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Bonding fresh concrete to existing concrete is as much about timing and surface preparation as it is about adhesive strength. Sikadur®-32 LP is a two-component epoxy bonding agent with an extended working life, suited to specified construction and concrete repair work in warmer conditions. It also serves as a corrosion-protection coating for prepared reinforcing steel in compatible repair systems.
Concrete bonding and reinforcement protection
Use Sikadur-32 LP as the specified bonding bridge when placing new concrete against sound, prepared existing concrete, or when a repair design calls for protection of exposed reinforcing steel. Its long-pot-life formulation gives installers more working time than a rapid-setting epoxy, particularly in the stated warm-weather application range.
Choosing the right repair system
This is a liquid bonding and reinforcement-protection system, not a thick paste for filling voids. For non-sag epoxy bonding or localised patching, see Sikadur-31 CF Normal. Select the appropriate bonding window, concrete preparation and reinforcement treatment using the current Sika technical data sheet.
Available in 3 L and 18 L pre-batched kits. Professional use and compatibility testing are recommended for the intended substrates and repair conditions.
Sikadur®-32 LP Physical Properties
| Property | Value |
|---|---|
| Base | Two-component epoxy bonding and reinforcement protection |
| Mixing ratio | A:B = 2:1 by weight or volume |
| Coat thickness | Approximately 1 mm maximum |
| Mixed density at 23°C | Approximately 1.4 ±0.1 kg/L |
| Application temperature | +20°C to +40°C |
| Pot life at +20°C | Approximately 145 minutes (200 g mix) |
| Pot life at +30°C | Approximately 55 minutes |
| Pot life at +40°C | Approximately 35 minutes |
| Consumption | Approximately 1.3 kg/m² per mm |
| Shelf life | 24 months |
| Potable-water approval | AS/NZS 4020:2018 specified contact |