SV-900 MS Polymer High-elasticity Sealant Adhesive

Precautions:

1. Surface Preparation:
   • Substrate surfaces must be clean, dry, and free of oil and grease.
   • Depending on the surface, abrasion (roughening) or the use of a primer/promoter may be required to ensure optimal adhesion.
2. Mold Release Agents:
   • External mold release agents are frequently used in plastic manufacturing. These agents must be thoroughly removed before bonding or sealing.
3. Testing Requirement:
   • Due to varying paint compositions (especially powder coatings) and the wide range of substrates, testing is mandatory prior to use.
   • Particularly plastics and coated surfaces must be tested.
4. Stress Cracking (PMMA & Polycarbonate):
   • Bonding or sealing PMMA (acrylic) and polycarbonate may lead to stress corrosion cracking under tension. Testing is essential before use in these applications.
5. Non-Adherent Substrates:
   • No adhesion to polyethylene (PE), polypropylene (PP), or polytetrafluoroethylene (PTFE).
6. Untested Substrates:
   • Testing should be performed for substrates not explicitly mentioned above.

Application (Usage):

1. Dispensing:
   • Use a manual caulking gun or pneumatic applicator gun for dispensing from cartridges (hard sausage packs) or foil sausages (soft packs).
   • When using compressed air, a pressure of 0.2 to 0.6 MPa is required.
2. Material Temperature:
   • Low sealant temperature increases viscosity, reducing extrusion rate.
   • Avoid this by warming the sealant to room temperature before dispensing.
3. Curing Acceleration:
   • Increasing the ambient temperature and humidity will increase the curing rate.

Cleaning:

1. Uncured Sealant:
   • Can be wiped off using solvents such as alcohol.
2. Cured Sealant:
   • Requires physical removal using tools like a scraper or knife.