Forspec

ACTFLEX ER300 Epoxy Injection Resin

$554.50 AUD
$554.50 AUD
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FORSPEC ACTFLEX ER300 is a two-component, solvent-free epoxy injection resin for repairing non-moving cracks in reinforced concrete. Its low viscosity supports pressure injection through mechanical packers, filling the crack depth and forming a rigid bond between prepared crack faces. Suitable applications include slabs, beams, columns, industrial floors and civil structures, with additional uses in steel plate bonding and concrete delamination repair. Structural repairs require an engineer’s rectification design. Stop active water ingress before injection.
  • Low viscosity supports penetration through fine to medium concrete cracks.
  • Rigid epoxy bond supports engineered structural crack repairs.
  • Manufacturer-stated non-shrink cure maintains crack-face contact.
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  • Two-component, solvent-free structural epoxy.
  • Low mixed viscosity of 500–800 cps at 25°C for pressure injection.
  • Rigid, non-shrink cure for non-moving cracks.
  • Bonds to prepared dry or slightly damp concrete.
  • Fills crack paths to restrict moisture and chloride ingress.
  • Metered dual-feed machine application through mechanical packers.
  • 1. Obtain the engineer’s crack rectification design. Confirm non-moving cracks 0.1–1.0 mm wide; assess displaced or live cracks before proceeding. Do not inject movement joints.
  • 2. Remove dust, laitance, grease, oil, curing compounds, coatings and debris using suitable mechanical preparation, oil-free air or vacuum. Concrete must be sound, clean, dry or slightly damp, with no running water. Apply at 10–30°C.
  • 3. Stop active ingress with ACTFLEX HYDROPLUG, or specify ACTFLEX PU200 where the crack carries water, following the approved system. Never inject ER300 into an active leak.
  • 4. Drill at 45–60° to intersect the crack at mid-depth, at 200–300 mm centres. Clear drilling dust and secure mechanical packers. Surface-seal wider or leaking crack lines with PROBOND 1100 where required; allow the seal to cure fully.
  • 5. Use the specified FORSPEC INJEXA SWDM 2500 dual-feed machine. Load Part A and Part B separately at the specified 2:1 ratio by weight. Do not premix, dilute, substitute a volume ratio or split kits. Check nozzle, connections and pressure calibration before starting.
  • 6. Inject from the lowest packer upwards. Start slowly at 0.5–1.0 MPa; increase only as required, never exceeding 2.5 MPa. When resin reaches the next port, cap the completed packer and continue. Follow the TDS refusal procedure, monitor leaks and record uptake at every port.
  • 7. Complete work within the approximately 35-minute pot life at 25°C/50% RH. Flush both lines before extended pauses and immediately after use with an SDS-permitted epoxy-compatible solvent. Do not leave mixed resin standing in bulk.
  • 8. At 25°C/50% RH, allow 18 hours before traffic/loading, packer removal and surface finishing. Patch holes with non-shrink grout or epoxy mortar; remove surface seal/excess resin mechanically. Full cure is 7 days. Allow longer in cool conditions; structural loading remains subject to the engineer’s approval.
  • 9. Inspect the repaired crack, retain injection records and complete engineer-specified verification after full cure. Read both component SDSs before use and follow the pressure-injection, PPE, ventilation, clean-up and disposal requirements.
  • Estimating: demand in mL/m = crack width (mm) × depth (mm). The TDS yields approx. 13.9 L per 15 kg kit. Example: 0.5 × 150 mm = 75 mL/m, approximately 185 theoretical metres per kit. Voids, branching, priming, mixers and flushing increase consumption; trial the first section.
  • 15 kg kit: 10 kg Part A resin + 5 kg Part B hardener; 2:1 by weight.
  • Mixed appearance: transparent to light yellow; density 1.06–1.10 g/cm³.
  • Application temperature: 10–30°C, ambient and substrate.
  • At 25°C/50% RH: approximately 35 min pot life; 6–8 h initial set; 18 h before traffic/loading; 7 days full cure.
  • Crack width: 0.1–1.0 mm; packers at 200–300 mm centres.
  • Initial injection pressure: 0.5–1.0 MPa; maximum 2.5 MPa.
  • Manufacturer characteristic strengths: compression >80 MPa (ASTM D695), tension >25 MPa (ASTM D638), flexure >45 MPa (ASTM D790).
  • These are manufacturer R&D values, not accredited certification or engineering design values. Obtain written Forspec confirmation for design use; structural adequacy requires the project engineer.
  • Shelf life: 12 months unopened, stored at 10–25°C.
  • TDS-ER300 Revision 1, issued 25 August 2026.
Technical Data Sheet Installation Guide Warranty Information

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Technical Specifications

Key technical properties of this product. Refer to the Technical Data Sheet for complete installation and performance information.

ClassificationTwo-component, rigid structural epoxy injection resin; manufacturer data, no accredited certificate stated in the current TDS
Mixing RatioPart A resin : Part B hardener = 2:1 by weight. Dual-feed machine meters and mixes at nozzle; do not premix.
CoverageCrack demand (mL/m) = width (mm) × depth (mm). Approx. 13.9 L/15 kg kit; theoretical metres = 13,900 ÷ (width × depth). Allow for voids, branching and equipment waste; confirm by trial injection.
Recommended CoatsNot applicable — injection to fill the crack path
Tensile Strength>25 MPa, ASTM D638; manufacturer R&D characteristic value, not for engineering design without written Forspec confirmation
Full Cure7 days at 25°C and 50% RH; temperature dependent
Suitable SubstratesSound, clean reinforced concrete, dry or slightly damp; prepared steel for plate bonding as designed
Internal / External UseInternal industrial flooring and external concrete/civil repair applications
Compressive strength>80 MPa, ASTM D695; manufacturer R&D characteristic value, design confirmation required
Flexural strength>45 MPa, ASTM D790; manufacturer R&D characteristic value, design confirmation required
View Technical Data Sheet

ACTFLEX ER300 FAQs

Can ACTFLEX ER300 repair moving or leaking cracks?
ER300 forms a rigid repair for non-moving concrete cracks 0.1–1.0 mm wide. Do not use it in movement joints or active leaks. Have displaced or moving cracks assessed by the project engineer. Stop flowing water with ACTFLEX HYDROPLUG, or specify ACTFLEX PU200 where the crack carries water, before proceeding with the approved repair sequence.
How are the components mixed and injected?
The 15 kg kit contains 10 kg resin (Part A) and 5 kg hardener (Part B), a 2:1 ratio by weight. The TDS specifies the FORSPEC INJEXA SWDM 2500 dual-feed machine: load the components separately; do not premix. It meters and mixes at the nozzle. Do not substitute a volume ratio, dilute the resin or split kits. Use the current TDS for equipment calibration and application.
How much ACTFLEX ER300 will I need?
The TDS gives demand in mL per metre as crack width (mm) × crack depth (mm). A 15 kg kit yields approximately 13.9 L on the stated 1.08 g/cm³ basis. Theoretical metres per kit = 13,900 ÷ (width × depth). At 0.5 mm wide × 150 mm deep, this is approximately 185 m. Actual usage is higher where there are voids, branching or porous concrete; allow for machine priming, mixer waste and flushing. Confirm consumption by trial injection.
When can the repaired concrete be loaded?
At 25°C and 50% RH, the TDS states approximately 35 minutes pot life, 6–8 hours initial set, 18 hours before traffic, loading, packer removal and surface finishing, and 7 days to full cure. Times vary with conditions; lower temperatures extend curing. Structural loading and verification remain subject to the engineer’s repair design and approval.
What preparation and injection pressure are required?
Prepare sound, clean concrete that is dry or slightly damp, with no running water. Install mechanical packers at 200–300 mm centres, drilling at 45–60° to intersect the crack at mid-depth. Seal the surface with PROBOND 1100 where required and let it cure. Inject from the lowest packer upwards, starting at 0.5–1.0 MPa; never exceed 2.5 MPa. Record uptake per packer and follow the current TDS and SDS.

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