ONE PART PITCH-BASED POLYURETHANE ELASTOMERIC MEMBRANE

Surface Preparation
Concrete surfaces must be float or shutter finished. The surfaces must be free of cavities and projections. Blockwork or brickwork must be flush pointed and of a uniform finish.

The surfaces should be made dry, clean, dust an frost free to expose a sound, clean substrate.

Priming Application
Priming is not normally necessary on good quality concrete, however for particularly porous or metal surfaces, SpECtite HP600 Primer must be used.

SpECtite HP600 should be applied after the primer has become touch dry, usually 2-4 hours following application, but before it has fully reacted.

If the SpECtite HP600 is not applied within 48 hours after priming, the surfaces should be re-primed.

Application
SpECtite HP600 should be applied by brush, roller or airless spray equipment at a thickness of 1mm in two coats.

On vertical surfaces, it may be necessary to achieve the correct film thickness by applying two coats with lighter loading to avoid slump especially when working at a high ambient temperature. Apply 2 coat systems at right angles to each other to ensure an even coating application. If a flood test is to be done, allow a minimum curing period of 10 days. The first coat should be touch dry prior to the application of the second coat. The second coat should in any event be applied within 12 hours of the first coat becoming touch dry.

When continuing membrane application from day joints, an overlap of 250mm should be made.

Protection
In certain conditions, particularly where back filling against SpECtite HP600 is anticipated, protection board should be used.