Restec Flexitec SP Primer

Description

Flexitec SP Primer is a specialist primer designed for use on synthetic single‑ply membranes such as FPO (flexible polyolefin), TPO (thermoplastic polyolefin), EPDM and PVC. These membranes are notoriously difficult to bond to, so the primer acts as a bridge between the membrane and the Flexitec resin system. The product is a single‑component, solvent‑free polyurethane and is supplied in a 0.8 kg metal bottle.

Key Features

• One‑component – no mixing or catalysing required
• Low consumption rate (0.03–0.05 kg/m²) giving excellent coverage.
• Suitable for EPDM, TPO, FPO and PVC single‑ply membranes.
• Solvent‑free and virtually odourless
• Drying time 1–6 hours depending on temperature.

Application

1. Ensure the single‑ply membrane is clean, dry and free from grease. Use Res‑Tec Cleaning Agent and a lint‑free cloth.
2. Shake or stir the primer thoroughly before use:
3. Brush apply a thin coat to the membrane. Avoid excess build‑up, particularly in corners.
4. Allow to dry. At 20 °C the primer dries in 1.5–3 hours; at lower temperatures it may take up to 6 hours. Do not over‑coat until the primer is dry.
5. Apply the Flexitec 2020 system within the same day. If the primed surface becomes contaminated, reapply primer.

Technical Data

• Pack size: 0.8 kg (approx. 0.9 L)
• Colour: Unpigmented (clear)
• Consumption: 0.03–0.05 kg/m² (approx. 16–26 m²/L)
• Application temperature: Air: +3 to +35 °C; Substrate: +3 to +50 °C.
• Drying time: 1–2 hours at 30 °C; 1.5–3 hours at 20 °C; 2–4 hours at 10 °C; 3–6 hours at 3 °C.
• Relative humidity: ≤ 90 %
• Density: 0.91 g/cm³.
• Shelf life: ≥ 6 months unopened when stored in a cool, dry, frost‑free place.

Usage Guidance

SP Primer should only be used on thermoplastic membranes. It is not required on standard felt, asphalt, concrete or timber substrates (use Flexitec 2020 Primer instead). Once opened, the primer has a limited pot life; reseal immediately after use and use within the same job. Always follow the Res‑Tec safety data sheet.

JJ Roofing Supplies & The Wimbledon Project  

JJ Roofing Supplies is proud to have worked alongside the prestigious Wimbledon, working with Restec to supply Flexitec 2020 materials in the signature Wimbledon Green. The Flexitec coated the pre-existing gully systems that surround the centre court. To see the case study, click here. 

Frequently Asked Questions (FAQs) 

What is the fire rating of Flexitec 2020?

Fire tested to BS 476-3 Rating: F.AA and EN 13501-5(4) Rating: BROOF(t4) – the highest rating a flat roof system can get, allowing unrestricted use under UK regs.

How is Restec Flexitec 2020 Resin applied?

Restec Flexitec 2020 Resin is applied in two coats. The first coat & second coat is used with a brush or roller. The resin can be applied in temperatures as low as one °C (with winter accelerator) or as high as 30°C.

Can Restec Flexitec 2020 Resin be used on all types of roofs?

Yes, Restec Flexitec 2020 Resin can be used on various roof types, including flat roofs, pitched roofs, and roofs with complex geometries. It adheres well to multiple substrates, such as concrete, timber, and metal.

How long can I expect Restec Flexitec 2020 Resin to last?

When properly installed and maintained, Restec Flexitec 2020 Resin can last over 25 years, providing reliable protection and performance for your roof.

Does Restec Flexitec 2020 Resin require regular maintenance?

While Restec Flexitec 2020 Resin is highly durable and requires minimal maintenance, it is advisable to conduct regular inspections and remove any debris or vegetation that may accumulate on the roof surface. Additionally, you may need to reapply a topcoat after several years to maintain

Need help with your order? Our knowledgeable staff can help you out with it. For personalised service, speak to an expert at 0333 700 1111 or drop an email at web.sales@jjroofing.co.uk