Sikalastic®-8850

Pure Polyurea

Product must be stored in original, unopened and undamaged sealed packaging in dry conditions at temperatures between +5 °C and +30 °C. Always refer to packaging.

Sikalastic®-8850 is resistant to de-icing salts, bitumen, alkalis, fresh and ground water and various chemicals. Contact Sika Technical Service for specific information.

Comp. A : Comp. B = 1 : 1

~2mm

+5 °C min.  / +50 °C max.

≤ 85 %

Beware of condensation.

The substrate and uncured coating finish must be at least 3 °C above dew point to reduce the risk of condensation.

+5 °C min. / +50 °C max.

Refer to primer product data sheet

Fully cured after 24 h (23 °C)

8–10 seconds

For overcoating with Sikalastic®-8850 or suitable UV resistant top coats allow:

~1 kg/m²/mm

Cementitious substrates (concrete) must be structurally sound and of sufficient compressive strength (minimum 25 N/mm²) with a minimum tensile strength of 1.5 N/mm².

Cementitious substrates and steel surfaces must be clean, dry and free of all contaminants such as dirt, oil, grease, existing coatings and surface treatments, etc.

Cementitious substrates

Must be prepared mechanically using suitable abrasive blast/water jetting cleaning equipment to remove cement laitance and achieve an open textured surface profile suitable for the product thickness.

Weak cementitious substrates must be removed and surface defects such as blow holes and voids must be fully exposed.

Priming, repairs to the substrate, filling of cracks, blowholes/voids and surface levelling must be carried out using appropriate products from the Sikafloor®, Sikadur® and Sikagard® range of materials. All dust, loose and friable material must be completely removed from all surfaces before application of the product, preferably by brush or vacuum. Products must be cured before applying Sikalastic®-8850.

For detailed information regarding substrate preparation and primer chart please refer to Method Statement.

Substrate Pre-Treatment Substrate Primer

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

Steel surfaces

Must be prepared mechanically using suitable abrasive blast/water jetting cleaning equipment to the requirements of the proposed manufacturer's corrosion protection system.

All dust, loose and friable material must be completely removed from all surfaces before application of the product, preferably by vacuum extraction equipment.

After preparation, apply suitable primer, contact Sika Technical Department for more information.

Dose and mix with a suitable air driven or electrical plural component heated spray equipment.

Both components must be heated up to the temperatures: Comp. A ( ISO): ~60 °C and Comp. B (Resin): ~80 °C.

The accuracy of mixing and dosage must be controlled regularly with the equipment. Thoroughly stir part B  (Resin) using a drum stirrer until a consistent colour is obtained.

Sikalastic®-8850 is spray applied in a continuous application to achieve a consistent thickness and surface finish.

Clean all tools with Thinner C immediately after use. The application equipment has to be cleaned and filled with Mesamoll. Hardened material can only be removed mechanically.