LaSeal 738 Neutral High Quality Silicone Sealant
Main purposes
1.For sealing and bonding in kitchen, bathroom, sanitary;
2.For anti-mildew sealing and fungal resistance;
3.Widely used for different substrates.
Characteristics
1.KASTAR 738 belongs to RTV-1. Good extrusion and thixotropy between 4℃~40℃;
2.Excellent adhesion to all type marble, granite and cement materials;
3.Release low-molecular-weight alcohol and no unpleasant odor during cure; Excellent resistance to weather, UV, ozone, water; 5.Excellent resistance to low and high temperature change;
4.No fragility, rigidifification or crack at -50°C, and no softening, degradation at 150°C, when cured. It always keeps good elasticity;
5.Good compatibility with other neutral silicone sealants;
6.Containing anti-fungal compounds to prevent mouldy growth in areas subject to high humidity levels.
![](https://ecdn6.globalso.com/upload/p/21/image_other/2023-11/654339690b6f532905.jpg)
![](https://ecdn6.globalso.com/upload/p/21/image_other/2023-11/654339739873d27150.jpg)
Application
1.Cementation & seal of aluminum, glass, etc.
2.Weathering cementation & seal of aluminum plates and enamel curtain walls.
3.Seal & cementation of al-alloy door & window, storefront; show window, diagonal and skylight corner line.
4.Good sealing performance for glass, glass fiber, prottery & porcelain and greaseless material.
5. Weather sealing for stone curtain wall joints and precast slab joints.
6. Sealing for concrete expansion joints in tunnel and pavement.
7. Adhesion and sealing in expansion joint for ceramic engineering.
8. Joint sealing between stone and other materials like glass, metal, plastics etc.
9.General use in wet and humid areas
10.where fungal resistance is a requirement.
Technical Data Sheet(TDS)
Technology data:The following data are only for reference purpose, not intended for use in preparing specification
LaSeal 738 Neutral High Quality Silicone Sealant
Testing Standard: GB/T14683-2003 《Silicone Building Sealant》
Type | NeutralI |
Density (g/cm3) | 1.0 |
Capacity movement | ±30% |
skin formation | 10-12 minutes |
Curing Rate (2mm/h) | 5-6 |
Drying(4mm/h) | 8-10 |
Max. Tensile strength | 1.8 |
Hardness shore A | 28±2 |
EIongation at Break(%) | ≥500 |
ModuIus Mpa(100%) | 0.60 |
Application temperature | -20 ℃ to+40 ℃ |
Temperature resistance | -50 ℃ to+ 100℃ |
Adhesive | ok |
weatherproof | ok |
CoId-hot adhesive | ok |
Under water adhesive | ok |
EIasticaI Recovery (%) | 96 |
Mass-Ioss Rate (%) | 15 |
Skin drying time and fully drying time under: 23℃ and 50% humidity |
Limitations
1. Can’t be used as a structural sealant.
2. Unsuitable for all kinds of material that can effuse grease, plasticizer, or solvent.
3. Unsuitable for the airproof location, because it is required to absorb moisture in the air to cure for the sealant.
4. Unsuitable for frosty or moist surfaces.
5. Unsuitable for a continually soggy or moist place.
6. Can’t be used if the temperature is below 40°C or above 400°C on the surface of the materials.
Instruction
1. Clean the base material with cloth: clean it with solvent; if in particular demand, coat the surface with paint base and let it dry completely.
2. Make sure to fill the interface with it and tightly stick it to the base material.
3. Deal with adhesion test before use and make sure of good compatibility and viscosity of products and base material.
Storage and shelf life
1.They should be protected from water, frost and adverse air conditions.
2.They should be kept dry and cool on wooden pallets at between +10 °C and +25 °C in moisture free conditions.
3.The opened products should be consumed immediately.
4.Shelf life is maximum 12 months conditional to complying with the aforementioned storage conditions.
Technical Data Sheet(TDS)
Technology data:The following data are only for reference purpose, not intended for use in preparing specification
LaSeal 731 Middle Quality Acetoxy Silicone Sealant
Item | Data |
Type | Acetoxy |
Density (g/cm3) | 0.98 |
Capacity movement | ±30% |
skinning time | 5-15 minutes |
Drying time(2mm/h) | 8-10 |
Drying(4mm/h) | 18-22 |
Max. Tensile strength | 1.3 |
Hardness shore A | 21 Judges 2 |
Elongation at Break(%) | =500 |
Modulus Mpa(100%) | 0.60 |
Application temperature | -20 C to +40 C |
Temperature resistance | -50 C to +100 C |
Adhesive | OK |
weatherproof | OK |
Cold-hot adhesive | OK |
under water adhesive | OK |
Elastical Recovery (%) | 96 |
Mass-loss Rate (%) | 35 |
Limitations:The product is not applicable to structure assembly or project whose base material has a surface temperature above 40 ℃.