Sarnacol®-2121 (US)

• FM Global
• Underwriters laboratories
• Miami-Dade
• Florida Building Code
• ICC Code Compliance – ESR 1157

Liquid

12 months if stored properly in original unopened, sealed and undamaged packaging

Store in tightly closed containers in temperatures between 40°F (5°C) and 99°F (37°C)

240 g/L

The coverage rate may vary depending on substrate porosity, ambient temperature, and experience. The typical coverage rate for the following application methods are:
Roller:

100 ft2/gal (2.5 m2/L)

  
Spray:

133 ft2/gal (3.3 m2/L)
100 ft2/gal (2.5 m2/L) for concrete and Glass faced Gypsum Boards

All work surfaces should be clean, dry, free of dirt, dust, debris, oils and other contaminants.

Mix well before use using a drill and mixing blade.

General Application:
Sarnacol 2121 is designed for “wet lay in”. Care must be taken to ensure the adhesive has not skinned over or dried before the membrane is laid in place. This is especially important during applications at high temperatures. Adjustments may be needed in the application technique to ensure a wet lay in. It is recommended that only 3 - 4 ft (0.9 - 1.2 m) of adhesive is coated out ahead of the membrane to prevent dry laid membrane. Clean any wet adhesive from the seams before welding. Roll the membrane into the adhesive while it is still wet being careful to avoid wrinkles. Immediately begin brooming to work out any air bubbles starting at the center of the membrane and brooming to the sides with a medium bristle push broom. After brooming, roll the membrane in two directions with a minimum 75 lb (34 kg) steel roller.

Roller Application:
Apply the adhesive only to the substrate and not the membrane using a 3/8 - 1/2'' (9.5 - 12.7 mm) medium nap roller up to 18'' (45.7 cm) wide. The adhesive is poured onto the substrate in ribbons followed by rolling and spreading evenly.

Spray Application:
The airless sprayer must be able to generate pressure up to 3000 PSI (207 Bar) and should be able to deliver a minimum of 1.5 gpm (5.6 L/min). Larger spray units will allow for longer hose runs and increased production. The hose should be a minimum of 1/2'' (12.7 mm) diameter with a 3/8'' (9.5 mm) whip 10 ft (3.1 m) long leading up to the gun. Sarnacol 2121 has a high viscosity and may clog the filters of the airless sprayer. It is recommended that all filters in the spray rig and spray gun be removed and cleaned at the end of each day. Use a minimum tip size of 0.027 – 0.035'' (0.68 – 0.88 mm) however, the tip size can be increased to 0.045 in (1.1 mm) for greater throughput. Apply the adhesive using a fan pattern determined by the user. A wide fan pattern will cover more area faster but may be more difficult to control and may be more prone to overspray. Generally a fan pattern of 10 – 12'' (25.4 – 30.5 cm) wide held 12'' (30.5 cm) off of the substrate is recommended.