Alcolin K86 Specification

TECHNICAL DATA SHEET

PJ/D181/Issue 05/Oct 2017/K86 Page 1 of 4
Next Revision: Oct 2022

ALCOLIN K86 SILICONE SEALANT

Description

ALCOLIN K86 SILICONE SEALANT is a contractor’s grade one-part acetoxy-curing silicone sealant
that provides a permanent flexible watertight seal for general purpose sealing in and around the
house.

Features & Benefits

 Non-sag – can apply on vertical surfaces
 Mould resistant – suitable for use in damp areas e.g. showers, bathrooms
 Flexible at temperatures as low as -50°C
 Heat resistance up to +150°C
 Versatile – adheres to a wide variety of substrates
 Waterproof – suitable for external applications
 Excellent UV resistance and abrasion resistance – long lasting durable bond
 Unaffected by alcohols, dilute acids and alkalis, soap and household detergents
 Excellent colour fastness; clear grades are non-yellowing
 Moisture curing system; cure rate is unaffected by low ambient temperatures

Applications

ALCOLIN K86 SILICONE SEALANT is ideal for sealing, bonding, and mending in cars, boats, caravans, and
houses e.g. sealing around bathroom and kitchen fittings, baths, showers, sinks, toilets, oven door windows,
window frames, boards, signs, insulating appliances, fixing leaking plumbing, etc.

Adhesion

ALCOLIN K86 SILICONE SEALANT exhibits excellent primerless adhesion to many non-porous materials e.g.
ceramics, glass, enamel, porcelain, coated wood, painted surfaces, canvas, stainless steel, aluminium, some
rubbers and some plastics (epoxide, polyester, polyacrylate, polystyrene, formica, fiberglass, acrylics,
polycarbonates and rigid PVC).

Limitations

Not suitable for alkaline surfaces such as concrete, fibrous cement, asbestos, plaster and marble, as the product
releases acetic acid during curing.

Not suitable for some metals such as mild steel, lead, copper, tin, galvanized iron, brass or zinc as it may cause
corrosion.

May become discoloured in contact with some organic elastomers, which tend to bleed oil or solvents into the
silicone, e.g. EPDM, APTK, Neoprene and Bituminous surfaces. It should not be used on the back of mirrors, as it

TECHNICAL DATA SHEET

PJ/D181/Issue 05/Oct 2017/K86 Page 2 of 4
Next Revision: Oct 2022

will de-silver the mirror backing, affecting the front appearance of the mirror. Not suitable for contact with
marble, granite, quartzite, and similar natural stone as it may discolour the surfaces.

Will not adhere to some plastics such as polyethylene, polypropylene and Teflon.

CANNOT be over-painted.

NOT SUITABLE FOR FISH TANKS (contains a fungicide).

Do not apply sealant when relative humidity is below 10% - cure rate will be affected.

Safety instructions

When working with uncured ALCOLIN K86 SILICONE SEALANT, it is advisable to wear gloves in order to avoid
direct contact with the skin. During curing, acetic acid is released; these vapours should not be inhaled for long
periods or in high concentrations. Consequently, work in a ventilated area.

If ALCOLIN K86 SILICONE SEALANT comes into contact with skin or eyes, flush thoroughly and immediately with
water. If irritation continues, seek medical attention.

Cured silicone rubber can be handled without any risk to health.

Keep ALCOLIN K86 SILICONE SEALANT out of reach of children!

Refer to our Material Safety Data Sheet for further toxicological information and comprehensive handling
instructions.

Surface preparation

 Surfaces coming into direct contact with ALCOLIN K86 SILICONE SEALANT must be clean, dry, free from all

loose materials, dust, dirt, oil, rust and any other contaminants.

 Non-porous substrates such as metals, glass and plastics should be degreased with a solvent. Plastics can be

lightly abraded with emery paper. On no account should any type of alcohol be used for surface cleaning –
alcohols inhibit the cure of silicones.

 Soaps or detergents used to clean the surface must be rinsed away thoroughly with clean water to ensure

that all traces of the soaps are removed before sealing.

 Poor surface preparation may result in the delamination of the silicone.

Directions for use

 Ensure surfaces are prepared as above.
 Cut tip off cartridge and screw nozzle onto cartridge. Cut the tip of nozzle at an angle to achieve the

desired bead size. Apply silicone with a caulking gun in a continuous bead to the prepared joint.

 Use masking tape to get a clean, even sealant line and to eliminate cleaning difficulties on porous

surfaces. Be sure to remove the tape before sealant begins to skin.

 Smooth down after application (within 3-5 minutes) before skin formation occurs, by using a flat or

rounded tool or even a finger, dipped in soapy water.

 Sealant will be touch dry within 1 hour and reaches full cure after approximately 24hours.
 A pungent vinegar-like odour will be noted during application but will disappear as the sealant cures.
 If the area being sealed, needs to be painted, ensure the paint has dried COMPLETELY before sealing.