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ARDEX RA 88 PLUS 627ml multi-purpose epoxy repair adhesive, high compressive strength, non-sag, potable water approved
ARDEX RA 88 PLUS 627ml multi-purpose epoxy repair adhesive, high compressive strength, non-sag, potable water approved
ARDEX RA 88 PLUS 627ml multi-purpose epoxy repair adhesive, high compressive strength, non-sag, potable water approved
ARDEX RA 88 PLUS 627ml multi-purpose epoxy repair adhesive, high compressive strength, non-sag, potable water approved

Ardex RA 88 Plus Multi-Purpose Epoxy Repair Adhesive

A non-sag, two-part epoxy repair adhesive for concrete, masonry and other compatible construction substrates. Suits vertical and overhead patching, rigid crack repairs and bonding.

Vendor: Ardex
SKU: INJARDRA88
Availability: Out Of Stock
$143.73
$143.73
Prices do not include GST

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This item is supplied to order and is not confirmed as in stock at any store. For availability before visiting, email contact@adheseal.com.au.

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Flat-rate shipping $17.95 + GST (metro and standard zones). Excludes remote/regional/high-cost postcodes and certain items (DG, oversized, long-length, or bagged products 15 kg+). If your order includes any of these, we will contact you to arrange additional freight charges. Online purchases only.

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Download TDS Download SDS - Part A Download SDS - Part B Download Ardex RA 88 Plus Multi-Purpose Epoxy Repair Adhesive Certificate
Description  

ARDEX RA 88 Plus is a high-strength, non-sag two-part epoxy repair adhesive for filling, patching and rigidly bonding concrete and other suitable construction materials. Its trowelable paste consistency makes it particularly useful for vertical and overhead repairs where a low-viscosity injection resin would run out of the repair.

Why choose RA 88 Plus?

The ceramic-filled epoxy can be used for small concrete holes and spalls, rigid crack repairs, setting anchor bolts and bonding suitable metal, brick, wood, stone, block and concrete surfaces. It can also secure injection ports and cap cracks ahead of an appropriate low-viscosity structural injection product, such as ARDEX RA 142.

Where it fits

  • Vertical and overhead concrete patching with a non-drip epoxy paste.
  • Small rigid crack, hole and spall repairs on compatible prepared surfaces.
  • Fixing suitable anchor bolts, handrails and other rigid construction details.
  • Selected underwater tile repairs where ARDEX's system requirements are met.

Working and cure times

ARDEX lists an approximate 20-minute working time and a 2–3-hour window before full traffic or painting under suitable conditions. Temperatures, repair depth and other site conditions affect handling and cure; prepare the repair area before mixing or dispensing.

Important limitations

This is a rigid epoxy, not a flexible sealant for movement joints or active cracks. Large, deep masses of epoxy can generate excessive heat as they cure, so repairs must stay within the product's specified size limits. Confirm surface preparation, underwater repair suitability and coating compatibility for the actual application.

Common Questions  

Can ARDEX RA 88 Plus be used underwater?
It can be used to replace tiles underwater, but ARDEX does not recommend it for vertical underwater crack or spall repairs.

What is the working time?
About 45 minutes at 24°C.

How quickly does it become tack-free?
About 3 hours at 24°C.

Can it repair moving cracks?
No. It is a rigid epoxy and should not be used where the crack is subject to movement.

Uses & Benefits  
Non-sag two-component epoxy adhesive for rigid bonding, crack-repair setup, anchor bolts and small concrete repairs. Compressive strength is 87MPa to ASTM D695. Concrete-to-concrete bond strength is 20.1MPa to ASTM C882. Working time is about 45 minutes at 24°C. Tack-free cure is about 3 hours at 24°C. Meets AS/NZS 4020 for contact with potable water.
How To Apply  
Use on clean, sound prepared substrates. Mix the two components thoroughly in the specified ratio. For concrete spalls, place and trowel the non-sag epoxy into properly prepared small repair areas. For anchor bolts or rigid bonding, fully wet the prepared contact surfaces and position components within the working time. For pool tile replacement, apply to the dry tile and place it underwater as specified by ARDEX. At 24°C the working time is about 45 minutes and tack-free cure about 3 hours.
Limitations and Safety Info  
Do not use for cracks subject to movement. Use for small patch repairs only. Large or deep masses can generate excessive exotherm, swelling, smoke or cracking. Do not thin with solvents. Underwater use is limited to replacing tiles. Do not use it for vertical underwater crack or spall repair. The cured epoxy may discolour under UV. Before overcoating, sand the cured surface and avoid solvent-based coatings.
Suitable Substrates  
  • Concrete, brick, block and stone.
  • Metal.
  • Wood.
  • Prepared pool tiles for underwater replacement.
  • Selected ARDEX sheet-membrane termination details.

Ardex RA 88 Plus Multi-Purpose Epoxy Repair Adhesive Physical Properties

Ardex RA 88 Plus Multi-Purpose Epoxy Repair Adhesive Physical Properties
Property Value
Pot Life 90 mins @ 4°C, 45 mins @ 24°C, 20 mins @ 40°C
Service Temperature After Curing -7°C up to 50°C
Set Time 65 mins @ 4°C, 26 mins @ 24°C
Tack Free Time >6 hrs @ 4°C, 3 hrs @ 24°C
Compressive Strength 87 MPa @ 7 days
Bond Strength 16.9 MPa @ 2 days, 20.1 MPa @ 14 days
Bond Strength Plastic to Hardened Concrete 12.3 MPa @ 2 days
Water Resistance 0.32%
Shrinkage 0.00015% @ 48 hrs
Service Temperature -7ºC up to 50ºC
Water Absorption 0.32%

Ardex RA 88 Plus Multi-Purpose Epoxy Repair Adhesive - Use Cases

Here are some common examples on where Ardex RA 88 Plus Multi-Purpose Epoxy Repair Adhesive used by our customers.

Civil Construction

Potable Water Asset Sealing

Bonding and repairing materials within infrastructure that stores or conveys potable drinking water.

This epoxy is certified for direct contact with drinking water, ensuring safe and compliant repairs in critical water applications.

  • AS/NZS 4020 compliant
  • 0.32% water absorption
  • Bonds concrete, metal, wood
  • -7°C service temperature

Civil Construction

Overhead Concrete Repair

Repairing spalls, holes, or defects on concrete surfaces that are vertical or overhead and require structural integrity.

Its non-drip, non-sag properties ensure repairs hold shape without formwork, delivering high compressive strength and superior bond.

  • Non-drip, non-sag performance
  • 87 MPa compressive strength
  • 20.1 MPa concrete bond strength
  • 50°C service temperature

Waterproofing

Waterproofing Membrane Terminations

Sealing and securing sheet waterproofing membrane terminations in reglets or fixing overflashing details.

Provides superior bond strength and non-sag performance to reliably secure membrane edges and withstand flood testing conditions.

  • Bonds to concrete, metal
  • Non-drip, non-sag performance
  • AS/NZS4020 Potable Water
  • 3-hour cure @ 24ºC

Waterproofing

Waterproofing Reglet Termination

Securing and sealing the edges of sheet waterproofing membranes within reglets or termination details.

The non-sag consistency ensures a robust, tightly sealed termination point, preventing membrane delamination and water ingress.

  • Non-drip, non-sag performance
  • Secures ARDEX membranes
  • Bond strength to concrete
  • 3 hours @ 24°C cure

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