Product Facts
- Product Name
- Pro Trade Joint Sealant LM - Polyurethane Sealant by Selleys
- Availability
- In Stock
- Condition
- New
- Category
- Home & Garden > Sealants & Adhesives > Construction Sealants
- Seller
- Selleys
Pro Trade Joint Sealant LM - Polyurethane Sealant by Selleys
Selleys Pro Trade Joint Sealant LM is a non-slumping polyurethane joint sealant with high movement capability, low modulus and excellent adhesive properties. Features high flexibility (±25% joint movement), excellent resistance to weathering and ageing, non-slumping cure with no bubbles, and no shrinkage during curing. Suitable for both interior and exterior applications on vertical and horizontal joints.
Product Data (OpenAI Spec)
View Full JSON Spec ↗Specifications
| Sag | 0mm (EN ISO 7390) |
|---|---|
| Colours | White Grey Black |
| Density | 1.20 ±0.03 g/mL |
| Cure Rate | ≥2.5mm / 24h |
| Technology | Polyurethane |
| Limitations | Not for continuous submersion or below‑water‑line use. Won't adhere to polyethylene or polypropylene without testing. Do not apply on frozen or wet surfaces. Oil‑based paints require priming, especially if applied more than 5 days later. |
| Application Temp | 5‑40°C |
| Shore A Hardness | ~35‑40 |
| Tack‑Free Time | 20‑70 minutes (23°C / 50% RH) |
| Tensile Strength | ~1.5‑2.0 N/mm² |
| Directions for Use | 1. Clean and dry surfaces; remove oil, grease, dust. 2. Insert backing rod if required; mask edges for neat finish. 3. Cut nozzle, load cartridge/sausage into gun. 4. Extrude sealant evenly into joint, ensuring full side contact; avoid air entrapment. 5. Tool off for smooth finish. 6. Paint with water‑based paints once cured; for oil‑based, use primer first. 7. Clean uncured sealant with mineral turps; remove cured sealant mechanically. |
| Elongation at Break | ≥600% |
| Service Temperature | –40°C to +90°C |
Product Intelligence
Pro Trade Joint Sealant LM - Technical Details, Specifications, and Features
Product Overview
Pro Trade Joint Sealant LM is a non-slumping polyurethane joint sealant manufactured by Selleys, designed as a high-performance, one-component elastic adhesive and sealant. The product combines advanced polyurethane technology with low modulus properties, making it ideal for versatile construction and sealing applications in both indoor and outdoor environments.
Key Features
The sealant offers several distinctive advantages for professional applications:
- High Flexibility: Provides +/-25% joint movement capability, accommodating significant structural shifts and expansion/contraction cycles
- Excellent Adhesion: Demonstrates superior bonding to common building materials including concrete, masonry, brick, ceramic tile, metals, soft wood, hardwood, and select plastics
- No Shrinkage During Curing: Maintains dimensional stability throughout the curing process, preventing gaps and reducing maintenance issues
- Cures Bubble-Free: Produces smooth, professional finishes without air pockets or surface defects
- Paintable: Compatible with water-based paints after curing; solvent-based paints require water-based primer undercoat
- Weatherproof: Provides excellent resistance to aging and weathering, suitable for exposed exterior applications
Product Forms and Packaging
Pro Trade Joint Sealant LM is available in multiple configurations to accommodate different application requirements:
Available Formats:
- Foil Sausage: 600 mL containers
- Cartridge: 310 mL containers
Color Options:
- White
- Grey
- Black
Technical Specifications
The product demonstrates robust technical performance across multiple measured parameters:
| Property | Specification |
|---|---|
| Technology | Polyurethane |
| Density | 1.2 ± 0.03 g/ml |
| Application Temperature Range | 5°C to 40°C |
| Tack-Free Time (at 23°C and 50% R.H.) | 20-70 minutes |
| Cure Rate (at 23°C and 50% R.H.) | ≥2.5 mm/24 hours |
| Sagging (EN ISO 7390) | 0 mm |
| Tensile Strength (ASTM D412) | 1.5-2.0 N/mm² |
| Elongation at Break (ASTM D412) | ≥600% |
| Shore A Hardness (ASTM C661) | Approximately 35-40 |
| Modulus at 100% Elongation (ISO 8339) | 0.35-0.40 N/mm² |
| Service Temperature Range | -40°C to +90°C |
| Viscosity | Greater than 21 mm²/s at 40°C |
Standards and Certifications
Pro Trade Joint Sealant LM meets rigorous industry standards:
- EN 15651 Certification: Conforms to requirements for sealants for non-structural use in joints in buildings and pedestrian walkways
- Acoustic Compatibility: Will not degrade acoustic walls that meet Building Code of Australia (BCA) requirements
Recommended Applications
The sealant is designed for multiple construction and sealing applications:
- Expansion and construction joint sealing in vertical and horizontal configurations
- External wall and cladding joints, including precast and tilt-up panels
- Weatherproofing joints between brickwork, masonry, concrete, cladding, wood, or metal frames
- External joints in walls and around window or door frames
- Joints in bridge and balcony parapets
- Retaining walls and roofing applications
- Acoustic-rated wall construction
- Adhesive bonding for window sills, thresholds, stair steps, skirting boards, base boards, crash protection boards, and prefabricated elements
Joint Configuration Requirements
Optimal sealant performance requires specific joint dimensions and preparation:
Recommended Width-to-Depth Ratios:
- For joint widths up to 12 mm: use a 1:1 width-to-depth ratio
- For joint widths greater than 12 mm: use a 2:1 width-to-depth ratio
- Minimum joint width and depth: 10 mm
Essential Installation Requirements:
- Install suitable diameter backing rod (polyethylene or polyurethane foam rod) to control sealant depth and ensure free movement
- Sealant must adhere to joint sides only, not the back, allowing free stretching
- Wider joints accommodate more total movement than narrow joints
Coverage Data
The following coverage estimates assist in material planning:
| Joint Width | Joint Depth | Coverage per 600 mL |
|---|---|---|
| 5 mm | 8 mm | 5 m |
| 20 mm | 10 mm | 3 m |
| 25 mm | 12 mm | 2 m |
| 30 mm | 15 mm | 1.3 m |
| 35 mm | 15 mm | 1.1 m |
Storage and Shelf Life
- Shelf Life: 15 months when stored in original packaging
- Storage Conditions: Keep away from direct sunlight and moisture, maintain temperature between 10°C and 25°C
- Container Storage: Store in cool, dry conditions below 30°C
Safety and Hazard Classification
Pro Trade Joint Sealant LM has been classified as not hazardous according to Safe Work Australia GHS 7 criteria. The product is not classified as dangerous goods under Australian transport regulations (Australian Code for the Transport of Dangerous Goods by Road & Rail) or New Zealand standards (NZS5433), and meets international maritime and air transport safety criteria.
Limitations
- Not recommended for continuous submersion or below water-line use
- Cannot be applied on frozen or wet surfaces or through standing water
- Will not adhere to polyethylene or polypropylene; adhesion testing is recommended for other plastics
References
- [1] PRO_TRADE_JOINT_SEALANT_LM-AUS_GHS.pdf
- [2] pro-trade-joint-sealant-lm-tds.pdf