Sika® Primer MR Fast
Sika® Primer MR Fast is a 2-component epoxy primer for SikaBond wood flooring adhesives with moisture control and very low emissions.
- 2-Component
- Water-based epoxy, low odor
- Solvent-free
- Easy to apply, low viscosity
- Allows quick completion
- Suitable for surface hardening
- Suitable for use with underfloor heating
- Very low emissions
Usage
Sika® Primer MR Fast is designed for use in conjunction with SikaBond wood floor adhesives:- For moisture control on cement-based substrates with moisture contents of up to 4 % CM.
- For substrate consolidation on concrete, cement and anhydrite screeds and refurbished substrates.
- For adhesion promotion for broadcast mastic asphalt and on old adhesive residues.
Advantages
- 2-Component
- Water-based epoxy, low odor
- Solvent-free
- Easy to apply, low viscosity
- Allows quick completion
- Suitable for surface hardening
- Suitable for use with underfloor heating
- Very low emissions
Packaging
Component A | 2.8 kg plastic can |
Component B | 1.4 kg plastic can |
Component A+B | 4.2 kg cardboard box |
Colour
White, becomes transparent when cured
Product Details
ENVIRONMENTAL INFORMATION
- EMICODE EC1PLUS R
- LEED® EQc 4.2
- SCAQMD, Rule 1168
- BAAQMD, Reg. 8, Rule 51
- DER BLAUE ENGEL, RAL UZ 113
Chemical Base
2-Component, water-based, epoxy resin compound
Shelf Life
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.
Storage Conditions
Sika® Primer MR Fast shall be stored in dry conditions, protected from direct sunlight and at temperatures between +5 °C and +25 °C.
Density
Component A | ~1.10 kg/l |
Component B | ~1.05 kg/l |
Mixed | ~1.10 kg/l |
Thermal Resistance
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.
Service Temperature
−40 °C min. / +70 °C max.
Application
Mixing Ratio
Component A : Component B = 2:1 (by weight)
Ambient Air Temperature
+15 °C min. / +30 °C max., min. 3 °C above dew point temperature
Relative Air Humidity
< 75 %
Substrate Temperature
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.
Substrate Moisture Content
Permissible substrate moisture content without underfloor heating
| For cement screeds | <4 % CM |
| For anhydrite screeds | <0.5 % CM |
| For magnetite flooring | 3–12 % CM (depending on the organic content) |
Permissible substrate moisture content for use with underfloor heating
| For cement screeds | <4 % CM |
| For anhydrite screeds | <0.3 % |
| For magnetite flooring | 3–12 % CM (depending on the organic content) |
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.
Pot Life
| Ambient air temperature | Pot life |
| +15 °C | ~3 h |
| +23 °C | ~2 h |
| +30 °C | ~1 h |
Note: Mixed Sika® Primer MR Fast stays liquid even when pot life is over. Do not use mixed material after pot life.
Curing Time
| Conditions | Curing time |
| +15 °C / 35 % r.h. | ~5 h |
| +23 °C / 50 % r.h. | ~4 h |
| +30 °C / 75 % r.h. | ~3 h |
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.
Consumption
| Concrete and/or cement screeds and anhydrite screeds, including flowable anhydrite screeds | 150–250 g/m2, depending on the absorbency of the substrate. |
| Broadcast mastic asphalt | 100–200 g/m2 |
APPLICATION INSTRUCTIONS
For the application of Sika® Primer MR Fast all generally accepted rules for wood flooring installation apply.
SUBSTRATE PREPARATION
- 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.
MIXING
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.
CLEANING OF TOOLS
Clean all tools and application equipment immediately after use with water. Once cured, residual material can only be removed mechanically.