Sika® Primer MR Fast

• EMICODE EC1^PLUS R
• LEED® EQc 4.2
• SCAQMD, Rule 1168
• BAAQMD, Reg. 8, Rule 51
• DER BLAUE ENGEL, RAL UZ 113

2-Component, water-based, epoxy resin compound

Sika® Primer MR Fast has a shelf life of 9 months from the date of production, if stored properly in undamaged, original, sealed packaging, and if the storage conditions are met.

Sika® Primer MR Fast shall be stored in dry conditions, protected from direct sunlight and at temperatures between +5 °C and +25 °C.

Sika® Primer MR Fast can be permanently exposed to dry heat ≤+50 °C.

Note: In order to avoid damage to the installed wood floor elements, surface temperature must not exceed +25 °C.

−40 °C min. / +70 °C max.

Component A : Component B = 2:1 (by weight)

+15 °C min. / +30 °C max., min. 3 °C above dew point temperature

< 75 %

During laying and until Sika® Primer MR Fast has fully cured, the substrate and ambient temperatures shall be between +15 °C and +30 °C without underfloor heating and between +20 °C and +30 °C with underfloor heating.

Permissible substrate moisture content without underfloor heating

Permissible substrate moisture content for use with underfloor heating

To check the moisture content, use the “Rubber Mat Test”, according to ASTM. A polyethylene sheet of > 1x1 m in dimension shall be taped to the concrete surface. Leave the polyethylene sheet in place for > 24 hours  prior to testing. This test allows for the detection of any condensed vapour transmissions.
Note: CM: carbid method, to determine the moisture content of the substrate. For all moisture contents, the quality of the substrates and surfaces, always follow the guidelines of the wood flooring manufacturer.

Note: Mixed Sika® Primer MR Fast stays liquid even when pot life is over. Do not use mixed material after pot life.

Note: Curing speed is dependent on temperature, relative humidity and absorption of substrates. High temperature and low r.h. decrease curing time. Cured material becomes transparent.

For the application of Sika® Primer MR Fast all generally accepted rules for wood flooring installation apply.

• The substrate must be clean, dry, sound and homogeneous, free from oils, grease, dust and loose or friable particles. Paint, cement laitance and other poorly adhering contaminants must be removed.
• At least 50% of the surface area must be cleared of residual adhesive (i.e. by grinding).
• Preliminary bond strength testing is recommended.
• Compressive strength: > 8 N/mm²
• Tensile Bond strength: > 0.8 N/mm²
• Concrete and/or cement screeds must be ground and cleaned with an industrial vacuum.
• Anhydrite screeds, including flowable anhydrite screeds must be ground and thoroughly cleaned with an industrial vacuum shortly before coating.
• Broadcast mastic asphalt must be broadcasted to excess and cleaned with an industrial vacuum.
• On fiber reinforced concrete any exposed fibers must be burnt off the surface.
• The guidelines of the screed floor manufacturer apply.
• For project specific advice, please contact our Technical Service Department.

Open the cardboard box and both cans inside of it. Plug the component B bottle upright on the component A can and wait until the component B bottle is empty, then close the cap of the component A can. After combining component A and component B in the correct ratio, shake the can thoroughly. A minimum shaking time of 1 minute is required. Re-shake is required if the mixture appearance is still inhomogeneous.

Clean all tools and application equipment immediately after use with water. Once cured, residual material can only be removed mechanically.