Polycarbonate Sealant AS-209

Description

ALSEAL Polycarbonate Sealant AS-209 is a one-component, 100% neutral cure silicone sealant specially formulated for polycarbonate bonding. It can bond well to the Polycarbonate even it uses an anti-scratch coating for protection. It will not cause discolouration to the standard polycarbonate material. It has excellent resistance to weathering, UV radiation, vibration, moisture, ozone, temperature extremes, airborne pollutants, and many cleaning detergents and solvents.

Features

• Excellent bonding to polycarbonate
• No discolouration to polycarbonate
• Permanently flexible
• Indoor and outdoor use

Applications

Polycarbonate Sealant AS-209 is special for bonding and sealing polycarbonate and other plastic sheet materials in roofing and cladding applications. It will bond to form a strong weatherproof seal on most common building materials: aluminium, galvanized and zinc-coated steel, painted surfaces, glass, brick, and concrete. It is suitable for indoor and outdoor applications.

Usage Instructions

1. Surfaces must be clean, dry and free of dirt, grease, oil or water.
2. For a neat finish, apply masking tape. Remove it before sealant skins over.
3. Cut the nozzle at a 45° angle to the desired bead width and apply to a substrate with a sealant application gun.
4. Tool the sealant within 10 minutes of extrusion before it skins. Tack-free in 20 minutes.
5. Uncured sealant can be cleaned up with mineral spirits.
6. Use approved backing material for joints over 10mm deep

Joint design

• The specified sealant bead size should be calculated to comply with the compression and extension capabilities of the sealant in relation to the anticipated joint width due to expansion and contraction.
• Generally, calculation of the width sealant bead should be computed on the basis of a maximum ±25 % movement capability
• The minimum bead size should not be less than 6 mm to accommodate movement.
• Sealant design joint width-to-depth ratio should be 2:1.

Clean up

• Wet sealants can be cleaned up with acetone or mineral spirits.
• Cured sealants can only be removed mechanically.

Learn more about Polycarbonate Sealant

Additional information

Technical data

Curing system                                                        : Moisture curing, neutral
Density                                                                     : 1.00 g/mL
Slump (ASTM D2202)                                           : <1 mm
Maximum tensile strength (ASTM D412)        : 1.7 N/mm²
Elongation (ASTM D412)                                      : 420 %
Shore A hardness (ASTM C661)                          : 26
VOC content (USEPA Method 24)                       : 55.83 g/L