SikaRoof® MTC-22

• Liquid applied roof waterproofing kit according to ETAG 005, ETA-09/0139 issued by technical assessment body British Board of Agrément (BBA), Declaration of Performance 75346978, provided with the CE marking
• Root resistance according to FLL
• External fire performance: B_Roof(t1)
• Reaction to fire according to EN 13501-1: Euroclass E

Sikalastic®-601 BC applied in 1 coat, reinforced with Sika® Reemat Premium and sealed with 2 coats Sikalastic®-621 TC

Note: These figures are theoretical and do not include for any additional material required due to surface porosity, surface profile, variations in level and wastage.

Moisture-triggered aliphatic polyurethane

Please refer to individual Product Data Sheet

Please refer to individual Product Data Sheet

~2.2 mm

Strong resistance to a wide range of reagents including paraffin, petrol, fuel oil, white spirit, acid rain, detergents and moderate solutions of acids and alkalis. Some low molecular weight alcohols can soften the material. Contact Sika Technical Department for specific information.

* All values refer to the initial (properly cured, non-weathered) status of Sikalastic®-621 TC white (RAL 9016).

-30 °C min. / +80 °C max.

+5 °C min. / +35 °C max.

5 % r.h. min. / 85 % r.h. max.

+5 °C min. / +60 °C max.
≥ 3 °C above dew point

≤ 4 % pbw moisture content.
Test method: Sika®-Tramex meter
No rising moisture according to ASTM (Polyethylene-sheet).

 *Sikalastic® Metal Primer prevents migration of bituminous volatiles and improves long-term reflectivity.

For the consumption rates and waiting time / overcoating you please refer to the Product Data Sheet of the appropriate cleaner and primer. Other substrates must be tested for their compatibility. If in doubt, apply a test area first.

After four days the surface must be cleaned and primed with Sika® Reactivation Primer before continuing.
Note: Times are approximate and will be affected by changing ambient conditions particularly temperature and relative humidity.

* Be aware that impact of heavy rain or rain showers can physically damage the still liquid membrane.

Note: Times are approximate and will be affected by changing ambient conditions particularly temperature and relative humidity.

The surface must be sound, of sufficient strength, clean, dry and free of dirt, oil, grease and other contamination. Depending on the material the substrate must be primed or mechanically cleaned. Grinding may be necessary to level the surface. Suitable substrates are such as: concrete, bituminous felts and coatings, metal, brickwork, asbestos cement, ceramic tiles, wooden substrates.
For detailed information regarding substrate preparation and primer chart please refer to Method Statement.

Mixing is not required, however if the product is settled or separated on opening, stir gently but thoroughly in order to achieve a uniform colour. Stirring gently will minimise air entrainment.

Prior the application of SikaRoof® MTC-22 the priming coat if used must have cured tack-free. For the Waiting Time / Overcoating please refer to the Product Data Sheet of the appropriate primer. Damageable areas (handrails etc.) have to be protected with tape or plastic wrapping.
Please note, always begin with details prior to the installation of the horizontal surface.

1. Apply first coat of Sikalastic®-601 BC. Work only so far in advance that the material stays liquid
2. Roll in the Sikalastic® Reemat. Overlap the Reemat a minimum 5 centimetre and ensure overlaps are sufficiently wet to bond both layers. The roller may require only a little extra material to keep wetted but no further significant material needs to be added at this stage.
3. After the coat is dry enough to walk on, seal the roof area with second coat of Sikalastic®-621 TC.
4. For SikaRoof® MTC-22 a third coat of Sikalastic®-621 TC has to be applied.

Clean all tools and application equipment with Thinner S immediately after use. Hardened and/or cured material can only be removed mechanically.