Master Bitumen Roofing Felt Adhesive 5 litre
is a cold applied adhesive for
bonding bituminous roofing felts to asphalt, felt, metal,
wood and concrete. It can also be used for bonding
mineral chippings to bituminous surfaces.
All surfaces must be clean, dry and free from loose
material. Dusty and porous surfaces should be primed
with BITUMEN PRIMER
Where possible, felt to be laid
should be cut to size and positioned for 24 hours to
to the roof area
with a mop, squeegee or stiff brush. Do
not exceed guideline coverage rates.
Allow the adhesive to become tacky to touch
(typically 15 minutes to 1 hour) then place the
roofing felt into position. The felt should be
lapped: side laps minimum 75mm and end laps
minimum 150mm, and the laps sealed with FELT ADHESIVE.
When laying the felt it is important to ensure
that no air is trapped underneath, particularly when laid
over a previous layer of felt or other waterproof coating.
Roll with a 15Kg roller or thoroughly brush with a stiff-
broom until good overall contact is established between
felt and adhesive, especially at the laps. NB. If felt is
applied too soon, the drying time of the adhesive will be
extended and the adhesive may ooze out. When felting
upstands, adhesive should be applied to both adhesive and felt.
AS A LAP CEMENT can be used to bond
laps on single layer applications Ensure area to form lap
is completely coated with adhesive and press firmly to
expel air when tacky. The lap should then be nailed with
galvanised clout head nails to secure bond.
Drying will vary depending on weather conditions and
time allowed for adhesive to develop a tack. 24 to 48
hours is typical. However, heavy applications will result
in extended drying times.
AS A ROOFING FELT ADHESIVE COVERAGE UP TO 0.8SQ METRES PER LITRE
DRYING TIME AROUND 24 - 36 HOURS DEPENDING ON AMBIENT TEMPERATURES