Momentive RTV159 High Strength Silicone Rubber Adhesive Sealant

1. Product Overview

The Momentive RTV159 is a high-strength silicone rubber adhesive sealant designed for various industrial and scientific applications. This product is supplied in a 2.8 fluid ounce tube and is red in color. It is formulated to provide strong adhesion and sealing properties, suitable for demanding environments.

Key characteristics include its liquid form, high strength, and waterproof resistance. It is commonly used for countertop, flooring, masonry, and general repair applications.

Image 1.1: Momentive RTV159 High Strength Silicone Rubber Adhesive Sealant in a 2.8 oz red tube.

2. Safety Information

Always read the product label and Safety Data Sheet (SDS) before use. Adhere to all local regulations and guidelines for handling chemical products.

• Ventilation: Use in a well-ventilated area to avoid inhalation of vapors.
• Skin Contact: Avoid prolonged or repeated skin contact. Wear protective gloves (e.g., nitrile or butyl rubber) when handling. Wash hands thoroughly after use.
• Eye Contact: Avoid eye contact. Wear appropriate eye protection (e.g., safety glasses or goggles). In case of contact, flush eyes immediately with plenty of water for at least 15 minutes and seek medical attention.
• Ingestion: Do not ingest. If swallowed, do not induce vomiting. Seek immediate medical attention.
• Storage: Store in a cool, dry place, away from direct sunlight and incompatible materials. Keep container tightly closed when not in use.
• Disposal: Dispose of unused product and empty containers in accordance with local environmental regulations.

3. Setup and Preparation

3.1 Surface Preparation

For optimal adhesion, surfaces must be clean, dry, and free from oil, grease, dust, and other contaminants. Abrading surfaces may improve adhesion on certain substrates. Test adhesion on a small, inconspicuous area before full application.

3.2 Product Preparation

1. Ensure the sealant tube is at room temperature (20-25°C / 68-77°F) for easier application.
2. Puncture the seal at the nozzle end of the tube using a sharp object or the piercing tool often found on caulking guns.
3. Attach the provided nozzle to the tube. Cut the tip of the nozzle to the desired bead size at a 45-degree angle.

4. Operating Instructions (Application)

Apply the sealant using a standard caulking gun or by hand pressure for smaller tubes. Maintain steady pressure to ensure a continuous and uniform bead.

• Application: Apply the sealant directly to one of the prepared surfaces in a continuous bead or spread as required for the specific application.
• Assembly: Assemble the parts to be bonded or sealed within the sealant's skin-over time. Press firmly to ensure good contact and spread of the sealant.
• Tooling: If tooling is required to smooth the bead or fill gaps, do so immediately after application and before the sealant begins to skin over. Use a suitable tooling tool or a gloved finger moistened with a compatible solvent (e.g., mineral spirits) if necessary, but avoid excessive solvent use.
• Curing: The sealant cures by reacting with moisture in the air. Curing time will vary depending on temperature, humidity, and bead thickness. Allow sufficient time for full cure before subjecting the bond to stress or environmental exposure.

5. Maintenance and Storage

5.1 Cleanup

Clean tools and equipment immediately after use with an appropriate solvent (e.g., mineral spirits or xylene) before the sealant cures. Cured sealant may need to be removed mechanically.

5.2 Storage

To maximize shelf life, store the Momentive RTV159 sealant in its original, tightly sealed container in a cool, dry place (below 32°C / 90°F). Protect from freezing. Partially used tubes should be sealed tightly to prevent air and moisture exposure, which can cause premature curing.

6. Troubleshooting

• Poor Adhesion:
  • Ensure surfaces are thoroughly clean, dry, and free of contaminants.
  • Consider abrading smooth surfaces to improve mechanical keying.
  • Verify compatibility with the substrate by testing a small area.
• Slow or Incomplete Cure:
  • Ensure adequate humidity and temperature. Silicone sealants cure with atmospheric moisture.
  • Check if the sealant is past its shelf life or has been improperly stored (e.g., exposed to air).
  • Thicker beads will take longer to cure. Allow extended curing time for larger applications.
• Uneven Bead/Application:
  • Ensure the nozzle tip is cut cleanly and to the appropriate size.
  • Apply steady, consistent pressure to the caulking gun.
  • Practice on scrap material if new to sealant application.

7. Specifications

8. Warranty and Support

Warranty information for the Momentive RTV159 High Strength Silicone Rubber Adhesive Sealant is typically provided by the manufacturer. Please refer to the product packaging or contact Momentive directly for details regarding warranty coverage and technical support.

For further assistance or inquiries, please contact the manufacturer or your authorized distributor.