Description
A solvent based, cold applied bituminous adhesive for bonding successive layers of
roofing felt. It is formulated for convenience and safety, ensures affinity and a strong
final bond to bituminous membranes. It is used for:
- Bonding roofing felts to metal, timber, concrete and asphalt
- Lap Cement
- Bonding chippings to flat roofs
Colour
Black
Method of Application
By stiff brush, mop or squeegee. To avoid thickening in cold weather, store Felt
Adhesive in a warm room overnight prior to use.
Instructions
Care needs to be taken over preparation of surfaces before application. All surfaces
must be free from oil, dirt, dust and loose debris. All traces of algae and fungus
growth should be removed using a stiff brush and the surface treated with a
fungicide to kill any remaining spores thereby discouraging the return of any growths.
Felt Adhesive should be applied to the surface and left for 15 to 30 minutes
(depending upon drying conditions) in order to develop its full tackiness. The felt
should then be placed into the wet adhesive film carefully, rubbing or rolling each
section down to ensure maximum contact with the adhesive and to expel air trapped
between the surface and the felt. Wherever possible the felt should be rolled into the
felt adhesive and rolled with a light roller (15 to 25Kg).
The overlaps should be at least 75mm on the side and 150mm at the ends. To
ensure a complete bond at the side and end laps, Felt Adhesive can be applied to
the underside of the felt and well compacted.
When using with a timber structure the first layer of felt must be nailed down in order
to comply with BS 8217:1994 Successive layers of felt may then be bonded with Felt
Adhesive.
When used on concrete surfaces that are porous it will be necessary to first prime
the surface with Bituminous Primer, ensure that the primer is completely dry before
the first layer of felt is applied.
24 hours after laying felt check all bondings to ensure that full adhesion has been
obtained. Particularly check all laps, if in doubt, press home or re-roll any that appear to be lacking adhesion.
Coverage
Approximately 2m² per litre.
Cleaning Tools
Tools may be cleaned with white spirit. Minor spillages should be wiped off surfaces
before the Felt Adhesive has set. Major spillages should be mopped up immediately
with an inert, absorbent material, such as sand, and disposed of in accordance with
regulations.
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