SIKAPRIMER 215

What Sika Primer-215 is and why choose it

Sika Primer-215 is a non-pigmented, solvent-based polyurethane primer designed to promote adhesion on a wide range of plastics, wood and porous substrates before bonding with Sikaflex adhesives and sealants. It reacts with ambient moisture to form a thin, active layer that improves the bond between the substrate and the adhesive. Its low-viscosity, clear formulation is easy to apply with brush, felt or foam applicators and is intended for use by experienced professional users.

Main features

• Solvent-based polyurethane primer that forms a reactive bonding layer.
• Colourless to slightly yellow liquid for discreet priming on visible surfaces.
• Enhanced adhesion on many plastics, timber and other porous substrates.
• Easy application by brush, felt or foam applicator in a single, thin coat.
• Wide application temperature range from 5 °C to 40 °C (ideal 15 °C to 25 °C).
• Typical coverage around 50 g/m², depending on substrate porosity.
• Moisture-reactive system – forms a thin, effective priming film after flash-off.
• Suitable packaging sizes (e.g. 30 ml single-use, 250 ml and 1000 ml cans) for workshop or production use.
• Manufactured under ISO 9001/14001 quality and environmental management systems.

Technical specifications

• Chemical base: Solvent-based polyurethane solution (polyiisocyanate based).
• Appearance / colour: Colourless, slightly yellow / transparent.
• Physical state: Liquid, ester-like odour.
• Solid content: Approx. 34 %.
• Density: Approx. 1.0 kg/l at 20 °C.
• Viscosity: Approx. 20–35 mPas at 20–23 °C.
• Boiling point: Approx. 77 °C.
• Flash point: Consultar ficha técnica del fabricante.
• Auto-ignition temperature: Approx. 333–>400 °C.
• Lower flammability limit: Approx. 2 % vol.
• Upper flammability limit: Approx. 12 % vol.
• Vapour pressure: Approx. 60 hPa at 20 °C.
• VOC content: Approx. 65.9 % w/w.
• Application temperature (substrate and ambient): 5–40 °C (recommended 10–35 °C; ideal 15–25 °C).
• Application method: Brush, felt or foam applicator, applied once only in one direction.
• Coverage: Approx. 50–150 g/m² depending on substrate porosity.
• Flash-off / drying time: Approx. 30 minutes to 24 hours, depending on temperature and conditions.
• Shelf life: 12 months in unopened, upright containers stored in a dry place at ≤ 25 °C.
• Water solubility: Insoluble; reacts with water.

Applications and use cases

Suitable substrates

• Many plastics such as GRP, epoxy resins, PVC and ABS.
• Timber and wood substrates.
• Certain porous materials, including concrete.

Due to the wide variability in plastic formulations, preliminary tests must always be carried out on original substrates under production conditions to confirm adhesion and compatibility.

Substrates to avoid

• Plastics that are prone to internal stress and stress cracking, such as acrylics or polycarbonates.
• Transparent or translucent plastics without adequate additional UV protection on the bonded system.

Typical use cases

• Pretreatment of plastic components prior to bonding with Sikaflex adhesives in industrial or construction applications.
• Priming of GRP or epoxy composite parts before sealing.
• Improving adhesion on PVC or ABS profiles and fittings.
• Pretreatment of timber elements and selected porous substrates before bonding.

Summary of application method

1. Ensure surfaces are clean, dry and free from grease, oil, dust and other contaminants.
2. Where required, pre-clean with suitable cleaners (for example, the product information mentions Sika Cleaner 205) and consider scuffing or activating to improve adhesion.
3. Shake or mix the primer as recommended by the manufacturer. Consultar ficha técnica del fabricante.
4. Apply a thin but fully covering coat of Sika Primer-215 with a brush, felt or foam applicator in one direction only.
5. Apply only one coat and ensure it provides adequately dense coverage.
6. Allow the primer to dry within the indicated flash-off / drying time before applying Sikaflex adhesive or sealant.
7. Immediately after use, tightly reseal the container with the inner plastic liner and cap.

Sika Primer-215 is a moisture-reactive system. Once opened, product quality diminishes with time; frequent-use containers should be disposed of approximately one month after opening, and infrequently used containers after about two months. 30 ml cans are intended for single application only. Discard the product immediately if gelling, phase separation or a significant increase in viscosity is observed. Never dilute or mix this primer with other substances.

FAQ – Sika Primer-215

1. What is Sika Primer-215 used for?

Sika Primer-215 is used as a solvent-based primer to improve adhesion of Sikaflex adhesives and sealants on many plastics, timber and porous substrates such as GRP, epoxy resins, PVC, ABS, wood and concrete.

2. Can I use Sika Primer-215 on all plastics?

No. Preliminary tests on each specific plastic are mandatory because plastic formulations vary. It must not be used on plastics prone to internal stresses and stress cracking, such as acrylics or polycarbonates, and substrates sensitive to isocyanates require special attention.

3. How should I apply the primer?

Clean and dry the surface, then apply a single, thin but continuous coat of Sika Primer-215 using a brush, felt or foam applicator, generally in one direction. Do not apply multiple coats and ensure full coverage.

4. What is the recommended application temperature?

The primer can be applied between about 5 °C and 40 °C, with a more restricted working range of approximately 10 °C to 35 °C. Ideal surface and ambient temperatures are between 15 °C and 25 °C.

5. How long should I wait before applying the adhesive?

The drying (flash-off) time is typically between 30 minutes and 24 hours, depending on the temperature and conditions. Consultar ficha técnica del fabricante for exact times in specific situations.

6. What is the shelf life of Sika Primer-215?

The shelf life is 12 months when stored unopened in upright position in a cool, dry place at ≤ 25 °C. Once opened, containers used frequently should be discarded after about one month, and those used infrequently after about two months.

7. How much primer do I need?

Typical coverage is around 50–150 g/m², depending on substrate porosity. A more porous substrate will require more product to achieve a continuous film.

8. Can I dilute or mix Sika Primer-215 with other products?

No. The primer must never be diluted or mixed with any other substances.

9. Is additional protection required on transparent plastics?

Yes. When Sika Primer-215 is used on transparent or translucent substrates (such as some plastics), adequate UV protection of the bonded system is mandatory.

Section 14 – Transport information

Sika Primer-215 is classified as a flammable liquid for transport. The following information is based on the supplied Safety Data Sheets and applies to the product as packaged by the manufacturer:

• UN number: UN 1866
• Proper shipping name (ADR/RID, ADG): RESIN SOLUTION
• Proper shipping name (IATA): Resin solution
• Proper shipping name (IMDG): RESIN SOLUTION
• Transport hazard class: Class 3 (Flammable liquid)
• Packing group: II
• Label: 3 (Flammable liquid)
• EmS code (IMDG): F-E, S-E
• Marine pollutant: No
• Hazchem code (Australia): •3YE

The transport classification provided is for informational purposes only and is based on the properties of the unpackaged material. Actual transport requirements may vary depending on mode of transport, packaging size and regional or national regulations.

Section 8 – Personal protective measures

The following measures are summarised from the Safety Data Sheets and apply to professional users handling Sika Primer-215.

Exposure control and general hygiene

• Use adequate local exhaust or general ventilation to control vapour levels and avoid inhalation.
• Avoid breathing vapours, mists or spray.
• Avoid contact with skin, eyes and clothing.
• Do not eat, drink or smoke while using the product. Wash hands before breaks and after work.
• Remove contaminated clothing immediately and wash before reuse.

Respiratory protection

• If ventilation is insufficient, wear appropriate respiratory protection.
• Selection of respirator must be based on expected exposure levels and safe working limits.
• Recommended filter type: organic vapour filter Type A.

Hand protection

• Wear chemical-resistant, impervious gloves when handling the product.
• Recommended glove materials: butyl rubber / nitrile rubber.
• Inspect and replace gloves regularly; remove contaminated gloves immediately.

Eye and face protection

• Use safety glasses to protect against splashes.

Skin and body protection

• Wear suitable work clothing such as long-sleeved garments, long trousers and safety shoes.
• Protective clothing should be made of cotton.

Additional handling precautions

• Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
• Use explosion-proof electrical, ventilation and lighting equipment where required.
• Use only non-sparking tools and take precautions to prevent electrostatic discharge.

*Contenido generado por IA