Isotex 520 Fire-Retardant Acrylic Sealant

Key Features of ISOTEX® 520

✅ Certified ASTM E84 – Flame Spread Test for Building Materials
✅ Low VOCs, Low Emission – Safe and environmentally friendly
✅ Extra Yield – Higher coverage than conventional adhesives
✅ Fast Curing – Dries within 10 minutes
✅ Non-hazardous and non-flammable in both liquid and dry film conditions

Technical Data

Appearance: Thick white liquid
Solid Content: 60±2%
Viscosity (at 30°C): 1500–2500 Cps
pH Value: 4–5
Specific Gravity: 1.2 g/L
Chloride Content: None
Service Temperature: -15°C to 70°C
Coverage Area: 15–20 m²/kg
Flame Spread Test: 1.3 seconds (Non-flame spreading)
VOC Content: 0.52 g/L

Bonding Strength:
At room temperature: 22.6 N/25.4 mm
Under high humidity: 30.7 N/25.4 mm

Application Instructions

1. Clean the duct surface to ensure it is dry and free from oil or contaminants.
2. Apply adhesive evenly using a roller or brush.
3. If the adhesive is too thick, dilute with water (maximum 5%).
4. Apply adhesive and wait approximately 10 minutes before installing insulation.
5. Clean tools with clean water after use.

Storage

Shelf Life: 12–18 months when stored in a cool, dry place with sealed packaging.

Packaging

Plastic pail – Net weight 10 kg

Summary

If you are looking for a safe, non-flame spreading, water-based insulation adhesive for HVAC duct systems and insulation installation, ISOTEX® 520 is the ideal solution. Suitable for construction, commercial buildings, and industrial applications.

Choose ISOTEX® 520 from Union Conmat Co., Ltd., a trusted distributor of thermal and acoustic insulation products from leading global brands such as ROCKWOOL. We provide complete solutions including aluminium tape, roof ridge covers, mineral wool, fiberglass insulation, reflective foil, roof insulation, flexible duct connectors, HVAC installation accessories, and general and fire-rated sealants such as rubber adhesive, silicone sealant, and acrylic sealant.