Description

SikaProof® A-12 is an embossed polyolefin FPO sheet membrane for pre-applied fully bonded below ground waterproofing of reinforced concrete structures. Membrane thickness 1,2 mm. SikaProof® A-12 is coldapplied without heat or open flames to prepared substrates or onto formwork before fixing reinforcement and concrete placement. The membrane has self-adhesive longitudinal strips for bonding overlap joints and is laminated with a unique sealant and a nonwoven fleece backing layer which creates a bond with the cast concrete.

Uses

SikaProof® A-12 may only be used by experienced professionals.

Waterproofing, concrete protection and gas resistant membrane for basements and other below ground concrete structures against ground water ingress. Suitable for use on:

• Reinforced concrete base slabs
• Reinforced concrete walls with both single and double-faced formwork
• Extension and reconstruction works
• Prefabricated structures
• Shotcrete structures

Advantages

• Can be used as a methane and carbon dioxide resistant membrane when installed as a waterproofing membrane fully bonded to concrete according to BS:8485:2015+A1 2019.
• Will restrict the ingress of radon into buildings from naturally occurring sources
• Fully bonded to the reinforced concrete structure
• No lateral water underflow between the concrete structure and the membrane system
• Validated high watertightness
• High flexibility and crack-bridging
• Pre-applied, before fixing reinforcement and concrete placement
• Easy to install with fully adhered joints (no welding required)
• Cold-applied (no pre-heating or open flames)
• Good tear and impact resistant properties
• Temporarily resistant to weathering and UV-light during construction
• Highly durable and resistant to aging
• Resistant to aggressive elements in natural ground water and soil
• Can be combined with other approved Sika Waterproofing / Joint Sealing Systems