Sikalastic®-625 N

• CE Marking and Decalaration of Performance to European Technical Assessment ETA-20/0073, based on ETAG 005 Part 1 and Part 6
• Fire Testing according to ENV 1187: Test Report No. 19823F, 19823K, 19823B, 19750A, 19750D, 19750G
• Fire Testing EN 13501-1, Sikalastic®-625 N, Warrington fire, Report No.WF 418126

Elastomeric aliphatic polyurethane

12 months from date of production

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

Note: For detailed reinforcement information refer to the Sika Method Statement: Sikalastic®-625 N

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 etc.

Flat Roof Waterproofing Only - 15 year expected durability

The build-up in the table corresponds to a reinforced waterproofing kit for flat and pitched roofs.

Flat Roof Waterproofing Only - 20 year expected durability

The build-up in the table corresponds to a reinforced waterproofing kit for flat and pitched roofs.

Stand Alone Gutter Systems

Waterproofing - 10 year expected durability

Waterproofing - 15 year expected durability

Asbestos & Profiled Metal Roof Sheets

Waterproofing Only - 10 Year expected durability

The build-up in the table corresponds to a locally reinforced waterproofing kit for metal and asbestos roofs.

Waterproofing Only - 15 Year expected durability

The build-up in the table corresponds to a locally reinforced waterproofing kit for metal and asbestos roofs.

Resistant to many chemicals. Contact Sika Technical Services for additional information.

-20 °C to +80 °C

Initial: 0,87

Initial: 0,88

Initial: 110

-20 °C min. / +80 °C max.

+2 °C min. / +30 °C max.

20 % min. / 85 % max.

+2 °C min. / +30 °C max.

Beware of condensation.
The substrate and uncured applied product must be at least +3 °C above dew point to reduce the risk of condensation or blooming on the surface of the applied product. Metal surfaces will be more prone to temperature fluctuations occurring and wind chill effects.

≤ 4% parts by weight

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

• Sika®-Tramex meter
• No rising moisture must be present according to ASTM (Polyethylene-sheet).

Important: Other substrates must be tested for their compatibility. To ensure compatibility, carry out preliminary trials.

Important: Adhesion and compatibility suitability must be verified practically on site before commencing contract.

Note: For consumption rates and waiting time / overcoating, refer to the individual Product Data Sheet of the appropriate primer.

Note: The material in opened containers must be applied before a surface skin occurs.

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

~1–2 hours

If left for a period of more than 7 days, the surface must be reactivated with Sika Reactivation Primer.

Important: The impact of heavy rain or rain showers can physically mark or damage the membrane in its liquid state.
Note: Application at higher than recommended film thicknesses may result in a prolonged “soft” feel to the coating. This will eventually cure and harden.
Note: Times are approximate and will be affected by changing ambient conditions particularly temperature and relative humidity.

Select the most appropriate equipment required for the project:

Substrate preparation equipment

• Abrasive blast cleaning / planing / scarifying or grinding equipment.
• Manual or mechanical wire brushes
• High pressure power washer

For other types of preparation equipment, contact Sika Technical Services

Mixing Equipment

• Electric single paddle mixer (300–400 rpm) with spiral paddle

For other types of preparation equipment, contact Sika Technical Services

Application Equipment

• Brush
• Roller
• Airless spray

For more detailed information refer to the Sika Method Statement: Sikalastic®-625 N

• The supporting structure must be of sufficient structural strength to apply all new and existing layers of the roof build-up. Complete roof system must be designed and secured against wind uplift loadings.
• Refer to the Sika Method Statement: Sikalastic®-625 N
• Suitable substrates: Cementitious, concrete, bituminous felt and coatings, brick, stone, asbestos cement, metal, wood, unglazed ceramic tiles

General

All contamination such as dust, loose and friable material that could affect final finish or reduce adhesion, must be completely removed from all surfaces before application of the product or subsequent products, preferably by industrial vacuuming  equipment.

• Sikalastic®-625 N is supplied ready for use.
• Before application, mix for at least 2 minutes or until the liquid and all the coloured pigment have achieved a uniform colour.

Asbestos & Profiled Metal Roof Sheets - Localised Reinforcement for Roof Areas Only

Sheet End Laps

Prepare and prime the corrugate roof sheet as appropriate.

Apply 6" (152.4mm) wide of Sika® Joint Tape SA to prepared substrate.

Remove 4–6” (10.2–15.2 cm) of release liner from underside of the Sika Joint Tape SA and position the tape centrally across the lap joint of the top and bottom sheet, and pressing firmly into place.

Continue to remove release liner, whilst moving across the lap joint.

Be careful to follow the profile of the metal sheet and ensure full and even
contact.

Ensure that the tape overlaps any end lap fixings by at least 25mm. Where this cannot be achieved, a separate piece of 3” (76.2mm) should be used to reinforce each fixing.

Once in-place, always apply additional pressure to the surface to fully activate the bonding process, compress any creases and remove any trapped air. Use a hard roller for best results.

Side Laps

Apply 6" (152.4mm) wide Sika® Joint Tape SA to the prepared substrate.

Remove 4–6” (10.2–15.2 cm) of release liner from the underside of the Sika® Joint Tape SA.

Position the tape centrally across the joint, and press into place. Continue to remove release liner, whilst moving down the joint and pressing firmly onto the substrate surface.

Ensure that the tape overlaps any side lap fixings by at least 25mm. Where this cannot be achieved, a separate piece of 3” (76.2mm) should be used to reinforce each fixing.

Once in-place, always apply additional pressure to the surface to fully activate the bonding process, compress any creases and remove any trapped air. Use a hard roller for best results.

Tape Embedment: In any application, a light coat of Sikalastic®-625 N must be applied to the surface and edges of Sika Joint Tape SA® and allowed to cure. The purpose of this is to waterproof the surface of the tape and ensure that the surface of the fabric is fully embedded in the main coating. This can be applied using a roller or brush.

Strictly follow installation procedures as defined in method statements, application manuals and working instructions which must always be adjusted to the actual site conditions.

Reference must be made to the Sika Method Statement: Sikalastic®-625 N

Gutter Joints - Metal Gutters - Bolted Joints/Fixings

Bridge each bolt head/fixing with Sika Flexistrip (minimum 50mm squares) by first removing the backing paper and applying light pressure to the patch edges to fix.

Encapsulate each fixing/joint detail using Sika Reemat Premium patches, cut to requirements and bedded in Sikalastic®-625 N applied at a minimum wet film thickness of 1000 microns. Allow to dry before continuing with the overall waterproofing.

Apply the fully reinforced system through the metal gutter as specified.

Gutter Joints - Metal Gutters - Bond Break

Introduce a 'bond break' at each gutter joint by first laying 50mm (minimum width) low tack de-bonding tape centred on the joint.

Apply a 'stripe' coat (200mm wide) of Sikalastic®-625 N to each seam/joint at a minimum wet film thickness of 1000 microns and whilst wet, Sika Flexitape Heavy (150mm) using a loaded brush to obliterate the tape. Allow to dry before continuing with the top coats.

Clean all tools and application equipment with Thinner C or xylene immediately after use. Hardened material can only be removed mechanically or with a proprietary paint stripper.