* Properties listed above are only based on controlled laboratory samples and tests: Results may differ based upon statistical variations depending upon mixing methods and equipment, temperature, application methods, test methods, actual site conditions and curing conditions.
SealPro Bitumastic is a cold applied, single component, solvent based bitumen rubber mastic joint sealant based on high-quality bituminous rubber designed for sealing terminations in conjunction with bituminous waterproofing membranes. It is black in color, exhibiting a non slump consistency and cures by solvent release, to form a tough flexible waterproof seal. It is an ideal sealant in low movement & construction joints from 5 to 40 mm width and has excellent adhesion to concrete, masonry, brickwork, asphalt, and many other construction material substrates. The mastic sealant is modified with non-asbestos fibres to make the sealant thixotropic and slump free when applied on vertical areas.
SealPro Bitumastic cures to form a black, flexible seal, accommodating continuous cyclic movement of up to 10% of the joint width as a total movement, and is supplied ready for use giving consistent properties. The surface must be made dry prior to the application of the sealant
Additional Information
Product:
Packaging:
Colours:
SealPro Bitumastic
20L pail & 200L drum
Black
BondPro Primer SB
Coverage/ Yield:
Number of litres required =
Joint width (mm) x joint depth (mm) x joint length (m) /1000
Joint Size in mm
Litres per LM
LM per 20 itre pack
(W X D)
(W X D X L /1000)
10 x 5
0.050
400.00
10 x 10
0.100
200.00
15 x 7.5
0.1125
177.78
15 x 10
0.150
133.33
20 x 10
0.200
100.00
30 x 15
0.450
44.44
40 x 20
0.800
25.00
*Estimation & Coverage: Length of joints (in meters) filled per 20 litres of SealPro Bitumastic
* Care should be taken to allow for wastage
*All coverage rates given are theoretical and subject to actual site conditions. We recommend trial areas are done to establish practical consumption
Width to Depth ratio:
Design of the joint should be done keeping in view the movement capability of the sealant. Normally a width to depth ratio of 2:1 must be maintained in joints subjected to movements. Joints should be designed so that total movement due to concrete shrinkage and thermal change does not exceed the ± 25% (MAF) movement accommodation factor related to the joint width, in accordance with the recommendations of BS 6093
Joint width design recommendations:
Sealant depth shall never exceed joint width.
Minimum 10mm for all porous surfaces.
Minimum 12mm for non-moving construction floor joints
Minimum 20mm for joints exposed to hydrostatic pressure or permanent immersion. N.B. Joints subject to total immersion should have a 1:1 profile.
Minimum 20mm for expansion or movement joints exposed to traffic with the sealant tooled to a depth of 3mm below flush.
Joint depth design recommendations:
For non-immersed expansion joints, subject to cyclic movement, and greater than 20mm wide, it is important that the depth should not exceed half the width to optimize the elastomeric properties of the joint sealant
Minimum 6mm for non-porous surfaces
Minimum 8mm for porous surfaces
Minimum 20mm for trafficked joints
When using filler boards in expansion joints to achieve the correct depth, it is essential to use a backer rod or insert a bond breaking tape into the joint in order to prevent 3-point adhesion
Typical Applications
Especially designed for roof waterproofing applications in combination with Torch on Membranes.
Flexible joint sealant for filling gaps and joints of pipes / roof flashing, penetrations etc. to assure the waterproof performance of the entire roof
Termination of waterproofing membranes
Pointing horizontal chases for waterproofing membranes and felts.
Sealing around roof/wet service pipes.
Sealing cracks in asphalt and concrete pavements.
Filling horizontal joints in concrete and asphalt where movements are not expected.
Sealing low movement joints in concrete pavements, precast concrete elements, bridges, building structures, etc.
Sealing joints at waterproofing membrane termination grooves, filling gaps and sealing between brick work and roof flashing
Sealant for tiles, slates, manhole covers, around pipe entries, pipe joints, seawalls, subways, corner details and basement structures.
Benefits
Single component, ready to use -No Pre-heating is required.
Flexible joint sealant
Excellent adhesion to concrete, brickwork, asphalt and most construction material substrates.
Stability at high ambient temperatures
Excellent adhesion, Oxidation resistance, strong durable bond
Good expansion and contraction properties
Good Mechanical Properties
Do not contain asbestos, Chromated copper arsenate and lead
Economical
Chemical resistant: Resists deterioration from dilute acids & alkali, oil, salts, bacteria.
Contributes toward satisfying LEED® v4 requirements of the EQ Credit- Low-emitting Materials (for the VOC content)
Long term durability and function can only be achieved with good preparation to give a strong adhesive & mechanical bond to the substrate. New concrete should be fully cured with a maximum residual relative humidity (RH) of 75%.
Existing sealants should be cut out and removed prior to preparation of the joint faces.
Prepare concrete surfaces preferably by mechanical methods such as angle grinding or rigorous wire brushing. to remove laitance, curing compounds and other loose materials to provide a mechanical key for SealPro Bitumastic.
After preparation, small chips & arris imperfections can be repaired using RepairPro EP FC (see separate data sheet) to provide a smooth even surface. Allow RepairPro EP FC to cure for 24 hours and lightly abrade prior to priming.
Priming
When required, use a foam backing rod to act as a bond breaker and taking care to maintain the correct width/depth profile of between 2:1 & 1:1 in accordance with good joint sealant design.
It is recommended to use masking tape to obtain neat straight edged seals. The tape should be removed immediately following the completion of the sealant application.
Under normal circumstances priming is not required. However, for very dry and porous surfaces, it is recommended to apply one coat of a solvent-based bitumen primer AquaShieldPro Primer SB. Similarly for joints subjected to continuous immersion, priming is recommended.
Stir AquaShieldPro Primer SB thoroughly to mix any solid materials that may have settled at the bottom of the packaging, until a homogenous consistency is achieved.
Apply AquaShieldPro Primer SB using brushes, at a theoretical coverage rate of 4 – 6 m² per litre per coat. Allow the primer to become touch dry before applying the sealant. A second priming coat may be required if the substrate is particularly porous. Re-prime if the primer coat has not been sealed within 16 hours
Product Preparation
Normally no mixing is required for this product. However, as the product is solvent-based, it is recommended to mix the contents of the pail with a paddle mixer for a few minutes prior to the application to ensure a homogenous mix
Product Application
Apply SealPro Bitumastic into the prepared joint or termination using a scraper, spatula/trowel or putty knife or solid barrel gun, ensuring the void is completely filled. Immediately tool the joint with the spatula or putty knife to smoothen and compress the sealant to effect total contact with joint surfaces. The putty knife shall be moistened with a cleaning solvent to prevent the sealant to adhere to the knife and ensuring a smooth and neat finish. Where masking tape has been employed to keep joint surfaces clean, it is advisable to remove them at the moment the sealant filling is completed.
Curing Time:
The sealant cures on solvent release. The initial surface skinning will occur within 24-48 hour, however full cure depends on relative humidity. A 10mm depth of seal will typically cure within 14- 21 days @23°C @50% RH.
Hot Weather Conditions
For application above 40ºC we recommend adopting the following guidelines:
Store materials in a cool preferably air-conditioned environment. Avoid exposure of materials to direct sunlight. Avoid application during the hottest time of day
Others
Finishing:
In order to displace any air bubbles present in the sealant caused by mixing and also as an aid to good adhesion, it is advisable, immediately after the SealPro Bitumastic has been installed, to finish by tooling with a rounded spatula or similar object. The outermost surface of the sealant should be finished with a slightly concave profile. On no account must moistened fingers be used. Protect the finished seal from inclement weather until initial set has taken place and the surface skin is clearly visible. Finally, strip off any masking tape that may have been used.
Cleaning:
Clean all the tools with the water after use. Hardened materials can be removed mechanically only.
Allow the waste to cure. Seal it into a suitable container and bury in landfill. Use licensed waste disposal contractor and consult the local authorities when disposing.
Storage & Shelf Life:
12 months if stored in original unopened containers in a cool dry environment at ambient temperatures below 25°C. Do not store in direct sunlight. Damaged packaging, high humidity or extreme temperatures may reduce the shelf life.
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