Adhesive Cascophen Resorcinol 2pt (£14.28)
|CASCOPHEN is specifically designed for use wherever
maximum resistance to weathering is required, e.g. garden furniture,
storm porches, constructional laminating, marine craft, gluing laminated
plastic both to wood and itself and gluing asbestos.
CASCOPHEN is supplied in the form of a "two-part pack" consisting of a liquid resin and powder hardener. The powder hardener must be thoroughly mixed into the resin before use.
Produces bonds which will withstand intermittent or continuous exposure to: moisture, immersion in cold or boiling water, moist or dry heat, attack from mould or fungus, most organic solvents.
Complies with: British Standard Specification 1204/WBP cc GF - Synthetic Resin Adhesives Parts I and II, bss 1203/WBP
With most kind of construction, joints, when properly made, are stronger than wood itself. Bonds difficult timbers such as teak.
STORAGE: Controlled storage temperature is not normally required for CASCOPHEN Resorcinol Resin which will remain in a usable condition for over one year at a temperature of 20ºC. Containers should be kept tightly closed when not in use. Lower temperatures such as provided by domestic refrigerators will considerably extend this period. The hardener used with CASCOPHEN Resorcinol Resin also has a very long storage life at normal room temperature 20ºC. Containers must be kept dry and tightly closed.
DIRECTIONS FOR USE:
MIXING - For consistent results the resin/hardener proportions should always be accurately determined. The resin should be stirred whilst the hardener is being added in order to avoid the formation of lumps. Mixing equipment should be kept free of any alkaline or acidic material for, as CASCOPHEN Resorcinol Resin Glue is neutral, even traces of these materials will affect the glue mix and subsequently the working life and pressure period.
CASCOPHEN RS-12: 5 parts by weight
HARDENER RXS-25 : 1 part by weight
Table of USABLE LIFE, assembly periods and pressing times at various temperatures
SPREADING: CASCOPHEN Resorcinol Resin Glue can be spread with a stiff bristled brush, roller or spatula. The amount of glue required will be between 6oz and 1lb (170/450g) per 10 feet sq. (0.9m sq.) of surface area being glued depending upon the work being carried out. When using dense timber or timber of high moisture content or with rough surfaces, the spread should be nearer the higher figure and the lower figure used only for smooth surfaced timber when close fitting joints can be ensured.
The joints may be single or double spread (i.e. the glue applied to one or to both surfaces of the joint), but it is recommended that double spreading should be carried out whenever possible. This will ensure even wetting of both surfaces, and will assist in obtaining the maximum assembly times. For best results, wooden surfaces should be prepared by sanding, sawing or planing immediately prior to gluing. Avoid using blunt tools or worn sandpaper.
MOISTURE CONTENT: The recommended moisture content limits of the wood are 6%-14% prior to gluing. Once set and thoroughly seasoned, the bond is unaffected by moisture.
ASSEMBLY PERIODS: The assembly period is the time elapsing between spreading the glue and bringing the work under pressure for curing. These assembly times will vary with the temperature, but the table above may be taken as a good guide. When the glue mix is nearing the end of its working life, it should be noted that sufficient unexpired life must remain to allow not only for the assembly period, but also for the application of pressure.
PRESSURE: Adequate and even pressure by press, cramps, screws, nails etc. is required to smooth out the glue film and to force air out of the joint so that the wood surfaces are brought into uniform contact wit the glue. Pressure should be evenly distributed across the width of the assembly or joints being made, especially when working on curved sections. For general work, sufficient pressure to bring the joints into uniform contact is all that is required.
Clamping should be carried out from one end of the construction to the other or from the centre outwards in each direction. When laminating bends, etc. it is important that the laminate should be free to slide as pressure is applied.
PRESSURE PERIODS AND CURING TIMES: CASCOPHEN Resorcinol Resin Glue, being thermosetting, is affected by temperature variations. The pressure periods applicable at various temperatures are given in the table above. It should be noted that curing at temperatures below 15ºC is not recommended. The times quoted are sufficient for normal handling of unstressed constructions, but joints should be allowed to season at room temperature for a minimum period of twenty-four hours if they are to be machined.
GENERAL NOTES: When bonding 'difficult' timbers it is recommended that:
a) Smooth surfaces should be removed by rough sanding or light toothing (i.e. to produce a surface as would result from the use of a fine hacksaw blade).
b) A minimum of twenty to thirty minutes closed assembly period should be allowed before the application of pressure. This will enable the glue to penetrate the surface fibres of the timber and so avoid excessive squeeze-out.
c) In cold weather, the curing temperature of the glue should be raised as high as possible after the application of pressure, if necessary by applying localised heat to the joint. Temperatures between 15-25ºC (59-77ºF) are ideal. Bond quality and durability may be reduced if the glue is allowed to set below these temperatures.
a) Asbestos to wood: CASCOPHEN Resorcinol Resin Glue can be successfully used for bonding asbestos board to itself and to timber surfaces.
b) Preservative treated timber: CASCOPHEN Resorcinol Resin Glue is suitable for use on most preservative treated timbers.
CLEANING OF EQUIPMENT: CASCOPHEN Resorcinol Resin Glue is water soluble until it is cured and as such may be removed from the hands, clothing, brushes, mixing and spreading equipment with warm soapy water. Once the glue has hardened it is difficult to remove from equipment and cannot be removed from clothing. The liquid glue can stain certain fabrics, clothes etc. should be suitably protected during use.
WARNING: This material gives off an inflammable vapour. Flash point 46ºC (115ºF). Keep away from sparks and naked flames.
PROTECTION OF THE HANDS: The use of synthetic glues can produce dermatitis. A wet swab should be used frequently to prevent any glue from setting on the hands. Where repeated contact is unavoidable, rubber gloves should be worn and a suitable barrier cream may be desirable.