Sikalastic®-851 R

Conformity with LEED v2009 IEQc 4.2: Low-Emitting Materials - Paints and Coatings

• Test report for root resistance following DIN 4062: report No.: P9638-1-E dated 29/05/2015

• Test report for crack bridging properties following DIN EN 1062-7: report No.: P 9638-2-E dated 29/05/2015

• Test report for fire classification according to EN 13501-1, following test method DIN EN ISO 11925-2,: report No. 903 0526000-2 dated 15/8/2015; reaction to fire performance: class E

Modified Polyurethane/ Polyurea-Hybrid

The product must be stored properly in original, unopened and undamaged sealed packaging in dry conditions at temperatures between +5 °C and +30 °C.Higher storage temperatures may reduce shelf life of product.Reference shall also be made to the storage recommendations within the safety data sheet.

All density values at +23 °C

Exposed Roof Waterproofing

Sikalastic®-851 R is applied in one coat and sealed with one coat Sikalastic®-621 or Sikalastic®-445

Non-Exposed Roof Waterproofing

Sikalastic®-851 R is applied in one or two coats

 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.

free of penetration of the roots free of growth into the ground

Sikalastic®-851 R is short term resistant to mastic asphalt (hot poured asphalt) applied at a max. of +240 °C.

Sikalastic®-851 R elastic properties are maintained at temperatures as low as -30 °C.

Sikalastic®-851 R is generally resistant to:

• Bitumen

• Alkalis

Exposed Roof Waterproofing

Non-Exposed Roof Waterproofing

Component A : Component B = 1 : 1 (by volume)

Component A : Component B = 1.04 : 1 (by weight)

+8 °C min. / +50 °C max.

80 % r.h. max

+8 °C min. / +55 °C max.

≥3 °C above dew point

The product can be applied on substrates with a moisture content of ≤ 4 % part by weight. The substrate must be visibly dry with no standing water.

The following test methods can be used to determine the substrate moisture content:

• Sika®-Tramex meter

• CM-measurement

• Oven-dry-method

No rising moisture according to ASTM (Polyethylene-sheet).

Before applying Sikalastic®-851 R on Sikafloor®-161 allow:

Before applying Sikalastic®-851 R on Sikalastic®-851 R allow:

Before applying Sikalastic®-621 or Sikalastic®-445 on Sikalastic®-851 R allow:

¹ Assuming that any dirt has been carefully removed and any contamination is avoided.

² If the maximum waiting time is exceeded, Sika® Concrete Primer has to be applied with a consumption rate of 100 g/m² as an adhesion promoter between the layers.  

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

¹Only for inspection or for application of next layer.

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.

For detailed information regarding substrate preparation and primer chart please refer to Method Statement No. 850 915 11.

Dose and mix with suitable two-component spray equipment. Maintain recommended product and hose temperature.

Recomended pressure:

Component A +  B 160–180 bar.

Ensure equal pressure of component A + B. The accuracy of pressure, mixing and dosage must be controlled regularly with the equipment.

Prior the application of Sikalastic®-851 R the priming coat if used must have cured tack-free. For the Waiting Time / Overcoating please refer to the PDS of the appropriate primer. Damageable areas (handrails etc.) have to be protected with tape or plastic wrapping.

Waterproofing:

Spray apply Sikalastic®-851 R with suitable two-component hot spray equipment. Possible suppliers of spray equipment are Gama, Graco, Isotherm, WiWa, Reaku etc.

UV Protection:

One layer of Sikalastic®-621 or Sikalastic®-445 applied either by roller or airless spray.   For more detailed application engineering information pls. refer to the appropriate method statement.

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