What is Sika® Primer-206 G+P and why choose it?
Sika® Primer-206 G+P is a black, pigmented, solvent-based polyurethane primer designed to promote adhesion between a wide range of substrates and one-component Sika® polyurethane adhesives. It reacts with ambient moisture to form a thin, durable bonding layer, ensuring reliable, long-lasting adhesion in professional glazing and industrial bonding applications.
Specifically formulated for bond-face pretreatment before applying Sika® 1‑component polyurethanes, this primer is easy to apply by brush, felt or foam applicator and offers consistent performance on glass, ceramic-coated glass, pre-coatings, painted surfaces, selected plastics and metals.
Main features
- Solvent-based polyurethane solution that cures with moisture to form a thin, adhesive-promoting film.
- Enhanced adhesion on float glass, ceramic‑coated glass, pre‑coatings, painted surfaces and certain plastics and metals.
- Easy application with brush, felt pad or foam applicator.
- Controlled consumption of approx. 50 ml/m² (depending on substrate porosity).
- Wide application temperature range from 5 °C to 40 °C; ideal surface temperature 15 °C to 25 °C.
- Single-coat system: applied once only, forming a thin but dense, continuous film.
- Compatible surface pretreatment with Sika® Aktivator‑100 (wipe on / wipe off method) prior to priming.
- Professional-grade product: intended for experienced professional users only.
- Pack sizes: 30 ml, 100 ml, 250 ml and 1000 ml cans.
Technical specifications
- Chemical base: Solvent‑based polyurethane solution / black poly‑isocyanate solution
- Colour (CQP001‑1): Black
- Physical state: Liquid
- Density: approx. 1.02 – 1.05 g/cm³ (20 °C)
- Viscosity (dynamic): approx. 10 mPa·s at 20 °C
- Solid content: approx. 36 – 40 %
- Application temperature: 5 °C – 40 °C
- Ideal application / surface temperature: 15 °C – 25 °C
- Application method: Brush, felt or foam applicator
- Typical consumption: approx. 50 ml/m² (depending on substrate porosity)
- Flash-off / airing time at ≥ 15 °C: about 10 minutes
- Flash-off / airing time at < 15 °C: about 30 minutes
- Maximum open time before bonding: 24 hours
- Shelf life: 9 months (stored in sealed containers, upright, dry, at ≤ 25 °C)
- Boiling point: > 77 °C
- Flash point: approx. −4 °C (closed cup)
- Auto‑ignition temperature: approx. 333 °C
- Explosion limits: approx. 2.1 – 11.5 % (v/v)
- Water solubility: Insoluble; reacts with water/moisture
- VOC content (indicative): approx. 57–61 % by weight
Applications and use cases
Typical substrates
- Float glass
- Ceramic‑coated glass (e.g. automotive windscreen frits)
- Pre‑coated surfaces
- Painted surfaces
- Certain plastics (including some transparent or translucent plastics)
- Certain metals
Typical use cases
- Pretreatment of glass and ceramic-print bond faces prior to bonding with Sika® 1‑component polyurethane adhesives.
- Direct glazing applications where windshields or other automotive glass parts are bonded with polyurethane adhesives.
- Industrial bonding where improved adhesion on coated, painted, plastic or metallic substrates is required before applying Sika® 1‑component polyurethane systems.
Surface preparation and application overview
- Substrates must be clean, dry and free from grease, oil, dust and other contaminants.
- Adhesion may be improved by mechanical pretreatments such as scuffing / light abrasion and cleaning.
- Pretreat the bond face with Sika® Aktivator‑100 using the wipe‑on, wipe‑off method and allow it to flash off.
- Shake Sika® Primer‑206 G+P thoroughly until the mixing balls move freely, then continue shaking for approx. one additional minute.
- Apply a thin but fully covering coat with a brush, felt or foam applicator. The product is applied once only; ensure dense, continuous coverage in this single pass.
- Immediately reseal the can with the inner plastic liner and cap after use to protect the moisture‑reactive formulation.
- For frequent use, dispose of the product approx. one month after opening; for infrequent use, after about two months. 100 ml cans should be discarded two weeks after opening; 30 ml cans are for single application.
- If gelation, phase separation or a significant increase in viscosity is observed, discard the primer immediately.
- Do not dilute or mix with any other substance.
- When used on transparent or translucent substrates (e.g. float glass, plastics), adequate UV protection of the bond line is mandatory.
FAQ – Sika® Primer‑206 G+P
- On which substrates can Sika® Primer‑206 G+P be used?
- It is used to improve adhesion on float glass, ceramic‑coated glass, pre‑coatings, painted surfaces and some plastics and metals. For stress‑crack‑sensitive materials, tests on original substrates are required.
- Which adhesives is this primer designed for?
- It is specifically formulated for the treatment of bond faces prior to applying Sika® 1‑component polyurethane adhesives.
- How many coats should I apply?
- Only one coat should be applied. This single application must provide a dense, continuous film.
- What is the recommended flash‑off time before bonding?
- At ≥ 15 °C, allow about 10 minutes; at < 15 °C, about 30 minutes. The maximum open time before bonding is 24 hours.
- Can I use the primer below 5 °C?
- If used below 5 °C, additional testing under the expected adverse conditions is mandatory to confirm performance.
- How should I store Sika® Primer‑206 G+P?
- Store cans upright, tightly sealed, in a cool, dry place at ≤ 25 °C. Protect from heat, direct sunlight, moisture and frost.
- What is the shelf life of unopened containers?
- The shelf life is 9 months when stored in sealed containers in an upright position at ≤ 25 °C.
- Is the product flammable?
- Yes. It is classified as a highly flammable liquid and vapour (Flam. Liq. 2, H225) with a flash point of approx. −4 °C. Keep away from heat, sparks, open flames and hot surfaces. No smoking.
- Does the product have health hazards?
- It is classified as causing serious eye irritation (H319), may cause an allergic skin reaction (H317), and may cause drowsiness or dizziness (H336). Repeated exposure may cause skin dryness or cracking (EUH066). It also contains isocyanates (EUH204).
- Is Sika® Primer‑206 G+P intended for DIY or consumer use?
- No. It is intended only for experienced professional users. The product is not intended for consumer use.
Section 14 – Transport information
Sika® Primer‑206 G+P is classified as a dangerous good for transport.
UN number and proper shipping name
- UN number: UN 1866
- UN proper shipping name (ADR): RESIN SOLUTION
- UN proper shipping name (IMDG): RESIN SOLUTION
- UN proper shipping name (IATA): Resin solution
Transport classification
- ADR class: 3 (Flammable liquids)
- IMDG class: 3 (Flammable liquids)
- IATA class: 3 (Flammable liquids)
Packing group and labelling
- Packing group: II (ADR / IMDG / IATA)
- ADR classification code: F1
- ADR hazard identification number: 33
- ADR tunnel restriction code: (D/E)
- Transport label: 3 (Flammable liquid)
- IMDG EmS code: F‑E, S‑E
- Environmentally hazardous: No (not classified as marine pollutant or environmentally hazardous for ADR/IATA).
Section 8 – Personal protective measures
The following individual protection measures are indicated in the Safety Data Sheets and must be observed during handling and application of Sika® Primer‑206 G+P.
General hygiene measures
- Ensure adequate ventilation or local exhaust in the working area.
- Avoid contact with eyes, skin and clothing.
- Do not breathe vapours or spray mist.
- Do not eat, drink or smoke while using the product.
- Wash hands before breaks and after work, and remove contaminated clothing immediately.
Eye and face protection
- Wear safety glasses with side shields complying with EN166.
- Keep an eye‑wash bottle with clean water available at the workplace.
Hand protection
- Wear chemical‑resistant, impervious gloves compliant with EN 374.
- Suitable for short exposure / splashes: butyl rubber / nitrile rubber gloves (> 0.1 mm).
- Suitable for prolonged exposure: Viton gloves (approx. 0.4 mm, breakthrough time > 30 minutes).
- Remove and dispose of contaminated gloves.
Skin and body protection
- Wear appropriate protective clothing, such as long‑sleeved workwear and long trousers.
- Use safety shoes according to EN ISO 20345.
- For mixing and stirring work, use rubber aprons and protective boots as additional protection.
Respiratory protection
- When ventilation is insufficient or exposure limits may be exceeded, wear an appropriate respiratory protective device.
- Use an organic vapour filter (Type A): A1 (< 1000 ppm), A2 (< 5000 ppm) or A3 (< 10000 ppm), depending on exposure level and local regulations.
- Respirator selection must be based on known or anticipated exposure levels and the working limits of the respirator.
Environmental protection
- Prevent the product from entering drains, surface water or soil.
- In case of accidental release into waterways or sewers, inform the relevant authorities.
Contenido generado por IA
