | R939L | |
| Appearance | Gray paste | Gray semi-leveling | |
| Sag (mm) | 0 | / | |
| Extrudability (ml/min) | 200 | 400 | |
| Surface drying time (min) | 30 | 30 | |
| Elongation at break（%） | 700 | 800 | |
| Tensile strength (MPa) | ≥0.7 | ||
| Elastic recovery rate（%） | ≥70 | ||
| Tensile modulus（MPa） | ≤0.4 | ||
| Fixed-stretch cohesiveness | No damage | ||
| Adhesion after cold drawing-hot pressing, water immersion and heat treatment | No damage | ||
Heat aging |
Thermal weight loss (%) | ≤3 | |
| Cracking, chalking | No. | ||
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