MAXFLEX® XJS
ELASTIC SEALING SYSTEM FOR EXPANSION JOINTS

Description

MAXFLEX XJS is a system a composed of a EPDM rubber strips with lateral fleece edges which is fixed using an epoxy adhesive or cement based mortar over an expansion joint or crack subjected to movement. It assures a water tight joint while allowing the movement of the treated element, both for interior or exterior applications.

Uses

- Waterproofing of expansion joints in walls, canals, roofs, water reservoirs, basements and foundations.
- Waterproofing of cracks, corner joints, etc.

Advantages

- Very high elasticity, over 350%
- Excellent adhesion to the usual substrates found in construction.
- Does not require a dry substrate for fixing.
- Good chemical resistance.
- Very easy to apply.
- Complete water tightness.

Application Instructions

Preparation of the substrate. The substrate must be clean, free from dust, rust, oils or grease. When using epoxy adhesive the substrate must be fully dry. Remove casting skins, loose or cracked parts by using brushes, grinders or sandblasting. Pre-fill gravel pockets using MAXREST or MAXEPOX BOND – G (sanded over). Re-profile major fills.

Strip preparation. Pre-assemble all strip joints,mitres, crossings or corners before installation. Make sure that all fleece edges are dry if MAXEPOX BOND – G is going to be used. Application Depending on the type of substrate, work conditions, technical requirements, two different products can be used for fixing the strip. The first MAXEPOX BOND – G, epoxy adhesive, (See Technical Bulletin Nē.: 72.00) which requires a perfectly dry substrate to ensure bonding and which also provides a much higher value of adhesion, or MAXSEAL FLEX (See Technical Bulletin Nē.: 29.00) preferably in its smooth type, which allows applications over wet substrates, providing enough adhesion to the majority of substrates in the usual working conditions, with important material savings when compared to epoxy.

Base coat. In either case, watch the pot life of the product applied. Follow the instructions in the technical bulletins carefully. Liberally apply the base coat material on the substrate in order to provide the strip with proper bonding. The approximate consumption for MAXEPOX BOND – G is about 0,7 a 0,8 kg. / linear meter, and for MAXSEAL FLEX between 1,5 and 2,0 kg. / linear meter.

Placing. Place the MAXFLEX XJS strip with the white fabric strip facing down. Press the fabric with a trowel well into the adhesive to allow it to soak

Top coat. Apply the top coat of adhesive "wet on wet". The fabric strips must be completely soaked and covered (2 - 3 mm.) with the adhesive. It is not advisable to cover the rubber with the adhesive. MAXEPOX BOND – G should be sanded with silica sand.

Mechanical protection. The expansion area of MAXFLEX XJS should be protected against mechanical damage during and after the building stage. (e.g. with a metal sheet cover or rubber granular matting.)

Joints

The connections of MAXFLEX XJS strips are done by thermal welding (hot air) as can be seen in the following drawings.

- The patches for welding areas are best cut out from the elastic expansion area of MAXFLEX XJS.
- The welding surfaces must be dry and clean.
- If cleaning agents are used, allow to dry out for 30 minutes.

Cautions

MAXFLEX XJS must not be exposed to long term temperatures exceeding 70ēC. Prior to using other adhesives, we recommend that compatibility and suitability be checked first. The precautions indicated in the technical bulletins of the bonding products used must be followed. These can be abrasive in their composition. When mixing or placing use rubber gloves. If the products come in contact with the eyes rinse thoroughly with clean water. Do not rub. Consult a doctor ir the irritation continues.

Packaging

Supplied in 30 mts. long rolls and in two sizes.

| A | B | C | D
mm | mm | mm | mm
MAXFLEX XJS 180 | 35 | 25 | 60 | 180
MAXFLEX XJS 220 | 30 | 20 | 120 | 220

Colours

Blue

Storage

24 months, in its original packaging, in a dry covered place, protected from frost.

Technical Data

Type of rubber | EPDM
Thickness | 1,00 mm
Tensile strength (lengthwise) (crosswise) | 11,0 N / mm2 10,0 N / mm2
Elongation at break (lengthwise) (crosswise) | 350 % 325 %
Low temperature foldability | < - 20ēC
Change in shape at high temperature (lengthwise) (crosswise) | - 0,35 % - 0,60 %
Vapour penetration coeficient | 0,038 mg / m2 h Pa
Vapour diffusion resistance m | 10.420
Ozone resistance | Nivel 0
Accelerated thermal ageing Change in tear strength Change in mass | < 4 % - 1,24 %
Artificial weathering | > 5000 hr
Resistance to root penetration | No penetration
Fire rating | 5,2
Water submerged performance Low temperature folding Change in mass over 8 months | - 20 ēC < 3,5 %
Mechanical perforation resistance 500 grs from height .... | 400 mm.
Strength of joints (welded) Location of rupture Shear resistance Peel resistance (epoxy bond) | Beside the seam 610 N / 5 cm. 305 N / 5 cm
Bitumen contact change of E modulus | + 11 %
Chemical resistance Saline solutions, bitumen, diluted acids Mineral oils, petrol, strong solvents | Good Weak
Maximum expansion recommended of elastic area 15% MAXFLEX XJS 180 ( 60 mm) MAXFLES XJS 220 ( 120 mm) | + 9 mm + 18 mm
Tests performed according to SIA 280 except thickness, Elongation at break and change of modulus in contact with bitumen, according to DIN 16726

Guarantee

The information contained in this leaflet is based on our experience and technical knowledge, obtained through laboratory testing and from bibliographic material. DRIZORO reserves the right to introduce changes without prior notice. Any use of this data beyond the purposes expressly specified in the leaflet will not be the Company’s responsibility unless authorised by us. We shall not accept responsibility exceeding the value of the purchased product.

© 2003 DRIZORO S.A. All rights reserved.