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Technical Advisory Document TAD0007
Approved primer list - FIRETEX thin film solvent based single pack range
| Primer Type |
Overcoating time (@15°C @TDS dft) |
| Alkyds |
| Leighs M155 |
24 hours |
| Leighs M255 |
7 days |
| Leighs M600 |
24 hours |
| Leighs L489 |
7 days |
| Leighs L489/L654 (see note 1) |
7 days |
| Quick drying blast primers |
| FIRETEX C69 |
30 minutes |
| Metagard G280 |
4 hours |
| Metagard L574 |
4 hours |
| Epoxy (see note 2) |
| Epigrip M111 |
24 hours |
| Epigrip C400V3 |
24 hours |
| Epigrip M400 |
24 hours |
| Epigrip C425V2 |
24 hours |
| Epigrip L425 |
24 hours |
| Epigrip M455V2 |
24 hours |
| Epoxy Zinc Rich (see note 3) |
| Epigrip K232 |
24 hours |
| Epigrip J984 |
24 hours |
| Water Based |
| Envirogard M260 |
24 hours |
| Envirogard M624 |
24 hours |
| Others |
| Galvanised/L703 |
3 hours |
| Galvanised/L703/K267 |
24 hours |
| Zinc Metal Spray/M330 |
24 hours |
| FIRETEX basecoat/M71V2 |
24 hours |
Note 1
- By inference of L489/L654 giving satisfactory performance, any of the other alkyd primers overcoated with L654 will also be satisfactory.
- For generic type it would be expected that all short/medium oil alkyds applied up to 75 microns dft would be acceptable if at least 24 hours drying is allowed prior to application of the FIRETEX.
Long oil alkyds in general and short/medium oil alkyds applied in excess of 75 microns dft should be treated with caution and will have a minimum overcoating time of 14 days. Even then overcoating will be dependant on carrying out a satisfactory site trial using the method of application which will subsequently be used on the job in question.
The above is general guidance and does not overwrite any manufacturers Technical Data Sheet or other advice.
Note 2
Generally epoxies which have been allowed to cure for at least 24 hours will be satisfactory but they must be overcoated in accordance with the manufacturers Technical Data Sheet. In certain instances, such as pre-adducted epoxy primers, abrading the surface will be necessary.
Epoxy schemes can be used up to a total dft of 250 microns.
Note 3
It is strongly recommended that where zinc rich primers are to be used, then these are tie-coated to prevent formation of zinc salts. For further guidance see ASFP TGN 006.
General Notes
- A multi-coat alkyd scheme of primer/uct/gloss/uct/gloss/uct/gloss (total dft ca. 250 microns) has been tested and was found to be satisfactory. This was using all Leighs Paints products and so the full scheme details were known.
Existing multi-coat paint systems where details of the scheme are not known as the scheme has been built up over many years, must be removed and the substrate reprimed prior to application of the FIRETEX.
- Zinc silicate can be used but this MUST be tie-coated and even then there is the potential for bubbling/blistering/pinholing in the dried FIRETEX. Best advice is not to use zinc silicates under FIRETEX.
- Galvanising, provided it is treated correctly gives no cause for concern.
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