Introduction
Prior to the application of a Drytech coating system, the substrate must be prepared to ensure that it is sound, clean and free from organic growth. This ensures that the coating is able o adhere to the surface and consequently, that it will give maximum performance throughout its design life. As part of these reparations, primers and other preparatory treatments may sometimes be required. For detailed information about recommended treatments for a specific project, please consult either our Technical Sales or Export Department at our head office in Preston. Safety data sheets for all products are available on request.


Biowash Concentrate


Composition
Biowash is a biocidal treatment, which is supplied in the form of a concentrate with a blue dye to aid identification after application. A non-dyed version is also available for use under clear coatings such as Decothane Clearglaze.

Uses
Biowash is designed to kill active mould, fungal and bacterial spores prior to the application of membranes and coatings. Unlike many conventional systems, it remains active after its initial application - guarding against contamination for up to two years.

Benefits
The product’s ability to provide continuous, active protection ensures the effective elimination of spores in the substrate and therefore safeguards any subsequently applied coatings in the range. Biowash is approved under the Control of Pesticides Regulations 1986 for use as directed. HSE No. 5853.

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Bonding Primer


Composition
Bonding Primer is a rapid curing, water based primer consisting of two components; a pre-reacted epoxy resin dispersed in water (Part A), and a waterborne modified polyamine solution (Part B). In its wet mixed state, it is milky green and slightly viscous.

Uses
Suitable for use on most sound and eroded building surfaces where both a penetrative and surface-lying effect is needed. Substrates include concrete (including damp and partially cured), cementitious renders, screeds and mortars, bituminous surfaces (e.g. asphalt), roofing felts, insulation foams, wooden protrusions, previously painted surfaces, glass reinforced polyester and many existing membranes prior to re-coating.

Benefits
The product’s rapid curing properties allow faster contract completion and consequent savings on site/labour costs. Furthermore, because the epoxy component is pre- reacted, it constitutes the lowest hazard form of epoxy system currently available.

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Epoxy Metal Primer


Composition
Epoxy Metal Primer is a tough, amide curing, two pack system offering a high level of corrosion resistance. It consists of a grey base (Part A) and an activator (Part B).

Uses
For the priming of most metallic substrates prior to the application of Drytech coating systems. It also constitutes an effective anti-corrosive treatment in its own right.

Benefits
The primer confers effective long term protection against corrosion and ensures excellent adhesion between metal substrates and the specified Drytech coating.

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Aqueous Metal Primer


Composition
Aqueous Metal Primer is a waterborne blend of a metal reactive acrylic based emulsion, electrochemically active anti-corrosive pigments, a barrier additive and anti-flash rust agents. It has a plum-red colour in its wet state and an oxide red colour when dry.

Uses
For the priming of some metallic substrates prior to the application of Drytech coatings. It also constitutes an effective anti-corrosive coating in its own right. Compatible substrates include ferrous metals, galvanised surfaces (degreased), stainless steel, zinc, lead, aluminium, tin and copper alloys. Required preparation can be limited to wire brushing, ranging through to blast cleaning.

Benefits
The primer has a low V.O.C. (92.4 g./l.) and has an extremely low hazard profile. It exhibits a high degree of flexibility, good adhesion and dries rapidly in normal conditions.

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DGT Tiecoat Sealer


Composition
Tiecoat Sealer is a polyurethane alkyd resin based primer dissolved in white spirit.

Uses
It is designed primarily for sealing asbestos cement and other porous, cement bound substrates. It greatly reduces any tendency of Decothane systems to develop blow- holes or pinholes.

Benefits
The single pack formulation ensures ease of use and rapid contract completion. It also helps to reduce wastage of top coats by excessive absorption on highly absorbent substrates.

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