Description

LAYBOND CV is a light coloured synthetic resin emulsion, designed to produce
excellent initial grab.

Uses

LAYBOND CV is used for bonding most carpets, rigid and semi-flexible vinyl
tiles and selected sheet vinyl (Halsteads Polyflor XL/ Gerflor Classic). please
consult with Laybond Technical Department for further details. It can be applied
to concrete, cementitious screeds, chipboard, hardboard, plywood and smoothing
compounds. With care, textile floorcoverings can be laid on non-porous surfaces,
such as asphalt, although it is always advisable to apply a minimum 3mm
application of LAYBOND SCREEDMASTER 2 LATEX SMOOTHING COMPOUND.

LAYBOND CV is not suitable for highly plasticised PVC or needlepunch carpets
with a nylon content in excess of 30%.

LAYBOND CV may also be used as part of the LAYBOND QUICKSTRIP
Carpet Release System.

It is suitable for use where there are underfloor heating systems. However,
heating should be switched off at least 48 hours before and after installation of
the floorcovering.

Preparation

Relevant Standards:

All phases of the installation should comply with the latest editions of the
following standards:-

BS CP102 Code of Practice for protection of buildings against water from the
ground.

BS 5325 Code of Practice for installation of textile floorcoverings.

BS 8203 Code of Practice for installation of sheet and tile flooring.

Sub-floor

The sub-floor should be clean, structurally sound, dry and free from any
contaminants, including surface hardeners and additives that may hinder
adhesion. It should also have an effective damp-proof membrane and be
suitably dry to receive a bonded floorcovering.

The only British Standard approved test for dryness is by properly calibrated
and insulated hygrometer giving a reading less than 75% RH. Where this has
not been achieved the use of LAYBOND HYDROTITE or LAYBOND SEALDECK
surface membranes will suppress residual moisture in a power floated concrete
slab or sand/cement screed provided that a base dpm has been incorporated.
Please refer to the appropriate data sheet for full information.

Any deep indentations in the sub-floor should be repaired using LAYBOND
PLYCORAPID followed by a standard application of a suitable LAYBOND
SCREEDMASTER SMOOTHING COMPOUND.

Existing Floorcoverings

LAYBOND CV can be used to bond textile floorcoverings over most underlays.
It may also be used to bond textile floorcoverings over rigid PVC Tiles.

LAYBOND CV must not be used to bond PVC over existing resilient floorcoverings.

Smoothing Compounds

Where floors require smoothing, a suitable LAYBOND SCREEDMASTER
SMOOTHING COMPOUND should be applied at a minimum thickness of 3mm.
Where a concrete base has had a surface treatment, this should be mechanically
removed prior to smoothing compound application.

Priming

Boards and other porous surfaces should be primed using diluted ISOBOND
(1:6 with clean water) and allowed to dry.

Application

Porous Surfaces

LAYBOND CV should be spread evenly over the floor surface with a triangular
notched trowel cut 1.5mm deep at 5mm centres. For textile or embossed
backings, the notch size should be increased to 2mm deep at 6mm centres,
or deeper if recommended by the floorcovering manufacturer. The adhesive
should be spread with a sweeping motion at a 60º angle and the floorcovering
placed into the adhesive while it is still wet. Even pressure should be applied to
ensure good overall contact.

For open textured backings e.g. felt backs, allow the adhesive to become tacky
before placing the floorcovering into place.

Non-Porous Surfaces

When laying onto non-porous or low porosity surfaces eg.asphalt, LAYBOND
SCREEDMASTER 2 LATEX SMOOTHING COMPOUND should be applied to
a depth of 3mm and allowed to dry overnight. Application can then proceed as
for porous surfaces. However, where circumstances preclude this treatment
either of the following methods should be used:-

i) Lay the carpet into wet CV and apply light pressure to obtain good adhesive
transfer. Pull back immediately and allow the adhesive to reach a touch tacky
state, or


ii) Allow the adhesive on the floor to reach a touch tacky state. Then place
the carpet and press firmly overall to obtain contact.

The first method is preferred where non-porous carpets or those with an
inherent curl are being installed. The second method is preferred for open texture
backings e.g. felts.

Finishing

It is essential to ensure good overall contact between the carpet and the adhesive.
This may be achieved by use of a suitable WOLFF roller or other method
recommended by the carpet manufacturer.

Safe Handling Precautions

Flammability: Non-flammable

Skin Contact: Occasional contact is unlikely to have an adverse effect except
on particularly sensitive skin. As a general precaution avoid repeated or
prolonged contact. Remove skin contamination when wet with water. Use
proprietary hand cleaner if the product has dried.

Eye Contact: Although no serious problems are likely to be caused, eyes
are a sensitive area and contact should be avoided. In the event of accidental
contact, irrigate immediately with plenty of cold clean water and obtain medical
attention.

Inhalation: No major hazard; nevertheless use in a well ventilated area. In the
unlikely event of discomfort as a result of inhalation, remove the person to fresh
air.

Oral Ingestion: With proper handling this should not occur. The possibility can
be minimised by not consuming food in the working area and by washing hands
thoroughly before eating, drinking or smoking.

Spillage: Spilt material should be mopped up immediately with an inert,
absorbent material, such as sand, and disposed of in accordance with regulations.

Disposal Of Containers: Do not leave empty containers on site where residue
could be a hazard to children, animals or the environment. Replace lids and
remove any containers to a central disposal point.

Cleaning Of Tools

Clean immediately after use with water or white spirit if the material has dried.

Cleaning Of Surface

Any LAYBOND CV on the surface of the floorcovering should be removed
immediately with a damp cloth. Do not allow to dry.

Storage

12 months under good storage conditions in original, unopened containers.
Keep out of direct sunlight at a temperature of between 5ºC and 40ºC.
PROTECT FROM FROST.

Container Sizes

LAYBOND CV is supplied in 15 and 5 litre plastic containers.

SPECIFICATION SUMMARY

Type of Solvent Water borne, containing some white spirit.
Flash Point Non-flammable.
Approximate Specific Gravity 1.2.
Approximate Coverage 45-55m² per 15 litres.
Application Temperature Limits 5-40ºC (but a minimum 15ºC recommended for vinyls).
Service Temperature Limits Up to 40ºC.

Note: We endevour to ensure that any advice , recomendation or information
we may give in product literature is accurate and correct. However, we have no
control over the circumstances in which our product is used. No responsability
can be accepted or any warranty given by ourselves, our representatives, agents
or distributors, other than that the product supplied by us will meet our written
specification. Products are sold subject to our standard conditions of sale and
each purchaser and end user should at all times ensure that he has consulted our
latest product and safety information sheets.