As an adhesion promoter, moisture barrier and substrate consolidator for timber flooring systems incorporating Sika Bond adhesives
Suitable for use on damp substrates with moisture contents above 5.5%
Excellent penetration on cement based substrates
Can be applied by brush or roller
Short waiting times before subsequent bonding
Stored in original sealed containers within the temperature range of +5°C to +35°C, this product will keep for a minimum of one (1) year.
Surfaces must be clean and free from all traces of loose materials, old coatings, curing membranes, release agents, laitance, oil and greases etc. Substrate compressive strength should be at least 25MPa and cohesive bond strength at least 1.5MPa.
Structurally unsound layers and surface contaminants must be mechanically removed by abrasive blasting, blast tracking or grinding. Substrates heavily impregnated with oil must be cleaned by torching or suitable solvent cleaning methods. To check that all traces of oil have been completely removed, sprinkle a few drops of water over the surface. If all the water is quickly absorbed, the surface is sufficiently oil and grease free. If the water forms into globules that remain on the surface, further thorough treatment of the concrete is necessary.
The moisture content should be measured in accordance with the Floor Coverings Standard, AS1884-1985. A method of testing concrete moisture is given in the appendix of this standard.
When the moisture content of the concrete is found to be below 5.5%, the substrate is considered suitable for SikaBond products to be applied without a primer. When the moisture content of the concrete is found to be between 5.5% and 10%, Sika Primer MB must be used as a primer before using SikaBond products. It is recommended to always apply Sika Primer MB to slab on ground situations.
When the moisture content of recently placed concrete is greater than the 10%, EpoCem should be used as a temporary moisture barrier. Sika Primer- MB should then be used as a prime coat before applying SikaBond products. When priming with Sika Primer-MB, a continuous visible film of cured epoxy must be observed on the surface. The application rate will depend on the porosity of the substrate. Older slabs indicating high moisture readings should be investigated to identify why the moisture content is high before proceeding.
Mechanically mix components A and B using a electric drill in the correct ratio for 2 to 3 minutes at a low speed (300 to 450 rev/min) until a completely homogenous consistency is obtained.
Do not attempt to manually mix Sika Primer MB as its curing properties will be affected.
Always mix the full kit in small amounts, partially.
Do not make up more material than can be comfortably applied within the potlife. Heat is generated during mixing as a result of exothermic reaction.