ACTFLEX 500 NP PRIMER Non-porous primer
Certified low-VOC high-adhesion primer for non-porous, dense and smooth substrates
Certified low-VOC primer that grips metal, glass, plastic, tiles and dense concrete without acid etching.
ACTFLEX 500 NP PRIMER coverage, coats and cure times
Certified low-VOC viscous paste primer for surfaces that absorbing primers cannot key to. It goes under FORSPEC membranes, adhesives and mortars, indoors and outdoors.
- Coverage
- 6–10 m²/Ltypicalneat, on non-porous substrates · TDS p2
- Diluted 1:1
- 12–20 m²typicalper litre of diluted product · TDS p2
- Consumption
- 0.10–0.17 L/m²typicalapprox., neat · TDS p2
- Coats
- 1single coat · TDS p2
- Drying
- 30–45 minstated at 23°C and 50% RH · TDS p2
- Dilution
- 1 : 1water by volume: levelling compounds, absorbent bases · TDS p2
- Service temp
- −10 to +65°Cservice temperature · TDS p2
- 15 L pack
- 90–150 m²typicalneat, at 6–10 m²/L · TDS p2
- Solids
- ≈ 97%typicalnon-volatile content, worked out from the VOC certificate · TDS p2
From the FORSPEC data sheet, TDS-ACTFLEX500NP · Revision 2 · 12 November 2026. Times are at 25°C and 50% relative humidity unless the data sheet says otherwise. Typical = FORSPEC’s own typical value, not a laboratory-certified one.
ACTFLEX 500 NP on site
More FORSPEC jobs
Where ACTFLEX 500 NP is used
Use it for
- Under FORSPEC membranes, adhesives and mortars on non-porous bases
- Galvanised iron, zincalume, aluminium and stainless steel
- Precast, tilt-up and glass-reinforced concrete
- Existing ceramic tiles and natural stone
- Glass and rigid plastic surfaces
- Polymer mortars and smooth self-levelling compounds
Know before you start
- Not a waterproofing membrane or moisture barrier
- Not for rising moisture, negative hydrostatic pressure or damp substrates
- Not under solvent-based coatings or adhesives: use ACTFLEX SUPERBOND 007 or 700 PU PRIMER
- PVC and aluminium adhesion may be limited: sand them and test a trial area first
How to apply ACTFLEX 500 NP
- 01
Prepare
Clean, sound and dry, free of dust, oil, grease, curing compounds and old coatings. Sand or abrade metal and plastic: mandatory on PVC and aluminium. Vacuum or blow clean before priming.
- 02
Tiles
Over existing tiles, make sure every tile is sound and firmly bonded. Replace or reinstate any drummy or loose tile before priming.
- 03
Stir
Stir well. For floor levelling compounds and highly absorbent substrates only, dilute 1:1 by volume with water. No other dilution is approved.
- 04
Apply
Brush or long-nap roller, an even continuous film at 6–10 m² per litre. Cover all edges, junctions and transitions. Avoid over-application and puddling.
- 05
Dry
30–45 minutes at 23°C and 50% RH. Cold or humid conditions take longer, so confirm it is dry on site. Check for missed areas, pinholes and glossy puddles.
- 06
Overcoat
Apply FORSPEC membranes, coatings, adhesives or mortars once the primer is completely dry. Over existing tiles in wet areas, overcoat with a suitable under-tile membrane system.
A short guide from the data sheet. Read the full ACTFLEX 500 NP TDS before you start.
ACTFLEX 500 NP test reports and compliance
- VOC content
- 32 g/L, under the Green Star limit of 65 g/LCETEC certificate P26050125, tested by FORAY (NATA 1231), issued 29 May 2026
Download the reports
Results as stated in the data sheet, TDS-ACTFLEX500NP · Revision 2 · 12 November 2026. Warranty up to 25 years, depending on the system: ask FORSPEC which term applies to your system.
ACTFLEX 500 NP questions
What is ACTFLEX 500 NP PRIMER for?
Surfaces that absorbing primers cannot key to: metals, glass, rigid plastics, existing tiles and stone, precast and dense concrete. It goes under FORSPEC membranes, adhesives and mortars.
Can I thin it with water?
Only 1:1 by volume with water, and only for floor levelling compounds and highly absorbent substrates. No other dilution is approved.
How much do I need?
Neat, 6–10 m² per litre. A 4 L pack covers about 24–40 m² and a 15 L pack about 90–150 m². These are typical values.
Will it stick to PVC and aluminium?
Adhesion may be limited. Sanding is mandatory on PVC and aluminium and a trial area is required before you go ahead.
Can I put solvent-based products over it?
No. For solvent-based systems specify ACTFLEX SUPERBOND 007 or ACTFLEX 700 PU PRIMER.
How long before I overcoat?
Drying is 30–45 minutes at 23°C and 50% RH. Overcoat once it is completely dry. Low temperature or high humidity makes it longer.
Used with ACTFLEX 500 NP
ACTFLEX 500 NP TDS and SDS
Always work from the current data sheet. Every FORSPEC TDS and SDS →
Specify it. Or buy it.
Send the drawings or photos and FORSPEC comes back with the system, the details and the quantities. Or find a FORSPEC stockist for ACTFLEX 500 NP.