SikaCeram®-428 Super Bond T
Multipurpose high performance elastic polyurethane tile adhesive with no vertical slip on deformable surfaces
SikaCeram®-428 Super Bond T is a two component, high performance, universal, elastomeric polyurethane resin adhesive used for high adhesion fixing on deformable surfaces with no vertical slip. It is particularly suitable for natural stone and marble sensitive to dampness and on absorbent and non-absorbent substrates. Interior and exterior use.
- Multipurpose
- Good workability
- No creep
- High performance
- Extremely flexible
- Highly thixotropic
- Excellent durability
- Resistant to ageing
- Adhesion to most construction materials
- Suitable for dry wall substrates
- High deformability
- Hardening without shrinkage
Usage
SikaCeram®-428 Super Bond T may only be used by experienced professionals.- Fixing ceramic tiles of all types and sizes on difficult substrates or ones liable to warp considerably
- Fixing natural stone and marble affected by humidity
- Fixing vitreous mosaic
- Fixing ceramic tiles to kitchen surfaces or work tops, to wood or iron surfaces
- Fixing on heating screeds
- Fixing thin and / or large tiles
Advantages
- Multipurpose
- Good workability
- No creep
- High performance
- Extremely flexible
- Highly thixotropic
- Excellent durability
- Resistant to ageing
- Adhesion to most construction materials
- Suitable for dry wall substrates
- High deformability
- Hardening without shrinkage
Packaging
Part A+B pre-batched | 5 kg set |
Part A | 4.6 kg container |
Part B | 0.4 kg container |
Colour
Part A+B mixed | White paste |
Part A | White viscous paste |
Part B | Transparent liquid |
Product Details
Product declaration
- R2T according to EN 12004-1
- R2T according to ISO 13007-1
Chemical base
Polyurethane resin and selected quartz
Shelf life
12 months from date of production
Storage conditions
The product must be stored properly in original, unopened and undamaged sealed packaging in dry conditions at temperatures between +10 °C and +40 °C. Protect from direct sunshine.
Density
Part A+B mixed | ~1.60 kg/L |
Part A | ~1.75 kg/L |
Part B | ~1.00 kg/L |
All density values at +30 °C.
Transverse deformation
Highly deformable | (EN 12004-2 / ISO 13007-2) |
Tensile adhesion strength
After > 20 min open time | ≥ 0.5 N/mm2 |
Shear Adhesion
Initial | ≥ 2 N/mm2 |
After water immersion | ≥ 2 N/mm2 |
After thermal shock | ≥ 2 N/mm2 |
Service temperature
-20 °C min. / +80 °C max.
Chemical resistance
Resistant to many chemicals. Contact Sika Technical Services for additional information.
Application
Slip resistance
≤ 0.5 mm | (EN 12004-2 / ISO 13007-2) |
Mixing ratio
Part A : Part B = 92 : 8 (by weight)
Layer thickness
Maximum | 4.0 mm |
Minimum | 1.5 mm |
For higher thickness application, please contact Sika Technical Services.
Ambient air temperature
+10 °C min. / +35 °C max.
Relative air humidity
65 % max.
Dew point
Beware of condensation. The substrate and uncured applied product must be at least +3 °C above dew point to reduce the risk of condensation or blooming on the surface of the applied product. Low temperatures and high humidity conditions increase the probability of blooming.
Substrate temperature
+10 °C min. / +35 °C max.
Substrate moisture content
≤ 4 % parts by weight
The following test methods can be used: Sika®-Tramex meter, CM-measurement or Oven-dry-method. No rising moisture according to ASTM (Polyethylene-sheet).
Pot life
~60 minutes (100 g mass, +30 °C)
Open time
~80 minutes | (EN 12004-2 / ISO 13007-2) |
Adjustability time
~80 minutes at +30 °C
Applied product ready for use
Grouting floors / Foot traffic | ~24 hours |
Grouting walls | ~12 hours |
Normal use | ~3 days |
Note: Values are obtained in laboratory condition at +25 °C. Higher temperatures will reduce the indicated waiting time, lower temperatures increase waiting time.
Consumption
Consumption is dependent on the substrate, surface profile, roughness, size of the tiles, the joints between them and application technique (i.e. single spreading / floating method or double spreading / buttering method). Apply product to a test area to calculate the exact consumption for the specific substrate conditions and proposed application.
As a guide for a single adhesive layer:
Size of tiles | Notched trowel size | Consumption |
Small | 3 mm | ~2.5 kg/m2 |
Medium / Large | 6 mm | ~4.5 kg/m2 |
These figures are theoretical and do not allow for any additional material due to surface porosity, surface profile, variations in level or wastage etc.
EQUIPMENT
MIXING
- Electric single paddle mixer (< 400 rpm) with spiral paddle
APPLICATION
- Notched trowel
- Rubber mallet
MIXING
Important: Mix full units only
Important: Avoid over-mixing to minimise air entrainment.
- Add Part B (hardener) to Part A (resin).
- Mix continuously for 3 minutes, until a uniform mix is achieved.
- During the final mixing stage, scrape down the sides and bottom of the mixing container with a flat or straight edge trowel at least once to ensure complete mixing.
APPLICATION
Important: Apply sufficient adhesive to ensure adequate ‘wetting’ of the backs of the tiles.
Important: Coverage on the back of the tiles must be > 60 %.
Important: Tiling must be carried out on freshly applied adhesive. Exert adequate pressure to ensure 100 % complete and uniform contact with the adhesive to achieve optimum adhesion.
Important: If a skin forms on the surface of the adhesive, immediately remove the adhesive layer with a trowel, discard material and apply a fresh layer of SikaCeram®-428 Super Bond T adhesive.
Important: Protect freshly applied material from extremely high or low (freezing) temperatures, rain, direct exposure to sun, for at least 12–24 hours from application.
Important: Avoid application in direct sunlight and/or strong wind / draughts.
Note: For tiles > 900 cm2 (30 × 30 cm), the double-spreading (buttering) technique is always recommended.
- Apply sufficient adhesive to the prepared fixing surfaces with the flat side of trowel.
- Comb additional adhesive with appropriate square notched trowel to the required bed thickness.
- Wherever needed (for large tiles), back butter the tiles for full bedding.
- Place tiles into wet, sticky adhesive and use rubber mallet to fully embed the tiles.
- Adjust tiles if required. Provide support wherever needed.
- Clean off surplus adhesive from tile face and between tile joints before the adhesive has dried.
CLEANING OF TOOLS
Clean all tools and application equipment with Sika® Thinner C immediately after use. Hardened material can only be mechanically removed.