SikaProof A+ 08 Membrane 2.0m x 25m

SikaProof A+ 08 – 0.8mm Fully Bonded FPO Waterproof Membrane System for Below Ground Concrete

SikaProof A+ 08 is a high-performance, fully bonded FPO (Flexible Polyolefin) sheet membrane designed for pre-applied and post-applied waterproofing of reinforced concrete structures. Featuring Sika’s advanced A+ dual-bond technology, the membrane forms both a mechanical and chemical bond with fresh or hardened concrete, preventing lateral water migration and ensuring long-term watertight protection.

At 0.8mm thickness, SikaProof A+ 08 delivers reliable waterproofing for basements, foundations, tunnels, and below-ground structures where durability and leak prevention are critical. The system includes complementary accessories such as joint tapes and adhesives, creating a complete waterproofing solution for new build and refurbishment applications.

Unlike standard sheet membranes, the A+ system prevents water from tracking behind the membrane, significantly reducing the risk of hidden leaks and structural damage. It is cold-applied without heat or naked flames, making it safe and efficient for on-site installation.

Key Benefits

• Dual bond technology prevents lateral water migration
• Fully bonded system for maximum waterproofing security
• 0.8mm FPO membrane for durable below-ground protection
• Suitable for pre-applied and post-applied applications
• Cold applied – no heat or open flames required
• High resistance to groundwater, ageing, and chemicals
• Crack-bridging capability for structural movement
• Suitable for basements, tunnels, and reinforced concrete structures
• Compatible with full SikaProof A+ system accessories
• Can act as a barrier to gases including radon and methane

Typical Applications

• Basement waterproofing systems
• Below-ground reinforced concrete structures
• Raft foundations and pile caps
• Retaining walls and lift pits
• Tunnels and underground structures
• Water-retaining and water-excluding structures

Technical Information

• Thickness: 0.8mm
• Material: Flexible Polyolefin (FPO)
• Colour: Yellow / White backing layer
• Application: Pre-applied or post-applied
• Installation method: Cold applied
• Bonding: Full mechanical and chemical bond to concrete
• Waterproofing type: Fully bonded system (Type A barrier protection)
• Resistance: Groundwater, soil contaminants, ageing
• Gas resistance: Methane, radon (system dependent)

System Components (A+ System)

• SikaProof A+ membrane sheets
• SikaProof Tape A+ (joint sealing)
• SikaProof ExTape / detailing tapes
• SikaProof Adhesive (for post-applied use)
• Compatible primers and accessories

Installation Overview

SikaProof A+ 08 can be installed either before concrete placement (pre-applied) or onto cured concrete surfaces (post-applied). The membrane is laid onto the substrate or formwork, with sealed overlaps using system tapes. Once concrete is poured, the membrane bonds fully to the structure, preventing water ingress and eliminating water tracking behind the membrane.

FAQs

What is the difference between SikaProof A and A+?
SikaProof A+ features dual bond technology that prevents lateral water migration, whereas standard A membranes do not provide the same level of protection.

Can SikaProof A+ 08 be applied after concrete is poured?
Yes, it can be used as both a pre-applied and post-applied waterproofing system using the correct adhesives and accessories.

Does it require heat or torching?
No, the system is cold applied and does not require heat or open flames.

Is it suitable for basements?
Yes, it is specifically designed for below-ground waterproofing including basements and foundations.

Does it protect against ground gases?
Yes, when installed as part of the full system, it can act as a barrier to gases such as radon and methane.

Downloads

Data Sheet - SikaProof A+ 08 Membrane