Sikaflex® P2G
Primerless windshield adhesive
Sikaflex® P2G is a primerless to glass, one component, cold-applied, fast curing, high-viscosity polyurethane adhesive designed for use in replacing direct glazed automotive glass parts. When used as directed, Sikaflex® P2G is an appropriate adhesive for use in auto glass replacement applications.
- Primerless to glass
- 6 Hour Minimum Drive Away Time (MDAT); tested according to FMVSS 212
- Short cut-off string
- Cost effective
PRODUCT BENEFITS
- Primerless to glass
- 6 Hour Minimum Drive Away Time (MDAT); tested according to FMVSS 212
- Short cut-off string
- Cost effective
Areas of Application
Sikaflex® P2G has been specifically designed for the Automotive Glass Replacement business. It is ideal for mobile and in-shop installations. This product is to be used by professional, experienced users only. Related process information in this PDS is specifically for Automotive Glass Replacement. For other applications, tests with actual substrates and conditions have to be performed ensuring adhesion and material compatibility.Product Details
| Chemical base | 1 component polyurethane | |
| Color (CQP001-1) | Black | |
| Cure mechanism | Moisture-curing | |
| Density (uncured) | 1.3 kg/l | |
| Non-sag properties | Excellent | |
| Application temperature | Product Ambient Substrate | 10 – 35 °C 4 – 43 °C 4 – 54 °C |
| Skin time (CQP019-1) | 30 minutes A | |
| Open time (CQP526-1) | 15 minutes A | |
| Shore A hardness (CQP023-1 / ISO 48-4) | 65 | |
| Tensile strength (CQP036-1 / ISO 527) | 5 MPa | |
| Elongation at break (CQP036-1 / ISO 527) | 400 % | |
| Tensile lap-shear strength (CQP046-1 / ISO 4587) | 3 MPa | |
| Minimum Drive Away Time (cars) according FMVSS 212 (CQP511-1) | See Table 1 | |
| Service temperature (CQP509-1 / CQP513-1) | -40 – 93 °C | |
| Shelf life | 9 months B |
| CQP = Corporate Quality Procedure | A) 23 °C / 50 % r.h. | B) Stored below 25 °C |
CURE MECHANISM
Sikaflex® P2G cures by reaction with atmospheric moisture. At low temperatures the water content of the air is generally lower and the reaction proceeds more slowly. More information can be found in the Minimum Drive Away Time table that follows.
| Rel. Hum. | Temperature (°F) | |||
| > 40 | > 55 | > 70 | 85 - 110 | |
| > 90% | 6 | 6 | 6 | 4 |
| > 75% | 6 | 6 | 6 | 6 |
| > 50% | 6 | 6 | 6 | 6 |
| > 0% | 6 | 6 | 6 | 6 |
Table 1: Minimum Drive Away Time (hours)
CHEMICAL RESISTANCE
Sikaflex® P2G is generally resistant to fresh water, seawater, diluted acids and diluted caustic solutions; temporarily resistant to fuels, mineral oils, vegetable and animal fats and oils; not resistant to organic acids, glycolic alcohol, concentrated mineral acids and caustic solutions or solvents.
Application
Surface preparation
Surfaces must be clean, sound, dry and free from all traces of traditional and non-traditional contamination. All corrosion must be removed and all bare metal scrapes and scratches must be prepared in accordance with Sika's Corrosion Treatment recommendations. For preparation of all bonding surfaces it is required to read and understand the instructions given in the Sika AGR Technician Training Manual. Windshields without ceramic coating need proper UV protection.
Application
Cut off the tip of the nozzle in accordance with the vehicle manufacturer’s recommendations and screw onto the cartridge or the unipack adapter.
It is recommended to apply the adhesive with a piston-type application gun. To ensure a uniform thickness of adhesive bead, we recommend that the adhesive be applied in the form of a triangular bead (see fig. 1).
Figure 1: Compressing adhesive bead to final size
Removal
Uncured Sikaflex® P2G may be removed from tools and equipment with Sika® Remover-208 or another suitable solvent. Once cured, the material can only be removed mechanically. Hands and exposed skin have to be washed immediately using hand wipes such as Sika® Cleaner-350H cleaning towels or a suitable industrial hand cleaner and water. Do not use solvents on skin.
Application limits
- Avoid contact with alcohol and alcohol containing solvents during cure.
- Do not apply over silicones or in the presence of curing silicones.
- Glass parts must always be installed within the open time. The open time is significantly shorter in hot and humid climates. Never install any glass part after the product has built a skin.