RESIBLOCK '22'™

Method Statement

On newly installed areas of blocks, ensure paving is sealed with RESIBLOCK '22' simultaneously with pavement construction, on a daily basis. DO NOT WAIT until project is complete.

PRODUCT – RESIBLOCK '22'

CONTAINER SIZES

RESIBLOCK '22' is available in 25 litre containers.

APPEARANCE

RESIBLOCK '22' in the container appears as a low viscosity prepolymer urethane having a hydrocarbon odour. Application will not significantly alter the appearance of concrete pavers other than a slight darkening of the surface. This will ultimately become absorbed giving the appearance of being unsealed.

COVERAGE

Coverage can vary between 1.6-2.0 m2 per litre, (on any areas of new C.B.P. slightly more, @ 2.2 m2 per litre) depending on the age/condition of the paver and quality, depth, width and dryness of jointing sand. Accurate application rates are essential to achieve full technical benefits. Furthermore material usage can increase by up to 25% on old/worn pavers. RESIBLOCK '22', being a single pack product, must be used straight from the container without thinning or addition of a reactive agent; it must not be diluted.

SUBSTRATE/SURFACE CONDITIONS

The surface should also be clean and free from oil, algae, dust and lime bloom. Temperature must be above 3degrees C and below 30degrees C. Application outside of these temperature ranges is possible, but contact our technical department first. Surface must be dry. Jointing sand which contains moisture will prevent bonding and stabilisation of joints. Do not use if rainfall is forecast within 8 hours of project completion.

If you wish to confirm that the paving is perfectly dry, scrape out the jointing sand to a depth of 25mm; if it is dry, so are the pavers.

Ensure that the sand does not protrude from the base of the chamfers, if the sand is not properly removed, it may be picked up by the application tools.

PREPARATION - NEW PAVERS

If there are any areas which have been reinstated utilising new pavers, all that should be required is a good sweep with a stiff broom, however if the surface has become partially weathered or contaminated, wirebrush to remove all debris. For large areas pressure cleaning may be more effective. For successful use, optimum performance and maximum penetration of RESIBLOCK '22', ensure joints are well filled to the bottom of the chamfers with clean, compacted kiln-dried sand, complying to BS 6717 or equiv. (See notes on substrate conditions re sand removal and moisture).*

Ideally, at the time of installation, joints should only be half filled with kiln dried sand. This would allow final filling and compaction on the same day that the surface is to be sealed. The jointing sand thereby being completely dry, allowing for optimum absorption conditions of the RESIBLOCK '22'.

Application to poorly prepared pavers particularly in respect of dampness can result in inadequate joint penetration or paver adhesion, and in exceptional circumstances, disbonding.

Engineers note. Application specification should note moisture content of the pavers not to exceed 6% and air temperature should be checked to ensure it is within 3degrees C of the dew point. In an exceptionally dry atmosphere, increase the humidity, e.g. with a water sprinkler, the block paving should the be allowed to dry, leaving sufficient residual moisture to allow polymerisation to take place.

In the event that the humidity has been increased with a water sprinkler, the remaining kiln dried sand may be added once the block paving has dried.

PREPARATION – EXISTING PAVERS

The entire area should be pressure cleaned. The primary purpose is to remove a significant portion of the jointing medium, ideally to a depth of around 25mm. This will enable fresh kiln dried sand to be installed commensurate with the application of RESIBLOCK '22', thereby ensuring optimum absorption.

The secondary reason for pressure washing the surface is to remove any surface debris that may have contaminated the surface affecting the ultimate aesthetics. This action should also blast out all weed and grass infestation from the joints. The entire foregoing process would be aided considerably utilising a commercial vacuum sweeper set at maximum suction velocity.

Once the substrate has been allowed to dry thoroughly, the joints between the pavers must be re-filled using kiln dried sand. This can be done simply by placing fine dried jointing sand onto the paving and sweeping in using a conventional soft broom. Finally completely remove surplus sand as previously described.

Note. Occasionally the action of pressure washing will cause substrate saturation and/or reactivate efflorescence.

EQUIPMENT

RESIBLOCK SQUEEGEE.

METHOD OF APPLICATION - SQUEEGEE

An area approximately 1m by 10m should be marked out and the contents of a 5 litre container (gauging pot e.g. 5 litre watering can with rose attached) evenly poured out over the designated area. This should be immediately spread out and wiped from the surface and into the paver joints using a RESIBLOCK SQUEEGEE. Sufficient material should be worked into the joints so it will initially fill the chamfers (ultimately to be completely absorbed). Surplus RESIBLOCK '22' must not remain on the paver surface but squeegeed into the joints as described.

Note. Solvents are released during the cure that normally permeate through the sealer, however if the RESIBLOCK '22' is applied too thickly, the substrate is damp or excessively cold, bubbling may occur, giving the appearance of a white/milky residue, however this should not impair its technical performance.

CURING PERIOD

Rapid initial cure will take place depending on ambient temperature, humidity and block porosity; 1-6 hours can be expected. Immediately the surface is dry the paved area can be subject to traffic but ideally full chemical cure should be allowed to take place (24 hours) before being subjected to full traffic use.

STORAGE

Containers should be stored under cover and be protected from extremes of temperature. Partly used kegs should not be stored. Any remaining traces of RESIBLOCK '22' in used drums must be cured by leaving the containers open; and in dry conditions, putting water into each container.

SHELF LIFE

RESIBLOCK '22', (unopened containers), has a shelf life of 12 months.

CLEANING TOOLS AND EQUIPMENT

RESIBLOCK '22' cures rapidly when exposed to atmospheric moisture, to give a film that can only be removed with great difficulty. For this reason it is recommended that all equipment be cleaned immediately using RESICLEAN. Do not use other solvents as unknown synergistic reactions may take place. Wash with water and detergent afterwards. RESICLEAN is also effective in the removal of splashes and spillages of uncured RESIBLOCK '22'.

HEALTH AND SAFETY GUIDELINES

PVC gloves and protective clothing/face shield should be worn, plus use of a barrier cream on exposed areas of skin, as uncured RESIBLOCK '22 may be considered a hazardous material.

No smoking or naked flames, as RESIBLOCK '22 is flammable. Ensure area to be treated is well ventilated. Due to the fact that this is an airfield, a normal No Smoking policy (airside) must be followed.

A mask of the recommended type is essential when using a paintbrush, working close to the surface or internally. Sabre or Martindale is recommended.

Do not apply RESIBLOCK '22 in the presence of foodstuffs. Once fully cured RESIBLOCK '22can be considered innocuous. Do not clean hands with RESICLEAN as solvents tend to de-fat skin that can lead to dermatological problems.

Do not return unused material to original containers. DO NOT RESEAL or store partly used kegs. Material so stored may have poor adhesion and Carbon Dioxide may generate and put the drum under pressure, which might rupture the drum. Furthermore partial or total solidification of the sealant may occur.

Please refer to Resiblock Limited's current Material Data Sheets for the latest and comprehensive information on this section.

*Jointing sand

Sand to BS 7533 must be used in accordance with the following extract.

BS 7533 Pt 3 (1997)

SPECIFICATION FOR JOINT FILLING SAND

4.4.4.4. Joint filling

Filling the joints between paving units is essential. It is essential that dried free-flowing sand is used. Materials conforming to the grading in table B.3 should be used. Sand which might stain the pavement surfaces should not be used. Moisture content not to exceed 5%.

The test method used for determining the grading for jointing material should be the washing and sieving method described in BS 812: Section 103.1. For category 1 sands, the test should be carried out on five sub-samples, each not less than 1000 g, and the mean taken of the results.

It may be possible that locally sourced ('river sand') sand, not fully meeting the above specification, is usable, however it is critical that it is pre-dried and this may be carried out by the use of an asphalt plant or similar.

Whilst Resiblock Limited believe that the data contained herein is factual, the opinions expressed are those of experts (qualified or otherwise) regarding the results of tests. The data is not to be taken as a warranty or representation for which Resiblock Limited assumes legal responsibility. This data is offered solely for your consideration, investigation and verification. Any use of this data must be determined by the user to be according to the applicable laws and regulations.

Resiblock Limited try to ensure any advice, recommendations or information we may give in product literature is accurate and correct. However, we have no control over the circumstances in which our products are used, hence our advice does not release end-users from the obligation to satisfy themselves by prior testing that the product/s is suitable for their specific application, and that the actual conditions of use are suitable.

Accordingly no responsibility can be accepted, or any warranty given by representatives, agents, distributors or ourselves. Each end-user should always ensure that they have consulted our latest publications and that the relevant information concerning this material is communicated to all members of their organisation handling our products.

Resiblock Limited's liability is for replacement of material proved to be defective only. Products are sold subject to our Standard Conditions of Sale.

The Company's policy of continuous product development and improvement renders specifications liable to modifications. Information provided in this literature is therefore subject to change without prior notification

This entire document is copyright protected. All rights reserved. First published in Great Britain 1993. No part of this publication may be produced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording and/or otherwise without prior written permission of the publishers.