Sikadur®-32 LP
Epoxy structural bonding agent for use at high temperatures
Sikadur®-32 LP is a 2-part, epoxy based structural bonding agent for use at high temperatures. It is moisture tolerant and can bond wet or dry materials to damp or dry substrates.
- Application temperature range +20 °C to +40 °C
- Thickness up to 1 mm
- Easy to mix and apply
- Suitable for dry and damp concrete substrates
- Very good adhesion to many construction materials
- Hardens without shrinkage
- Different coloured parts (for mixing control)
- No primer needed
- High initial and ultimate mechanical strengths
- Impermeable to liquids and water vapour
Usage
As a structural bonding agent and adhesive for:- Concrete elements (including bonding fresh to hardened concrete)
- Hard natural stone
- Ceramics, fibre-cement
- Mortar, Bricks, Masonry, Render
- Steel, Iron, Aluminium
- Wood
- Polyester / fibreglass and epoxy resin materials
- Glass
Advantages
- Application temperature range +20 °C to +40 °C
- Thickness up to 1 mm
- Easy to mix and apply
- Suitable for dry and damp concrete substrates
- Very good adhesion to many construction materials
- Hardens without shrinkage
- Different coloured parts (for mixing control)
- No primer needed
- High initial and ultimate mechanical strengths
- Impermeable to liquids and water vapour
Packaging
| Parts A+B | 5 kg ready to mix unit Pallets of 390 units (450 kg) |
| Parts A+B | 1,2 kg ready to mix unit Box of 6 units (7,2 kg) |
Refer to current price list for packaging variations
Colour
| Part A | white |
| Part B | dark grey |
| Parts A+B mixed | concrete grey |
Product Details
SUSTAINABILITY
- Conformity with LEED v4 MRc 4 (Option 2): Building Product Disclosure and Optimization - Material Ingredients
- Conformity with LEED v2009 IEQc 4.1: Low-Emitting Materials - Adhesives and Sealants
APPROVALS / CERTIFICATES
- CE Marking and Declaration of Performance to EN 1504-4 - Structural bonding
Composition
Epoxy resin and selected fillers
Shelf life
24 months from date of production
Storage conditions
The product must be stored in original, unopened and undamaged sealed packaging in dry conditions at temperatures between +5 °C and +30 °C. Always refer to packaging.
Density
Mixed resin ~1,4 ± 0,1 kg/l
Value at +23 °C.
Product declaration
EN 1504-4: Structural bonding
Compressive strength
| Curing time | Curing temperature | ||
| +23 °C | +30 °C | +40 °C | |
| 1 day | − | ~2 N/mm2 | ~30 N/mm2 |
| 3 days | ~14 N/mm2 | ~24 N/mm2 | ~41 N/mm2 |
| 7 days | ~34 N/mm2 | ~38 N/mm2 | ~52 N/mm2 |
| 14 days | ~39 N/mm2 | ~43 N/mm2 | ~56 N/mm2 |
Compressive strength at 4 % elongation
Modulus of elasticity in compression
| ~2100 N/mm2 (14 days at +23 °C) | (ASTM D 695-95) |
Tensile strength in flexure
| Curing time | Curing temperature | ||
+23 °C | +30 °C | +40 °C | |
| 1 day | − | − | ~18 N/mm2 |
| 3 days | ~21 N/mm2 | ~20 N/mm2 | ~30 N/mm2 |
| 7 days | ~24 N/mm2 | ~28 N/mm2 | ~36 N/mm2 |
| 14 days | ~38 N/mm2 | ~38 N/mm2 | ~42 N/mm2 |
Modulus of elasticity in flexure
| ~2600 N/mm2 (14 days at +23 °C) | (DIN EN ISO 178) |
Tensile strength
| Curing time | Curing temperature | ||
+23 °C | +30 °C | +40 °C | |
| 1 day | − | − | ~11 N/mm2 |
| 3 days | ~13 N/mm2 | ~16 N/mm2 | ~18 N/mm2 |
| 7 days | ~20 N/mm2 | ~18 N/mm2 | ~22 N/mm2 |
| 14 days | ~22 N/mm2 | ~24 N/mm2 | ~25 N/mm2 |
Tensile adhesion strength
| Curing time | Substrate | Curing temperature | Adhesion strength |
| 7 days | Concrete dry | +23 °C | > 3 N/mm2 * |
| 7 days | Concrete moist | +23 °C | > 3 N/mm2 * |
| 1 day | Steel | +23 °C | ~8 N/mm2 |
| 3 days | Steel | +23 °C | ~12 N/mm2 |
| 3 days | Steel | +30 °C | ~13 N/mm2 |
| 3 days | Steel | +40 °C | ~15 N/mm2 |
*100% concrete failure
Shrinkage
Hardens without shrinkage.
Coefficient of thermal expansion
| 11,4 × 10−5 1/K | (EN 1770) |
(linear expansion between +23 °C and +60 °C)
Heat deflection temperature
| Curing time | Curing temperature | HDT |
| 7 days | +23 °C | +49 °C |
(thickness 10 mm)
Application
Mixing ratio
Part A : Part B = 2 : 1 by weight or volume
Layer thickness
~1 mm max.
Sag flow
| Non-sag up to 1,0 mm thickness on vertical surfaces | (EN 1799) |
Product temperature
+20 °C min. / +40 °C max.
Ambient air temperature
+20 °C min. / +40 °C max.
Dew point
Beware of condensation.
Steel substrate temperature during application must be at least +3 °C above dew point.
Substrate temperature
+20 °C min. / +40 °C max.
Substrate moisture content
Cementitious substrates must be dry or matt damp (no standing water).
Brush the adhesive well into the substrate if matt damp.
Pot Life
| Temperature | Potlife* | Open time |
| +20 °C | ~145 minutes | ~270 minutes |
| +30 °C | ~55 minutes | ~240 minutes |
| +40 °C | ~35 minutes | ~120 minutes |
*200 g
The potlife begins when Parts A+B are mixed. It is shorter at high temperatures and longer at low temperatures. The greater the quantity mixed, the shorter the potlife. To obtain longer workability at high temperatures, the mixed adhesive may be divided into smaller quantities. Another method is to chill Parts A+B before mixing (not below +5 °C).
Consumption
~1,3 kg/m2 per mm of thickness.
This figure is theoretical and does not allow for any additional material due to surface porosity, surface profile, variations in level or wastage etc.
SUBSTRATE QUALITY
Concrete / masonry / mortar / stone
Concrete and mortar must be at least 3–6 weeks old.
Substrate surfaces must be sound, clean, dry or matt damp. Free from standing water, ice, dirt, oil, grease, coatings, laitance, efflorescence, old surface treatments, all loose particles and any other surface contaminants that could affect adhesion of the bonding agent.
Steel
Surfaces must be clean, dry, free from oil, grease, coatings, rust, scale, all loose particles and any other surface contaminants that could affect adhesion of the bonding agent.
Wood
Substrate surfaces must be sound, clean, dry and free from dirt, oil, grease, coatings, all loose particles and any other surface contaminants that could affect adhesion of the bonding agent.
Polyester / epoxy / ceramics / glass
Surfaces must be clean, dry, free from oil, grease and any other surface contaminants that could affect adhesion of the bonding agent.
SUBSTRATE PREPARATION
Concrete / masonry / mortar / stone
Substrates must be prepared mechanically using suitable abrasive blast cleaning, needle gunning, light scabbling, bush hammering, grinding or other suitable equipment to achieve an open textured gripping surface profile.
Steel
Surfaces must be prepared mechanically using suitable abrasive blast cleaning, grinding, rotating wire brush or other suitable equipment to achieve a bright metal finish with a surface profile to satisfy the necessary tensile adhesion strength requirement. Avoid dew point conditions before and during application.
Wood
Surfaces must be prepared by planing, sanding or other suitable equipment.
Polyester / epoxy
Surfaces must be prepared by abrading using suitable equipment.
Ceramics / glass
Surfaces must be prepared by abrading using suitable equipment. Do not apply to siliconised substrates.
All substrates
All dust and loose material must be completely removed from all substrate surfaces before application of the product by vacuum / dust removal equipment.
MIXING
Prior to mixing all parts, mix part A (resin) briefly using a mixing spindle attached to a slow speed electric mixer (max. 300 rpm). Add part B (hardener) to part A and mix parts A+B continuously for at least 3 minutes until a uniformly coloured smooth consistency mix has been achieved. To ensure thorough mixing pour materials into a clean container and mix again for approximately 1 minute. Over mixing must be avoided to minimise air entrainment. Mix full units only. Mixing time for A+B = 4,0 minutes. Mix only the quantity which can be used within its pot life.
CLEANING OF EQUIPMENT
Clean all tools and application equipment with Sika® Colma Cleaner immediately after use. Hardened material can only be mechanically removed.