Technical Reference

Treatment Procedures.

Step-by-step waterproofing, structural repair and rehabilitation methods, grouped by the chemistry they use, each mapped to the Armstrong products that carry it out. Select a treatment to view the full procedure and product recommendations.

Choose a treatment

Treatment · Acrylic, rubberised & cool roof

Rubberised Elastomeric Coating

Grey rubberised membrane for cracked roofs and large concrete faces

Applications

Cracked or weathered terracesRoofs with old bitumenBridge piersLarge concrete facesBase layer of multi-layer systems

Procedure

Clean the surface of dirt, dust, oil, grease and other contamination. On large faces use mechanised buffing tools.
Groove and seal cracks with ROOFEXSEAL PU 212.
As a primer, apply one coat of RAINSEAL RWC 902 diluted with about 50% water.
Lay the reinforcement into a coat of RAINSEAL RWC 902 diluted with about 20% water: geo-fabric on concrete, fibre mesh on metal and GI sheets.
Apply the following coats of RAINSEAL RWC 902 with 20% water, each after the previous coat has dried. On bridge piers, three coats are applied.
Top-coat with RAINSEAL 200 or a cool roof coating where a white, reflective finish is wanted.

Important Suggestions

Concrete faces must be handed over without honeycombs, holes or undulations, and fully cured. Repair those first with polymer mortar.

Why This Treatment?

Rubberised and acrylic-bituminous coatings stretch 500% to 700%, so they suit cracked, moving or weathered roofs and old bitumen surfaces. RAINSEAL RWC 902 is used as the base coat with mesh in the Armstrong five-layer build-up.

Recommended Products

RAINSEAL RWC 902

Grey rubberised elastomeric flexible coating, 700% elongation. Used with fibre mesh or geo-fabric.

Dosage & Coverage

Primer coatRAINSEAL RWC 902 with about 50% water

Following coatsWith about 20% water