POLYBOND Polybond Limited, Unit 6 William Street, Northam, Southampton, Hants. S014 5QH Tel: 023 80 223266 Fax: 08700 527587

General

Polytile is a two-pack polyurethane coating. The Polytile film has an appearance and hardness akin to a glazed tile or vitreous enamel, without the brittleness. It is applied like paint and gives a continuous surface, so there are no joins to allow the penetration of moisture, dirt or grease. The Polytile film when cured is inert, odourless and tasteless, and is therefore ideally suited for use in contact for foodstuffs.
Because of its 'glass-like' finish Polytile has excellent release properties. It is therefore of immense value in the lining of bins and hoppers where 'bridging' of flour and other foodstuffs are a constant problem. The Polytile system applied to the walls and sides of the hoppers, bins and silos eliminates all bridging problems. It has been applied successfully to all types of bins - metal, concrete or wood

Surface pre-treatment

The most effective pre-treatment is to grit or shot blast the surface to Swedish Standard SA2½. If grit blast equipment is not available or conditions preclude the use of the equipment then the whole area should be mechanically or manually prepared, i.e. disking or wire brushing. Care should be taken to ensure that all surfaces are dry and free from dust, grease, etc. before commencement of the coating programme. It is important to point out that the ultimate quality of the finish will depend on the pre-treatment method chosen. The best finish will only be obtained from starting with a fine, shotblasted surface and by spraying the finishing coats.

Coating Systems

1. Apply one coat of Geoplane Epoxy, preferably by brush to ensure good build and complete coverage. The recommended spread rate for this material is 10m² per litre which will give a dry film thickness of approximately 50 microns (2 thou).
2. Apply by brush or spray a first coat of Polytile Undercoat White. The recommended spread rate of Polytile Undercoat is 9.2m² per litre giving a dry film thickness of approximately 37 microns. (1 ½ thou).Allow a minimum of 4 hours before re-coating
3. Apply a second coat of Polytile Undercoat by brush or spray, off white. The spread rate should be 9.2m² per litre giving a coating thickness of 37 micron (1 ½ thou).
4. Apply a final coat of Polytile Finish Coat by brush or spray, colour normally White. The spread rate of this material should be approximately 37 microns (1 ½ microns).

The completed system will take 7 - 10 days to achieve maximum durability if cured at room temperature.
It is recommended that where work is carried out by a sub-contractor, he or she should make aware of the dry firm thickness required on the completed work. Although dry film are given above for each coat totalling 161 microns (6 ½thou) the lower limit for satisfactory durability and performance is 150 microns (5 ½ thou). It is also recommended that where panels are coated before erection, coatings are taken all round the edges of butted joints etc.

Concrete Surfaces

For the treatment of concrete bins the primer coat should be substituted by a coat of Polybond Q19 Water Based Epoxy Coating.
This should be applied preferably by a brush and a minimum of 4 days allowed for drying before application of subsequent coats. This period of time can be considerably reduced by the use of warm air blowers and ensuring a good flow of air across the surface. Once the primer coat has been applied, the subsequent coats may be applied as directed above.

Timber Surfaces

On wood surfaces the primer coat is not necessary. Where pigmented coats are not required, a single coat system of Polytile Clear will be equally satisfactory.

Health and Safety

See individual Safety Data sheets for Glopane Epoxy, Polytile and Polybond Q19.

Amendment date August 2003

The claims made in this document are made in good faith and are based on exhaustive tests carried out over a long period.
Polybond Ltd., their agents and their distributors cannot accept any liability for the behaviour of their materials in individual cases.

A printer friendly copy is available here

A Product Datasheet for Polytile is available here