Selleys N Mastic is a non-hardening, waterproof sealing putty designed for a wide range of applications where long-lasting flexibility is crucial. Ideal for sealing joints, gaps around windows, and roofing, it ensures that structures remain protected from water ingress. The unique formula remains pliable, making it perfect for environments where movement and expansion are expected. Whether you're sealing an outdoor roof gutter, securing window frames, or filling gaps in an air conditioning system, Selleys N Mastic provides a professional-grade finish with no cracking or crumbling. The product is also suitable for metal, glass, concrete, and brick, making it a versatile solution for residential, commercial, and industrial projects. N-Mastic is a non-skinning polybutene-based compound. It will remain permanently soft and paste-like. Uses N-Mastic is suitable for sealing concealed lap joints between plastics, metals, timber, glass, masonry, and expanded foam panels. It may be used in the installation of cool rooms, prefabricated construction and gasket sealed windscreens to exclude draughts and water penetration through joints in materials. Technical Features Non-hardening – remains permanently flexible to provide a lasting seal Good adhesion – adheres well to most substrates Moisture resistance – provides an excellent barrier to moisture vapour Microbe resistance – resists microbial attack Low shrinkage – avoids the risk of sealant pulling away from joint surfaces Wide service temperatures – withstands –40oC to +80oC service conditions Application Tips Due to the non-skinning, non-hardening nature of the sealant, N-Mastic should not be used in exposed joints where dirt pick-up or hand contact can be a problem. As N-Mastic is not elastomeric, it should not be used in areas subject to considerable dynamic stress. Although N-Mastic is resistant to static pressures, a curing sealant is recommended where this is a critical factor. N-Mastic is not recommended for sealing lap joints in mobile homes, truck bodies, etc., as significant vibration and flexing occur during travel. Technical Details and Performance Indicative information only, not to be used for setting specifications. Colour Off White Specific Gravity 1.4g/mL Consistency Non-sag Slump (MIL-S-8802, @ 32oC ) 2.5mm maximum Viscosity (Brookfield HAF 7/2 @ 25oC ) 10,000 – 14,000 Poise Flash Point 85oC Storage Life (25oC ) Indefinite Packaging Plastic cartridge (410g) Performance Properties Shrinkage (% maximum) 5 Service Temperature –40oC to +80oC Life Expectancy Up to 20 years Clean Up Sealant may be removed with a cloth dampened with kerosene or mineral spirits
$22.74
Features Resists intense heat Sets hard Water clean up Where can this product be used? Repairing bricks in fireplaces and chimneys Sealing flues in pot-belly stoves Filling cracks in ironworks and bricks What materials is this product suitable for? Brick Metal Concrete How to Use: Remove all dust, grease and loose debris before applying material. Dampen the cavities on porous surfaces for better adhesion. Apply Fireproof Cement firmly into holes and cracks with a damp knife or spatula. Allow Fireproof Cement to dry a minimum of 48 hours before exposure to heat. If Fireproof Cement is stiff slacken with a little water. Limitations: Fireproof Cement is not an adhesive - it is a filling compound. Not recommended for external use e.g. BBQ's, incinerators etc. Fireproof Cement is not suitable for use in kilns. Fireproof Cement is not recommended for moving joints such as expansion joints as it sets rigidly Hardened material cannot be resoftened with water.
$49.46
Polishes internal furniture & joinery that has been previously waxed or oiled Suitable for Timber, concrete, slate, terracotta and stucco All-natural ingredients Apply with a lint-free cloth Polishes internal furniture and joinery that has been previously waxed or oiled. Rejuvenates french polished/lacquered items and leather items. Uses: Also suitable for sealing and polishing slate, terracotta and stucco Coverage: Up to 40m² Apply with: Lint-free cloth Number of coats: 2 Sheen level: Pale Satin
$27.16
Polishes internal furniture & joinery that has been previously waxed or oiled. Rejuvenates french polished/lacquered items and leather items. Also suitable for sealing and polishing slate, terracotta and stucco Coverage: Up to 40 m2 Number of Coats: 2 Recoat: 24hrs Sheen Level: Pale Satin
$12.26
A blend of nut and citrus oils specially formulated to create a drying oil to maintain and rejuvenate wooden items that come into regular contact with food or water which can cause the timber to swell and dry out. Simple wipe on and wipe off application to make timber look & feel nourished. Maintain wood items that come in contact with food & water. Ideal for wooden chopping boards, serving bowls and utensils. 250mL Simple wipe on and wipe off with a rag
$16.88
PC-11® thrives in wet environments. It is resistant to water whether it is fresh or salt. Thick consistency like PC-7® and long open time (30 min). Work horizontal or vertical, indoor or outdoor. Wet, dry or under water. Whether you are working on an area where you just can’t remove water and moisture or you want the white colour for your repair, PC-11® is your choice. Choose PC-11® for ceramic repairs, pools and spas, fibreglass boats, tubs and sinks, stock tanks and thousands of other repairs. It has excellent adhesive properties bonding metals, fibreglass, wood, tile and some plastics such as ABS and rigid PVC. Ample open time allows tooling or positioning in order to tackle larger and challenging jobs. When mixed, the epoxy, part A (white) and the hardener part B (lt. blue) react to form a bond of tremendous strength and flexibility. The PC-11® formulation is slow curing, but slow can be a good thing especially for large tasks. WORKING TIME: 30 MINUTES CURE TIME: 24 HOURS (48 HOURS FOR FULL CURE) PC-11® is thick. Thick is good if you need to work vertically or want to hold an object in place. How thick? Not quite as thick as peanut butter. Here are just a few specific uses (there are hundreds of other uses): Reattach missing swimming pool tiles. Patch a hole in a fibreglass canoe or the fibreglass keel of a fishing boat. Repair cracked or damage swimming pool or hot tub skimmer. Waterproof and Seal cracked fibreglass. Seal screw holes to hatch lids or seating. Attach fish locators to transom. Repair stock tanks. Repair broken refrigerator door shelf fixtures. Repair broken pottery. Repair shower basin or antique bath tub. Seal leaking air conditioner drip pan. Seal underground conduit. How to prepare a surface for bonding with PC-11® Epoxy Paste Remove contaminants such as dust, dirt, oil, barnacles and grime with a solvent such as Denatured Alcohol, Acetone, Rubbing Alcohol (isopropyl alcohol) or Lacquer Thinner. A mild detergent solution in water is also good removing contaminants. Use a clean paper towel or rag for wiping. Do not use Mineral Spirits or Paint Thinner for removing contaminants. For a wet or underwater surface; clean contaminants as best as you can. Solvents will not help you in this situation. Remove rust and loose paint with sandpaper or wire brush. Epoxy typically sticks to most paints. If there is a concern of the paint’s adhesion then remove it with sandpaper or wire brush. Smooth, glossy and shiny surfaces should be roughened using sandpaper to increase adhesion. How to clean-up after PC-11® Epoxy Paste application Use Denatured Alcohol, Acetone, Rubbing Alcohol (isopropyl alcohol) or Lacquer Thinner to clean tools and mixing surface before PC-11® cures. Clean hands and skin with soap and water. Cured epoxy can be removed by applying Paint Remover or Paint Stripper to soften the epoxy surface. Scratch off the softened epoxy. Repeat as needed. Can PC-11® be used in Aquariums? There is the potential for PC-11® part A and part B to harm sea life but properly measured and mixed PC-11® has been used safely in fresh and saltwater aquariums. It is important that part A and B are thoroughly and completely mixed. What plastics does PC-11® stick to? PC-11® has good adhesion to Rigid PVC and CPVC, polyester and fiberglass, polyurethane, ABS and Bakelite. What plastics does PC-11® not stick to? PC-11® does not stick to polyethylene, polypropylene, HDPE, polystyrene, nylon, acrylic, Teflon, and polycarbonate. What rubbers does PC-11® stick to? PC-11® sticks to SBR, Buna, and polyurethane rubbers and does not stick to EPDM, vinyl and neoprene rubbers. What temperatures can PC-11® be applied? PC-11® cures very slowly at temperatures below 50°F (10°C). At or below freezing temperatures the PC-11® will stop curing. In hot conditions, above 95°F (35°C), PC-11® will cure rapidly reducing the working or application time. Can gel coat be applied to PC-11®? Gel coat will not cure properly in direct contact with PC-11®. It is important that repairs made with PC-11® be sealed with a suitable primer/sealer before applying a gel coat. Can PC-11® be painted? Yes. It is good practice to apply a premium stain sealing primer to repairs made with PC-11® prior to the finish coat. Will PC-11® yellow in direct sunlight? Yes, PC-11® yellows in direct sunlight. PC-11® resists ultraviolet light but will still gradually change colour. Prime and paint if the colour is important. Can PC-11® be thinned with solvent? PC-11® does not contain solvents. Acetone and denatured alcohol (ethanol) are compatible but will extend the cure time and decrease the hardness. Other solvents such as mineral spirits, paint thinner and turpentine are not compatible. PC-11® is a simple one to one mix, but how accurately does the measurement need to be? The volume of part A to part B should be close to equal. A slight excess of part A is preferable to an excess of part B. Excess of part B will not accelerate the curing and it may make it softer.
$18.79
$22.78
$38.96
Metal tins for brush/roller or spreader application—common for contact adhesives and solvent-borne systems. Observe ventilation guidance and specified open time for proper tack. Use filters to refine by chemistry and clean-up. Always check the product page and TDS/SDS for safety and usage.
