CRC ADOS MS Sealant Black 400g Primerless Adhesion Waterproof MS Polymer Sealant For Contractors

CRC ADOS MS Sealant Black 400g is a high-performance, one-component neutral-cure adhesive sealant based on MS polymers. It delivers durable bonding, sealing and waterproofing for dilation joints and gaps in demanding building, construction and engineering projects. When silicone sealants aren’t suitable, this MS sealant provides reliable primerless adhesion to a wide range of substrates, offering a practical, long-lasting solution.

BRANZ Appraised for White (8361), Black (8363) & Grey (8364). Clear (8362) is not included in the BRANZ appraisal.

Why this sealant stands out

• Primerless adhesion to PVC, concrete, brick, timber, glass, aluminium, iron, stainless steel, copper, brass, zinc, ceramic, plywood and cement plaster systems, plus many modern materials—reducing surface prep and speeding up installation.
• Neutral cure with no acids, and solvent-free, isocyanate-free and silicone-free formulation for safer handling and compatibility with paint systems.
• Extreme flexibility and excellent elasticity across a wide temperature range, maintaining bond strength and tear resistance over time—even in dilation joints.
• Non-slump and ultra-low shrinkage (<1%), allowing thick-layer applications and vertical joints without sagging or distortion.
• Non-bubbling and non-staining—the cured surface stays smooth, and it won’t stain substrates or finishes.
• Paintable after curing with most solvent- and water-based paints and varnishes, simplifying finishes on visible joints.
• UV resistant and weather-ready for interior and exterior use, resisting harsh sunlight and exposure without cracking or aging.
• Low odour and low VOC for safer use in occupied spaces.
• Easy clean-up—cleanup is straightforward with a damp cloth on uncured product, making on-site handling simple.
• Quick skin formation to resist dirt and dust while curing, helping projects stay tidy during installation.
• One-component convenience—extrudes from cartridges with low force, even at lower temperatures, and does not require mixing.

Ideal use cases

• Expansion and dilation joints in concrete, metal, masonry and composite assemblies.
• Bonding, sealing and waterproofing gaps in façades, curtain walls, window and door frames, kitchens, bathrooms and wet areas where silicone isn’t suitable.
• Applications that demand long-term elasticity, UV resistance and durable performance in both indoor and outdoor environments.
• Any project requiring a paintable, primerless sealant that remains flexible and non-corrosive over time.

How it performs on the job

ADOS MS Sealant’s MS polymer base delivers a robust bond to a broad spectrum of substrates, creating a single, versatile product that can replace multiple sealants in a project. Its non-slump behavior is particularly valuable for vertical joints and thicker bead applications, while its low shrinkage ensures the seal remains tight and uniform as it cures. The product’s durability translates to sustained seal integrity, even after years of exposure to sun, rain, heat and cold.

Application guidance

• Prepare joints with clean, dry surfaces free of dust, grease and moisture for best adhesion.
• Apply in a single smooth motion; the product extrudes with relatively low force even at cooler temperatures.
• Allow the surface to skin over quickly to resist dirt pickup; complete curing depends on ambient temperature and humidity.
• Uncured material cleans up easily with a damp cloth; cured sealant is paintable with most solvent- and water-based paints and varnishes.
• Interior and exterior use; suitable for a wide range of materials including PVC, concrete, brick, timber, glass, aluminium, steel, copper, ceramic and more.

Technical snapshot

• Appearance: Black sealant in a 400 g cartridge
• Base: MS polymer
• Cure type: Neutral cure
• VOC/odour: Low VOC, low odour
• Compatibility: Paintable; compatible with most solvent and water-based paints
• Strengths: Excellent adhesion, waterproofing, elasticity, tear resistance, and durability over time
• Special features: Non-slump, non-bubbling, non-staining, ultra-low shrinkage, solvent-free, silicone-free, isocyanate-free
• Appraisal: BRANZ Appraised for White, Black and Grey variants

For projects requiring a durable, paintable, primerless MS sealant with strong adhesion to a wide range of materials and reliable performance in both interior and exterior conditions, CRC ADOS MS Sealant Black 400g is a compelling, practical choice. It combines fast skin formation, long-term elasticity and easy maintenance—delivering a seamless, lasting seal where silicone isn’t suitable.