SikaFast®-1640 is a toughened and impact resistant no-mix acrylate based on 2-components.
 
Includes:
SikaFast®-1640 Gel Squeeze Bottle - 50 g
SikaFast®-1640 Activator Bottle - 10 ml
 
Suitable to bond glass, ceramic, metal and a combination of these materials. SikaFast®-1640 Gel must be used in combination with SikaFast®-1640 Activator.  
Ideal to bond rear mirror brackets to windscreens
100 % reactive substance, no solvents
Very fast curing to handling strength
 
Application
Surface preparation
Surfaces must be clean, dry and free from grease, oil and dust. Remove all loose particles or residues by cleaning thoroughly, for example with an IPA wipe.
Due to the diversity of materials, preliminary tests with original substrates are necessary.
Application
Mark the area where the adhesive has to be applied for correct alignment. Apply plenty of the SikaFast®-1640 Activator with the brush, which is part of the closure of the bottle to one of the bonding surfaces. On glass to metal applications, the SikaFast®-1640 Activator is applied on the glass side.
The SikaFast®-1640 Activator is free of solvents and must be liquid when joining the two parts. It therefore must not dry off.
Apply a thin layer of the SikaFast®-1640 Gel onto the other substrate.
Join the part with the activated glass surface and hold with light pressure for about 20 seconds. Excess adhesive must be removed immediately (within 40 seconds from joining) with a clean cloth.
The adhesive reaches about 50 % of the final strength after 15 to 20 minutes.
 Optimum temperature for the bonding process is between 15 °C and 25 °C. The influence of the reactivity by temperature changes has to be respected.
Avoid bonding on glass surfaces that were exposed to direct sun light (hot surface).
Due to the limited gap filling capability of SikaFast®-1640 the bond faces must have compatible contours. The bonded area must not exceed 10 cm², due to higher risk of stress-cracking.
Removal
Uncured excess SikaFast®-1640 can be removed easily before curing with a dry wipe, with Sika® Remover-208 or another suitable solvent. Once the adhesive is cured it can only be removed mechanically.
Hands and exposed skin shall be washed immediately using Sika® Cleaner-350H towels or a suitable industrial hand cleaner and water.
Do not use solvents on skin.