ACTFLEX CRACK PRO 1200PS Injection epoxy
High-strength medium-modulus structural epoxy injection adhesive
Fast-curing structural epoxy for injecting and filling cracks 3 to 8 mm wide.
ACTFLEX CRACK PRO 1200PS sizes and key figures
Two-component 1:1 epoxy adhesive for structural crack repair by pressure injection and gravity feed, and for bonding fresh concrete to hardened concrete. With kiln-dried aggregate it makes a spall repair mortar.
- Crack width
- 3–8 mminjection and gravity feed · TDS p2
- Mix ratio
- 1 : 1Part A to Part B · TDS p2
- Pack
- 600 mLdual cartridge · TDS p2
- Gel time
- 25–30 mintypical60 g mass · TDS p2
- Grind smooth
- 1 htypicalafter application, at 24°C · TDS p5
- Adhesive depth
- 12 mmminimum in gravity-feed repairs · TDS p2
- Compressive
- 55.22 MPatypicalASTM D695-15 · TDS p2
- Flexural
- 35.38 MPatypicalASTM D790-17 · TDS p2
- Per cartridge
- ≈ 10.0 mtypicalof 5 × 12 mm crack; about 16.7 m at 3 × 12 mm · TDS p3
From the FORSPEC data sheet, TDS-CRACKPRO1200PS · Revision 1 · 25 August 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.
Where ACTFLEX CRACK PRO 1200PS is used
Use it for
- Structural crack repair by injection and gravity feed, 3 to 8 mm wide
- Port injection of vertical cracks
- Bonding freshly mixed concrete to hardened concrete
- Void and cavity filling in concrete and masonry
- Epoxy mortar and spall repair with kiln-dried aggregate
- Anchoring adhesive for bolts and dowels
Know before you start
- Not for cracks under 3 mm: use CRACKLOCK E400L for 0.05–3 mm
- Not for cracks over 8 mm: use PROBOND 1100 for 3–20 mm
- Not for damp, wet or frosted substrates, or new concrete under 28 days old
- Not a waterproofing membrane, and not for contact with potable water
Its FORSPEC systems
How to apply ACTFLEX CRACK PRO 1200PS
- 01
Prepare
Concrete at least 28 days old, clean, sound, completely dry and roughened by grinding or scarifying. Remove dust, oil and laitance, vacuum, and wire-brush the crack.
- 02
Set up
Shake the cartridge 1 minute, stand it 1 minute, purge until both parts flow evenly, then fit the static mixer. Below 21°C, condition the product to 21–24°C first.
- 03
Gravity feed
Horizontal slabs: inject straight into the crack and top off until it holds a full section. Keep at least 12 mm adhesive depth. Use backer rod or sand in wider cracks.
- 04
Port injection
Vertical cracks: ports about 450 mm apart from the bottom. Cap the crack and ports with PROBOND 1100, let it cure, then inject port by port upward.
- 05
Spall mortar
Cut square edges into sound concrete, mix A and B, add 4 to 5 parts kiln-dried sand or aggregate by volume and trowel level. Maximum 70 mm per layer.
- 06
Finish
Remove excess shortly after application, before it goes tack-free. Grind smooth 1 hour after application. Coat or return to full traffic only after full cure.
A short guide from the data sheet. Read the full ACTFLEX CRACK PRO 1200PS TDS before you start.
Learn to install it
Hands-on FORSPEC training that covers ACTFLEX CRACK PRO 1200PS.
Drawings for the systems it goes in
FORSPEC standard details as PDF and DXF. Each sheet is a generic detail: the specification names the products.
ACTFLEX CRACK PRO 1200PS questions
What crack widths is CRACK PRO 1200PS for?
Cracks from 3 mm to 8 mm. Under 3 mm the TDS specifies CRACKLOCK E400L (0.05–3 mm). Over 8 mm it specifies PROBOND 1100 (3–20 mm).
How much do I need?
A 3 × 12 mm crack takes about 36 mL per metre, so a 600 mL cartridge covers about 16.7 m. A 5 × 12 mm crack takes about 60 mL per metre, about 10 m per cartridge (typical figures).
How far apart do I set injection ports?
About 450 mm centres from the bottom of a continuous vertical crack. On a discontinuous crack, put a port immediately above each point of discontinuity.
How soon can I grind it?
About 1 hour after application at 24°C (typical). Coating with paint or architectural coatings and return to full traffic wait until after full cure.
Can I use it on a damp crack?
No. The substrate and the environment must be completely dry, and new concrete must be at least 28 days old.
Can it make a spall repair mortar?
Yes. Mix Part A and B, add 4 to 5 parts kiln-dried sand or aggregate by volume, and place up to 70 mm per layer.
Used with ACTFLEX CRACK PRO 1200PS
ACTFLEX CRACK PRO 1200PS 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 CRACK PRO 1200PS.