Did you know? Container sealing relies not only on steel and packaging materials but also on the choice of sealant. The primary function of container sealants is to seal welds and mounting holes, ensuring the container is watertight and leak-proof. Want to know which sealant is best for container sealing? Let’s find out!
Car container sealing faces multiple challenges: not only must it be moisture-proof and waterproof, withstand vibration and shock during transportation, but it must also adapt to temperature and climate changes and be resistant to chemical corrosion. Therefore, MS sealants are the best sealing materials.
Why is MS sealant suitable for car carriage sealing?
1.Adhesion
MS polymer based adhesives are made from a silane-terminated polyether (a polyether backbone with siloxane endcaps) as a base polymer. They require no primer and can directly bond. The highest bonding strength reaches 30 kg/cm².
2.Flexibility Requirements
Containers are often outdoors and are significantly affected by thermal expansion and contraction, so the sealing material must be flexible. MS polymer adhesive sealant effectively adapts to deformation, blocks moisture and dust, and maintains adhesion performance within a temperature range of -60-90 degrees Celsius.
3.Weather Resistance
The sealant itself does not generate bubbles and is resistant to rain, snow, and UV rays. Long-term exposure to harsh outdoor conditions effectively prevents cracking, breakage, yellowing, mildew, and debonding of the sealant.
4.Drainage Contamination
Some sealants contain large amounts of solvents. When these solvents, mineral oils, and small-molecule silicone oils precipitate, they can cause cracking and debonding, leading to seal failure and large stains on the container surface.
With zero formaldehyde, zero isocyanate, and no solvents, modified polymer sealant is non-toxic and odorless, with VOC emissions far below national standards. MS sealant does not stain like some silicone sealants (low-molecular-weight silicone materials can leach from the sealant surface) and does not compromise the environmental performance of the base material.
5.Odor Impact
Currently, container sealants can be broadly categorized as neoprene and butyl. Both are solvent-based sealants that produce a strong odor, which can linger inside the container even after the door is closed, potentially impacting cargo safety.
MS sealant is formaldehyde-free, solvent-free, PVC-free, non-toxic, odorless, and environmentally friendly, ensuring it will not affect cargo inside.
6.Paintability
It is compatible with most coatings and does not affect the surface appearance or quality of the paint.
How to Use Container Sealant?
- Before application, ensure the substrate is clean, dry, and free of oil. Rusted substrates (aluminum, copper, steel, iron, etc.) must be derusted first.
- Direct bonding is not suitable for oil-permeable substrates and requires prior treatment.
- Due to the diverse substrates and application methods.
- After the adhesive has dried, it is paintable with paint or coatings.