Sarnacol®-2121 (US)

• Conformity with LEED®v4 EQ Credit: Low-Emitting Materials

• FM Global
• Underwriters Laboratories
• Underwriters Laboratories Canada
• Miami-Dade
• Florida Building Code
• ICC Code Compliance – ESR 1157
• CSA-A123.21

Liquid

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

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

240 g/L

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

General Application:

Sarnacol®-2121 (US) 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 0.9 m – 1.2 m (3 ft – 4 ft) 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 45 kg (100 lb) steel roller.

Roller Application:

Apply the adhesive only to the substrate and not the membrane using a 9.5 mm –12.7 mm (3/8 in – ½ in) medium nap roller up to 45.7 cm (18 in) 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 207 Bar (3000 PSI) and should be able to deliver a minimum of 5.6 L/min (1.5 GPM). Larger spray units will allow for longer hose runs and increased production. The hose should be a minimum of 12.7 mm (½ in) diameter with a 9.5 mm (3/8 in) whip 3.1 m (10 ft) long leading up to the gun. Sarnacol®-2121 (US) 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 0.68 mm – 0.88 mm (0.027 in – 0.035 in). However, the tip size can be increased to 1.1 mm (0.045 in) 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 25 cm – 30 cm (10 in –12 in) wide held 30 cm (12 in) off of the substrate is recommended.

Coverage

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

Roller:

• 2.5 m²/L (100 ft²/US gal.)

Spray:

• 3.3 m²/L (133 ft²/US gal.)
• 2.5 m²/L (100 ft²/US gal.) for concrete and DensDeck®